16 STUDIES ON AUSTRALIAN iMOLLUSCA, 



Aplustrum brazieri, Angas. 



Dlaphana brazieri, Angas, Proc. Zool. Soc. 1877, pp. 175, 189, 

 pl.xxvi., f. 20. 



(Plate iii., fig. .36.) 



A specimen specifically identified by Mr. Brazier is here figured. 

 It is 4 mm. in length and was obtained in sand}'- mud off Watson's 

 Bay in 10 fathoms— a few hundred yards from where the same 

 collector found the type. If Mr. Brazier's determination is 

 correct, which T have no reason to doubt, then Ano^as' fio^ure is 

 extremely bad. Moreover, I conclude that the species is wrongly 

 placed in Diaphana, and should be transferred to Aplustrum. 

 Pilsbry, who remarked how ill the species agreed with Diaphana, 

 created a section Austro-Jiiaphaiia for its reception,* which might 

 rank as a subgenus of Aplustrum. A large example of this species, 

 which I have examined reached a length of 5 mm. 



Claxculus denticulatus, Gray. 



Gra}' in King's Survey of the Intertropical and Western Coasts. 

 of Australia, ii., 1827, Appendix, p. 479. 



By modern wi-iters this has been treated as a lost species 

 Specimens were taken at Geraldton, W.A., by Mr. A. U. Henix 

 which I recognised as the shell described by Menkef as Monodonta 

 lupina, and afterwards illustrated by Philippi.| Menke, who. 

 doubtless had good grounds for the belief, ultimately considered^ 

 that his species was identical with Gray's Monodonta denticulata. 

 This withdrawal of his species escaped the notice of Prof. Tate|| 

 in his revision of Menke's shells. Trochus atropurpureus, Gould, 

 and T. samoensis, Hombron k Jacquinot, appear to be synonyms, 

 of Gray's species. 



* Pilsbry, Man. Conch, xv., 1893, p. 287. 



t Menke, Moll. X. Holl. Spec. 1848, p. 15. 



:;: Philippi, Conch. Cab. Bd. ii., Abth. 3, 1846, p. 237, pi. 30, f. 3, 



§ Menke, Zeit. fiir Malak. 1844, p. 58. 



II Tate, P.L.S.X.S.W., vi., 1881, p. 393. 



