914 mr. g. p. angas on australian mollusca. [nov. 28, 



12. Anatina prolongata. 



Anatina prolongata, Reeve, Conch. Icon. Anatina, pi. 4. f. 28. 



A thin narrow species, with the valves produced posteriorly and 

 ridged throughout. Dredged in sandy mud near Spectacle Island, 

 Parramatta River. Length 9 lines. 



13. *Alicia angustata.' 



Alicia angustata, Angas, antea, p. 908, PI. xliv. f. 1. 



In this genus the ossicle is large and triangular as in Lyonsia ; but 

 the cartilage is not supported by projecting spoon-shaped processes, 

 and is perpendicular to the umbones. The shells externally some- 

 what resemble ^en/jZoma, and are thin, white, and abruptly truncate 

 at the posterior side. Dredged inside South Head reef. Length 

 65 lines. 



14. * Alicia elegantula. 



Alicia elegantula, Angas, antea, p. 908, PI. xliv. f. 2. 



More rounded than the preceding species, with the umbones more 

 central. Dredged between Watson's Bay and the " Sow and Pigs " 

 reef. Length 5g lines. 



15. ThRACIA ANATINOIDES. 



Thracia anatindides. Reeve, Conch. Icon. Thracia, pi. 3. f. 12. 

 Roundly ovate, thin, and convex, shortly angled posteriorly, and 

 broadly rounded in front. Dredged in Port Jackson. Length 1 inch. 



16. Thracia australica. 



Thracia australica, Reeve, Conch. Icon. Thracia, pi. 3. f. 13. 

 A somewhat depressed species, with the aspect of a periploma. 

 Dredged in Port Jackson. Length 9 lines. 



17. *Thracia modesta. 



Thracia modesta, Angas, anteh, p. 908, PI. xliv. f. 3. 



A small ovate species, with the posterior side very obliquely trun- 

 cate. Dredged off Ball's Head, Port Jackson, in 15 fathoms. 

 Length 7 lines. 



18. NejEra (Rhinomya) rugata. 



Rhinomya rugata, A. Ad. Ann. & Mag. Nat. Hist. 3rd ser. vol. xiii. 

 p. 207. 



An elegant little shell, largely rostrate, and concentrically ridged 

 throughout. Dredged at the " Sow and Pigs" reef. Length 3| lines. 

 The type specimen of this species was dredged by Mr. A. Adams at 

 Tabu Sima, in Japan. 



19. Theora nitida. 



Theora nitida, Gould, 'Otia,' p. 162. 



A thin, hyaline shell, with the valves attenuate posteriorly ; the 



