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viii
CONTENTS.
Mactradæ
279
Mactra
280
helvacea
ib.
stultorum
ib.
Donacidæ
ib.
Donax
281
politus
ib.
Tellinadæ
282
Psammobia
283
vespertina
284
Solenidæ
284
Solen
286
siliqua
287
marginatus
288
Myadæ
289
Mya
290
arenaria
291
Gastrochænadæ
294
Gastrochæna
ib.
modiolina
295
Saxicava
ib.
Pholadidæ
298
Pholas
301
parva
ib.
dactylus
ib.
BRACHIOPODA 309
Terebratula
311
psittacea
ib.
TUNICATA 312
Ascidiadæ
313
Ascidia
314
virginea
315
Clavelinadæ
ib.
Perophora
ib.
Listeri
ib.
Botryllidæ
317
Botryllus
ib.
polycyclus
ib.
Salpadæ
318
Salpa
319
runcinata
320