A S T A R T E. 



Plate II. 



Species 8. (Mus. Rrit.) 



AsTARTK QUAM'.ANS. Ast. testd qiiadrato-suhtricjonA, 

 compressd, altd, mhmquilaterali, Unniusculd, teimiler 

 striatd ; latere, antico brcviori ; latere postico 

 oblique (leelivi, (vl termi/mm suhtruncato ; margine 

 intenio Imvtgato. 



The quadrate Astarte. Shell rather sqiiare, sub- 

 trigona!, compressed, elevated, rather equilateral, 

 rather thin, finely striated ; anterior side rather the 

 shorter ; posterior side obliquely sloped, some- 

 what truncated at the end ; inner margin smooth. 



Goi-LD. Inverfebrata of Massachusetts, p. 81, f. 48. 



Hub. North America. 



Species 9. (P'ig. «, b, Mus. Brit.) 



AsTAETE CRENWTA. Ast. testd ovatd, injlatd, temiiuaciM, 

 antice usque ad medium concentrice tenuiter liratd, 

 postici Icevigatd; epidemiide tenui, Jlavidd ; cardine 

 angusto ; margine ventrali intus creMito. 



The crenated Astarte. Shell ovate, inflated, rather 

 thin anteriorly, as far as the middle concentrically 

 finely ridged, posteriorly smooth ; epidermis thin, 

 yellowish; liinge narrow; ventral margin crenated 

 within. 



Gray. Brit. Mus. 



Astarte oblonga, Sowerby. 



Hab. ? 



On careful examination I am able to identify the 



shell I called Astarte oblonga, with the specimens of 



Dr. Gray's A. crcnata. The latter are younger shells. 



Species 10. (]Mus. Brit.) 



The CLosE-RinBED A.starte. Shell ovato-sulitrigmval, 

 compressed; concentric ribs numerous, crowded, 

 disappearing behind the posterior angle ; anterior 

 side rounded, rather short ; posterior side pro- 

 duced, angular, smooth and flat behind the angle; 

 dorsal margin obli(iuely sloped, truncated at the 

 end. 



Forbes. Ann. Nat. Hist., vol. xix. p. 98. 



Hab. North Britain. 



The early figures of this shell were taken from one 

 or two dead specimens deprived of their epidermis. 

 There are now fresh specimens in the British Museum. 



Species 11. (Mus. Brit.) 



Astarte undata. Ast. testd ovnto-snbtrigond, altd ; 

 rugis conceiitricis magnis, distantibus, post unguium 

 posticum subobsoletis ; vmbonibus acuminatis ; latere 

 antico brevi ; latere postico oblique producto ; 

 margine interna crenulato. 



The waved Astarte. Shell ovate-subtrigonal, elevated ; 

 concentric wrinkles large, distant, rather obsolete 

 behind the posterior angle ; umboes acuminated, 

 anterior side short; posterior side obliquely 

 produced ; inner margin crenulated. 



Gould. Invertebrata of Massachusetts. 



Astni-ie latisulca, Hanley. 



Hab. North America. 



Normally a more trigonal or sloping shell than 



Astarte sulcata, with the riljs far more strong and 



distant. 



Species 12. (Mus. Hanley.) 



Astarte crebricostata. Ast. testd ovato-subtrigond, Astarte semisulcata. Ast. testd oblonga, subcompressd, 



compressd; costis concentricis numerosis, erebris,post 

 angidum posticum evanidis ; latere antico rotundo, 

 hreviusculo ; latere postico 2^>'od''iCto, angulato, 

 post angulum lavigato, planato ; margine dorsali 

 oblique declivi, ad terminum Iruncato. 



versits umbones tenuiter rugatd ; latere antico 

 breviusculo, margine dorsali prope umbones e.rcavato; 

 latere postico producto, ad terminum truncato, 

 margine dorsali rectiusculo. 

 The half-grooved Astarte. Shell oblong, suboom- 



November, 187i. 



