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PAPERS READ. 



NOTE ON COLINA BRAZIERI, TRYON. 

 By Professor R. Tate. 



The above-named gastropoclous shell is described in Tryon's 

 Manual of Conchology, Vol. ix. p. 142, and illustrated, t. 26, 

 fig. 16. The occurrence of Colina in the Eocene beds of Victoria 

 has led me to a study of the recent species, and in doing so I was 

 arrested by the unlikeness of Tryon's figure, as above quoted, to 

 other members of the genus ; moreover, the shell seemed familiar 

 to me, and if I am right in my identification it is nothing more 

 than the embryo of Fusus p7'oboscidife7'its, of which I have 

 examples from Port Essington. The apical whorls of that shell 

 are often decollated, but in some specimens there remains sufficient 

 of the apex to permit one to arrive at the opuiioii just stated. 



Tryon says of it — " An aberrant form almost deserving to be 

 made the type of a new group. The extreme fragility and form 

 of the mouth indicate juvenility. Mr. Brazier sent us several 

 specimens which all exhibit the above [diagnostic] characters." 



Colina, classed by Tryon and Fischer as a section of Cerithinm, 

 is most related to Lovenella, as indicated by Cossmann, Coq. Foss. 

 de I'Eocene de Paris, 1889, which the same authors make a section 

 of Cerithioj)sis ; indeed, specimens of fossil species, under exami- 

 nation, with an incomplete aperture are only distinguishable 

 from Lovenella by the absence of that abrupt twist of the 

 columella which characterises that genus, and in this state is 

 simulated by Colina Brazieri. 



