878 MR. A. GARRETT ON NEW SHELLS. [Dec. 3, 



copied from the edges, which were closely cut to reduce the paper to 

 the size of the other drawings : " Cyprinus sarana, Buchan. Asiat. 

 Research, xix. t. 41. x." From this we learn that the drawing is 

 undoubtedly one of Buchanan's, that M'Clelland copied it with the 

 intention of publishing it in his " Indian Cyprinidae " in vol. xix. of 

 the 'Asiatic Researches,' that, for some reason or other, he either 

 cancelled it or inadvertently omitted it ; this would partly account 

 for the series of discrepancies between the numbers on the plates and 

 the references in the text, which begin with pi. 41. 



I have inserted the tracing sent by Mr. Wood-Mason, as well as 

 the proof of M'Clelland's drawing in the copy of M'Clelland's " In- 

 dian Cyprinidae," belonging to the Library of the Zoological De- 

 partment of the British Museum, so that they may be consulted by 

 any one who is compelled to investigate the history of this species. 



6. Description of a new Species of Scissurella from the 

 Panmotu Islands. By Andrew Garrett, of Tahiti. 



[Eeceived August 12, 1872.] 



Scissurella paumotuensis. 



Shell umbilicate, depressedly suborbicular, thin, vitreous, pellucid, 

 white ; spire very slightly elevated ; whorls 2g, strongly keeled, 

 the last constricted beneath the keel, longitudinally ribbed ; ribs 

 small, rather distant, obliquely curved, smaller, more complex and 

 flexuous above, decussated with very fine crisp-like spiral lines ; 

 fissure linear, a little back from the margin of the lip ; umbilicus 

 large, deep, and somewhat angulated on the margin; aperture sub- 

 circular ; outer lip very oblique, sharp, entire, and rounded ; colu- 

 mella thin and slightly arched. 



Height 1^ mill., diam. 2 mill. 



Hab. Paumotu Islands. 



This is no doubt the first indication of the genus Scissurella 

 inhabiting the Polynesian seas. In shape and position the fissure is 

 precisely like that in the genus Trochotoma. 



7. Descriptions of two new Species of Separatista. 

 By Andrew Garrett, of Tahiti. 

 [Received August 12, 1872.] 

 Separatista quadricarinata. 



Shell small, turbinate, subrhomboidal, obsoletely polygonal, rather 

 thin, pale yellowish horn-colour ; spire conical, a little more than 

 half the length of the shell ; whorls 5|, prominently angular, the 

 last ventricose, spirally keeled ; keels angularly rounded, the lower 

 one encircling the umbilicus, three contiguous ones on the middle of 

 the body-whorl, of which two traverse the lower half of the whorls 

 of the spire ; aperture large, semicircular, slightly effuse at the 

 termination of the basal keel ; outer lip thin, roundly arched, 



