OF CONCHOLOGY. 



105 



BoRSONIA RUGOSA, Migh. 



1845. Pleurotoma rugosa, Migh., Proc. Boston Soc. p. 23. 



Clathurella pumila, Migh. 



1845. Pleurotoma pumila, Migh., Proc Boston Soc. p. 23. 

 1857. " reticulata, Grarr., Proc. Calif. Acad., p. 102. 



Clathurella tincta, Rve. 



1846. Pleurotoma tincta, Rve., Conch. Icon., sp. 347. 



" " albifuniculata, Rve., Conch. Icon., sp. 350. 



We have three varieties of this species from Tahiti and the 

 Paumotus. 



Cythara Garrettii, Pse. 



This species should be compared with Columbella lachryma, 

 Gask., Conch. Icon., sp. 125. 



Cythara angiostoma, Pse. 



1843. Pleurotoma triticea, Rve. non Kien. 



Mr. Reeve has confounded the above Polynesian form with 

 triticea, Kien. Dr. Carpenter, (British Assoc. Report, 1863, p. 

 573,) supposes the latter to be Cythara stromboides, Val., of 

 which I can find no description. Pleurotoma stromboides, Sow. 

 and Rve., is widely distinct. It is possible that P. coronata, 

 Mighels, Proc. Boston Soc, 1845, p. 23, may be intended for 

 this species. If so, the description requires to be very much 

 modified. The transverse strise are distinct and it is also marked 

 with very fine irregular longitudinal striae. Both inner and 

 outer lips are strongly corrugate. A single broad brown band 

 crosses the back of last whorl ; when worn, it appears as a spot, 

 as described by Reeve. The figure in Conch. Icon, will serve 

 to identify the species, though a poor one. 



Cythara D^dalea, Pse. 



1867. Am. Jour, of Conch., p. 218, pi. 15, fig. 13. 

 Name pre-occupied, changed to 0. debilis, Pse. 



Drillia modesta, Sow. 



1833. Pleurotoma modesta, Sow., Proc. Zool. Soc. London, p. 



136. 



We hold the above to be distinct from P. cincta Lam., with 



which it has been connected by Mr. Reeve. The latter, an East 



Indian form, is abbreviate, stout, canal very short, and whorls 



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