MAK1NE MOLLUSKS OF THE SOUTH-EASTERN COAST. 193 



PLATE XLVIIL 



FlG. 1. Drillia thea Dall ; 15.0. 



2. Oscilla nivea Morch ; 8.5. 



3. Manrjilia limonitella Dall ; 6.75. 



4. Turbonitla (Partheiila) cedrosa Dall ; 5.5. The aperture is a little broken. 



5. Mitra floridana Dall ; 6.0. 



(j. Pho8 parvus Ads. var. intricatus Dall ; 13.2. 



7. Drillia leucocyma Dall ; 7.5. The last whorl of this specimen has been re- 



paired after fracture. 



8. Teeth of Capulus hungaricus Linm'', much enlarged. 



9. Sipho pyymceus Gould, showing soft parts. 



10. Tachyrhynchus erosa Couthouy?, showing animal and part of the shell, en- 



larged. Cape Cod northward, West America, Arctic Seas. 



11. Liostraca Hemphillii Dall ; 3.0. 



12. Crepidula (Janwus) nnguil'ormis Lamarck, dentiti ai much enlarged. 



13. Nassa triviitata Say, twice uat. size, showing animal as if crawling. 



14. Limacina helicina Phipps; dentition, enlarged. 



15. Scissurella crispata Fleming, showing animal, from a sketch by Lucas Bar- 



rett; 4.0. 



16. Crepidula fornicata Lamarck, from below, showing soft parts; 20.0. 

 Figures 1-7 and 11 were drawn by J. C. McConnell and first appeared in the Pro- 

 ceedings of. the U. S. National Museum. Figures 9', 10, 13, and 16 were loaned by the 

 U. S. Fish Commission and are now first published. They were drawn by Prof. A. E. 

 Verrill. Figures 8, 12, 14, and 15 have appeared in the publications of the British 

 Museum and Woodward's Manual, and were loaned by the Smithsonian Institution. 



PLATE XLIX. 



FIG. 1. Terebratulina caputserpentis Linn6, showing interior of haemal valve some- 

 what enlarged. T. septentrionalis Couthouy (see plate Ixix) appears to 

 be an American race of this species. 



2. The same, showing soft parts. 



3. Platidia aeminula Philippi (P. anomioides Scacchi); interior of haemal valve, 



much enlarged. 



4. The same, showing soft parts ; 4.5. 



5. Yoldia limatula Say, showing animal; -f. 



6. I'araitarte triquelra Conrad; 5.0. Exterior. 



7. The same, interior of right valve. 



8. Thf.sauie, interior of left valve. 



9. Mya arenaria Linne" with the left valve, and mantle-lobe and part of the 



siphons removed, showing anatomical features: a, anterior adductor 

 muscle; a' posterior adductor; b, visceral mass or body: cl, cloaca; e, 

 epidermis of siphons; /, foot; g, gills; h, heart; m, cut edge of the man- 

 tle; o, mouth; 8, s', siphons; t, labial palpi; v, vent; w, the uinbo of the 

 shell; p. o., pedal orifice of the mantle; r, rectum. From a drawing by 

 Miss Hume. 



10. Lyonsia hyalina Conrad, showing animal extended. 



11. Theciditim mediterraneum Sowerby ; 5.5; interior of hu'.uial valve showing 



soft parts. 



Figure 10 is loaned by the U. S. Fish Commission. Figures 6, 7, and 8 are taken 

 from the Proceedings of the U. S. National Museum. The others are from the British 

 Museum series, and were loaned by the Smithsonian Institution. 



24781 Bull. 37 13 



