A S T A R T E. 



Species 17. (Fig. a, b, Mns. Brit.) 



AsTAiiTi: FUSCA. Ast. testa suborbiculari, craxsa, cas- 

 tancA, rubra obscure radiatd, propi nmboncs coii- 

 centrice, crebre et concinne liratd ; umbonihus subter- 

 minalibus ; latere antico hrevissimo ; margine ven- 

 trali rotundato, manjine postico-termindli sub 

 truncato. 



The ishown Astaute. Shell rather orbicular, thick, 

 chestnut, obscurely rayed with red, concentrically, 

 closely, and neatly ridged near the uniboes; 

 umboes nearly terminal ; anterior side very short ; 

 ventral margin rounded, posterior terminal margin 

 slightly truncated. 



PoLi (Tellina). Test. Sic. Tab. 15, f. 22, 23. 



Hcib. Mediterranean. 



Species 18. (Mus. Brit.) 



AsTARTE LACTEA. Ast. testd magna, compressA, ovato- 

 suhtn'gond, epidermide crasso, nigra indutd, prope 

 umbones tcnuiter concenirice Uratu, intus lacted ; 

 latere antico brevi, declivi ; latere postico oblique 

 producto ; margine dorsali declivi, ad termiiium 

 siibtru7icato ; margine interna Icevigato. 



The milk-white Astarte. Shell large, compressed, ovate, 

 subtrigonal, covered witli a tliick black epidermis, 

 finely concentrically ridged near the umboes, milk- 

 white within; anterior side short, sloped; pos- 

 terior side obliquely produced, dorsal margin 

 sloped, somewhat truncated at the end ; inner 

 margin smooth. 

 Broderip. Zoological Journal, vol. iv. p. 356. 

 Hab. North Europe. 



The wrinkles, although fine and distinct near the 

 umboes, are continued a very little way from them in 

 most specimens. 



Species 10. (Mus. Brit.) 



Astaute producta. Ast. testa oblongo-ovatd, compressd, 

 ail umbones, etfere ad medium tenuiter et regulariter 

 liratd, versus marginem loivigatd ; latere antico 

 pauld producto ; latere postico elongato, ad termi- 

 num suhacuminato ; margine dorsali leviter declivi ; 

 margine intemo lavigato. 



The produced xYstakte. Shell oblong-ovate, com- 

 pressed, finely and regularly ridged at the um- 

 boes and nearly as fiir as the middle, smooth to- 

 wards the margin ; anterior side a little produced ; 

 posterior side elongated, rather acuminated at the 

 end ; dorsal margin slightly sloped ; inner margin 

 smooth. 



SdWERBV. 



Ilab. North Europe. 



The difference between this species and Astarte lactea 

 is the same as that which causes Ast. elliptica to be 

 separated from Ast. sulcata, namely, a prolongation 

 in form. 



Species 20. (Mus. Brit.) 



Astarte subtrigona. Ast. testd crassd, subtrigoiid, 

 epidermide castaneo indutd, intils ad marginem 

 lavi, versiis umbones et ad medium subirregulariter 

 liratd, medio ad marginem lavi ; latere antico 

 tumido, suhrotundo ; latere postico angulato, ante 

 unguium compresso ; margine dorsali valde declivi. 



TuE subtrigonal Astarte. Shell thick, subtrigonal,, 

 covered with a chestnut epidermis, smooth at the 

 margin wthin, rather irregularly ridged towards 

 lunboes and to the middle, from the middle to the 

 smooth ; anterior side tumid, rather 



November, 1874. 



