CULTELLUS. 



(Fig. .s.) .Specius L>il. (Mus. Brit.) 



Cci.TKi.LUS COSTATUS. CiiL tcsti't. mcifjiiM, vealrirosd, 

 obliiptd,propS umhoncs aurantia, purpurco nchulata, 

 eiddennide fiisco suhviridi nileiiti indiiia, intus 

 iiifrd ■timhonerii imicoslatd ; latere anlico brevi, sub- 

 votundata ; latere postico elomjato, Iiianti, injlato, 

 marffine dorsall hrevi, subcxcavato ; cardiiie vukjiio, 

 iiiiirijiiu latcrali sttprd declivi, iiifrd rotnndatim 

 prodncto. 



Thi; niKEED CuLTELLL's. Shell largo, voutricose, ob- 

 lique, orange near the umboes, clouJeii witli 

 purple ; covered with a greenish-brown, shining 

 epidermis ; with a rib inside under the umbo ; 

 anterior side short, rather rounded ; posterior side 

 elongated, gaping, inilated, dorsal margin short, 

 slightly excavated: hinge large, lateral margin 

 sloped above, roundly produced below. 



S.w. American Marine Conohology. 



Hab. North America, Cape Kriisenstern. 



(Fig. 9.) Species:.']. (Mus. lirit.) 



Cl'I.TKl.LUS MEDIfS. CiiL tCftd t:idici'iiipre.^f''i, oblniir/a- 

 i Uiptifd.iitrinqucliianti, cpuknnidc a'ltsso, .'ndjriridi, 

 nib nti iuduti'i ; intus cosld ralidd inj'rd umhonem 

 iitvd<iae ridrdmunitd, latero untico breri, semiornld ; 

 latere postico oblongo, margine dorsali nxtluKcul) ; 

 mar;/ine terminali subtruncato, marjinc ventndi 

 convexo, ad tcrmiuum siirsum (in-livi. 



The medium Cultellus. Shell ratlier compressed, 

 oblong-elliptical, gaping at each end, covered with 

 a thick, greenish, shining epidermis ; fortified 

 within by a strong rib under the umbo in each 

 valve : anterior side short, semi-ovate ; posterior 

 side oblong, dorsal margin rather straight; 

 terminal margin rather truncated, ventral margin 

 convex, sloped upwards at the end. 



Gi;.\Y. Zool. Beechy Voy., PL 44, f. 2. 



Machicrh, idtida. GoulJ 

 H<di. Xorth America. 



Species 10. (Mus. Brit.) 



Cl-ltellus Wintei;i.v.\us. Cal. tcatd ohhngd, sabovatd, 

 di'pressd subcivraleo-alhd, epidernude tenui iiidutd, 

 intus costd validd infra umboiiem ulrdrpie vulva 

 munitd, latere, antico brevi, altd, sabrotundd, 

 murgim dorsali declivi; latere jwfitico subattinuato, 

 ad tcrmiaum suhanuninato, margin-: ventral/ rectiiis- 

 ctilo. 



WiNTEu'.s Cl-etellis. Shell oblong, rather ovate, de- 

 pressed, bluish-white ; covered with a thin epi- 

 dermis, fortitied inside with a strong rib under 

 the umbo in each valve ; anterior side short, 

 high, rather rounded, dorsal margin sloped : 

 posterior side a little attenuated, rather aciuni- 

 nated at the end, ventral margin rather straight. 



DcNKEK. Free. Zool. ^oe., 18&1. -^ /,':.' ^, «. U r ^ ^ 



Hab. Java. 



Tliis species has a little of the shape of a Donax. 



Species 11. (Mus. Brit.) 



Cl'LTELLUs Nutt.\li. Cul. testd maijnd, ellipticd, coni- 

 pressd ; albidd, jiw'pureo ah nmbonibus radiatd ; 

 epidermide crasso, nitenti indutd, intus costd. validd 

 munitd ; latere antico breviitsculo, sidiacwninato ; 

 latere jmstico elongato, ad terminum subtruncato. 



Nittal's Cultellus. Shell large, elliptic, compressed ; 

 whitish, rayed with purple from the umboes, 

 covered with a thick shining epidermis, fortified 

 inside with a strong rib ; anterior side rather 

 short, rather acuminated ; posterior side elongated, 

 rather truncated at the end. 



CoxuAD. Journ. Acad. Nat. Hist. Phil., v. 7. 



Ilab. North America. 



