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A HISTORY OF CORNWALL 181 165. Gibbulaumbilicata,M.ovt. Gen. dist. and usually 177. c. round coast and at Scilly, chiefly from h. w-m. to 1. s. t-m. var. atro-purpurea Jeffreys, Fal- mouth, Hayle, and Mawgan Forth (Miss Hockin) 1 66. Mmodonta crassa, Montford. C. on restricted areas on rocky beaches all round coast and at Scilly chiefly from above h. w. m. to half t-m. 167. Callwstoma montagul, W. Wood. Scarce in trawl ,- 7 ,j - refuse and in dredgings from deep water ; in 2 5 fm. Falmouth B. ! Mount's B. ; in 40 fm. offMenavawr, Scilly (S. & C.) 1 68. C. striatum, Linn. Chiefly on Zostera beds, where it is often abund. ; Cawsand B. (M.B.A.), Falmouth, v. c. ; Helford ; Mount's B. ; Land's End (McAndrew) ; Padstow ! Scilly, abund. 169. C. exasperatum, Pennant. Dead shells occ. 1 80. found, live specs, r. ; Falmouth, Helford, Mount's B., Land's End 170. C. miliare, Brocchi. In 30 fm. Falmouth (Hockin) ; Porthgwarra, in trawl refuse (Dennis) ; Wolf Rk. (Miss Came) ; at Scilly one spec, in 40 fm. off Menavawr (S. & C.) 171. C. granulatum, Born. N. unc. on sandy and on fine gravel in deep water ; Eddystone Gnds. (M. B. A.) ; Whitsand B. (Jeff.) ; in 35 fm. off Polperro (Robinson) ; trawl refuse at Meva- gissey ! in 20 to 25 fm. Falmouth B. ! Mount's B., Land's End (Maton) ; dead shells l $ 2i in Widemouth B. (Miss E. A. Reynolds) ; a few dead and imperfect specs, off Menavawr (S. & C.), and live specs, from St. Mary's S. (M.). var. lactea Jeffreys, Mount's B. and 183. St. Mary's S., Scilly (M.) 172. C. zizyphinus, Linn. C. under stones and in rocky crevices at 1. w. along S. coast and locally on N. ; also in trawl refuse, and in 25 fm. in. Falmouth B. ! Scilly everywhere at 1. w. but n. c. var. Lyons! Leach, near Fowey (M.) ; Helford (Hockin) ; Mount's B. alive from trawl (Tre- gelles) ; Porthgwarra (Marquand) ; under stones and overhanging rocks on the Golden Ball bar, and in deep water off Menavawr (S. & C.). var. humilior Jeffreys, Scilly (M.). var. laev igata J. Sow, Helford (Hockin), trawl refuse Mount's B. (Tregelles). var. granulifera Jeffreys, Mount's 184. B. (Tregelles). var. elate Jeffreys, one spec. Falmouth (James) 173. Delphinoidea cutkriana, Clark. Fowey (Barlee), Falmouth in 30 fm. ! Helford (Hockin), and Sennen ; dredged off Menavawr and Muncoy jgr Neck, Scilly (M.) 1 74. D. nitens, Philippi. Fowey (M.) ; in 40 fin. off the Dodman ! in 30 fm. Falmouth B. ! Sennen; off Menavawr and Muncoy neck (M.) 175. D. serpuloides, Mont. In 30 fm., Falmouth B. ! 186. Mount's B. ; 5 specs, at Harlyn B. (Thelwell) ; dead shells off Menavawr and Muncoy, but live specs, at 1. w. and in Crow S. Chan. (M.) 176. Phastanella pullus, Linn. Gen. dist. and locally c. on Zostera and algae from 1. w. down to 187. lofm. ; Scilly abund. in the roads, var. pul- chella Rich., Scilly (M.) 148 Lacuna eras sior, Mont. Porthcurnow (Dennis); Hayle (Hockin) ; 2 dead specs, in deep water, Scilly (S. & C.) L. divaricata, Fab. On Zostera and fucus- covered rocks from 1. w. to 1. s. t. ; c. at intervals along S. coast ; one spec. Harlyn B. (Thelwell). var. quadnfasdata Mont, in shell sand irregularly along S. coast L. parva, da Costa. Occ. on sea-weed between l.w. and 1. s. t-m. ; Cawsand B. (M. B. A.) ; near Polperro ! Porthcurnow (Dennis), Land's End (Hockin) ; dead shells, Hayle ; 3 specs. Harlyn B. (Thelwell) ; St. Mary's, Scilly. var. conica Jeffreys, and var. expansa Jeffreys, Mount's B. (M.). var. lactea Jeffreys, Hayle (Miss Hockin) L. pallidula, da Costa. Gen. dist. and locally c. round the coast, gen. on fucus-covered rocks at 1. w. also at 30 fm. in Falmouth B. ! at Scilly 1 spec, from the inner channel, 2 from deep water (S. & C.). var. patula Thorpe, Lantivet B. (Laughrin), Falmouth (M.). var. albescens Jeffreys, Mount's B. (M.) Littorina obtusata, Linn. Abund. everywhere on Fucus and Zostera. var. neritlformis Brown, Land's End ! var. ornata Jeffreys, Falmouth (James), Helford (M. R. L). var. fabalts Turton, Falmouth, and Maenporth (Dennis) L. nentoides, Linn. Locally c. round coast on rocks at h. w. m. and above ; Scilly on the outer rocks only L. rudis, Maton. Abund. on almost every rocky shore on the mainland and at Scilly about h. w-m. var. saxatilis Johnst. Helford and Mount's B. (Miss Tyacke). var. sulcata Leach, Land's End (Turton), Scilly (Barlee). var. jttgosa Mont. Falmouth (M.), Helford (M. R. I.), Prussia Cove (Miss Tyacke), Penzance, r. (James), var. patula Thorpe, Lizard, Mount's B., Gurnard's Hd. (Miss E. Carne), Portreath, St. Agnes, var. globosa Jeffreys, Hayle (Miss Hockin). var. tenebrosa Mont. Hayle, Port- reath, St. Agnes ; Newquay c. var. ilmiRs Jeffreys, Kynance Cove (Miss Tyacke) L. httorea, Linn. N. unc. between t-m. on mainland and often most abund. ; at Scilly only 2 specs, found on the E. coast of Bryher (S. & C.). var. brev'uula Jeffreys, Maenporth (Miss Dixon) ; also in M. R. I. Rissoa parva, da Costa. Gen. dist. round coast and at Scilly from between t-m. to 40 fm. var. interrupta Adams, littoral and shallow water form ; irregularly round coast, Scilly c. var. exilis Jeffreys, Falmouth and Scilly (M.) R. inconspicua, Alder. Porthpean nr. St. Austell under stones, rr. (Richards) ; in 25 fm. Fal- mouth B. ! Mount's B. chiefly dead shells ; Porthcurnow apparently all dead shells ; Land's End ; occ. off Muncoy Neck, Scilly (M.) R. albella, Loven. Type has not been found, but James obtained 3 specs, of the var. sarsii Loven, at Land's End.