MARINE MOLLUSKS OF THE SOUTH-EASTERN COAST. 193 



PLATE XLVIII. 



Fig. 1. DrilUa thcaDaU; lo.O. 



2. Oscilla nivea Morcli ; 8.5. 



^. Maiifjilia limonilella Dall ; 6.75. 



4. Turbonilla {Parlheiiia) cedrosa Dall ; 5.5. The aporturo is a little brokt'ii. 



5. Mitrajloridana DaW; CO. 



G. /'/(OS parvus Ads. var. inirkalus Dall ; 13.2. 



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



paired after fracture. 



8. Teeth o( Cupaht-s hiuigariciis JA\in6, much enlarged. 



9. Sipho 2)!j(jina'us Gould, showing soft parts. 



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



larged. Capo Cod northward, West America, Arctic Si^as. 



11. Liostraca UempliiUii Dall ; 3.0. 



12. Crcpidula (Jaiiacns) nnguiformis Lamarck, dentition much enlarged. 



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



14. Limaciiia helicinaFhipps; dentition, enlarged. 



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



rett; 4.0. 

 1(). Crepidula fornicafa 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 1).\ 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 jhe IJiiiLsii 

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



PLATE XLIX. 



Fig. 1. Terehralulina caputserpenlis Linn(5, showing interior of haemal valve some- 

 what enlarged. T. septentrionalis Couthouy (see plate L\ix) appears to 

 be an American race of this species. 



2. The same, showing soft parts. 



3. Platidia semhntla Philippi (P. anomioidcs Scacchi); interior of hajmal valve, 



much enlarged. 



4. The same, showing soft parts; 4.5. 



5. ro?rfirt /t»irt/H/a Say, showing animal; \. 



6. rara«/a)-^c /r((/«e^j-a Conrad; 5.0. Exterior. 



7. The same, interior of right A-alve. 



8. The same, interior of left valve. 



9. Mya arenaria Linn6 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; c, 

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

 tle; 0, mouth; s, «', siphons; t, labial palpi; v, vent; u, the umbo of the 

 shell; p. 0., pedal orifice of the mantle; r, rectum. From a drawing l>y 

 Miss Hume. 



10. Lyonsia hyalina Conrad, showing animal extended. 



11. Thecidium mcditerranciim Sowerbj' ; 5.5; interior of h;cmal 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 Sinithsoniau Institution. 



24781— Bull. 37 13 



