124 TJEOMITBA.. 



Dimensions. — Length 18 mm.; breadth 7 mm.; length of 

 aperture 9'5 mm. 



Form, and Loc. — Eocene: Muddy Creek, Victoria. 



G. 4250. Three examples of the adult stage. 



JPresented hy Jolm Dennant, Esq. 



G. 9363. Two specimens. Purchased. 



Genus UHOMITRA, Bellardi. 



[Mem. Eeale Accad. del. Sci. Torino, ser. ii. t. sxxviii. 1887, p. 277.] 



Fusimitra, auct., non Conrad, Proc. Acad. jS'at. Sci. Philad. vol. vii. 

 1855, p. 261. 



Much confusion has arisen, over Conrad's Fusimitra, and it is 

 commonly believed that that author never properly described it. 

 Thus, Tryon^ remarks that Fusimitra is " uncharacterized," 

 and gives the date as 1865, from the "American Journal 

 of Conchology, vol. i. p. 25 " ; he also quotes M. cellulifera, 

 Conrad, in connection therewith. Dr. Paul Fischer'^ gives the 

 same date, and quotes Conrad's species mentioned as the type. 

 M. Cossmann ^ seems to have felt the necessity, under the circum- 

 stances, of putting Fusimitra on a firmer basis, and gives a 

 complete diagnosis of it, also quoting M. cellulifera as the type. 

 Professor Dall* states that Fusimitra "never had any value, 

 and Conrad's original list contained the precursors of species as 

 different as M. wandoensis and M. swainsoni, Brod.," from 

 ■which it is clear that he also accepted the date as 1865; and 

 Dr. Dall further states* that " ilf . cellulifera, Conrad, was the first 

 species " mentioned. 



The modern authors quoted do not appear to have been aware 

 that Conrad' described Fusimitra ten years prior to 1865, and 

 that it is perfectly recognizable. In describing it Conrad says : 

 "Elongate-fusiform, smooth and polished, with impressed revolving 



1 Manual of Conchologv, vol. iv. 1882, pp. 109, 217. 



2 Man. de Conehyl. 1884, p. 613. 



' Ann. Soc. Eoy. Malac. Belg. t. xxiv. 1889, p. 184. 



* Trans. Wagner Free Inst. Sci. Philad. vol. iii. 1890, p. 94. 



5 Proc. Acad. Nat. Sci. Philad. vol. vii. 1855, p. 261. 



I 



