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PLEUROBRANCHIDAE
287
ish. Gill plume on right side of body, with 20 to 22 primary leaflets on each side, with a nodule on the main stem where they originate. Primary leaflets with 1 5 smaller leaflets, each of which has 5 to i o microscopic plates. Shell
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Figure 61. Pleiirobranchus atlmiticits Abbott, i V2 inches. 2 and 3, entire animal; 4, rhinophore; 5, cross-section of velum; 6, genitalia; 7, details of gill plume; 8, shell; 9, radula; 10, platelets in mandibles. (From R. T. Abbott 1949, Nautilus vol. 62.) small, calcareous, pinkish white, flat with a small spire, and located under the dorsum. Moderately common in shallow water in winter on Soldier Key, near Miami. Originally collected by F. M. Bayer, P. gardineri White is a synonym.
