182 AMERICAN JOURNAL 



Hyria. 5 plates, complete. 



H. exasparata, Sowb. British Guayana. 

 " latialata, " " " 



" rugosissima, " Amazon. 



These are all synonymous with the well-known IT. corrugata. 



H. recta, Sowerby. Hab. — ? 

 " alata, " Guayana. 



These are both synonymous with H. avicularis. 

 Castalia, 3 plates, complete. 



C. Schomhergiana, Sowb. Guayana. 



" Hanhyana, Sowb. Hab. — ? 



" CaroUnensis, Sowb. " South Carolina. But for the 

 localities, this little shell might be thought a young specimen of 

 Castalia retusa." I can assure Mr. Sowerby that if his species 

 was ever in South Carolina it was sent or brought there from 

 the Amazon ; it is nothing but an amhigua. 



C. quadxata, Sowerby. Hab. — ? 

 " cordata, Humphrey, MSS. Guayana. 

 " dolabella, Sowb. Hab. — ? 



Of all these so-called new species the first and last only are 

 in my opinion distinct. 



Proceedings of the Zoological Society. Part 3. London, 1868. 



On Pelagic Shells, collected during a voyage from Vancou- 

 ver s Island to this country. By Commander Hugh 

 H. Knocker. 



lanthina nitida, A. Ad. 



This paper contains tables of latitude and longitude at which 

 the various species were collected. 



ERRATUM. 



In noticing the 2d part of Zool. Proc. for 1868, by one of 

 those errors which are more readily committed than accounted 

 for, I made Mr. Ponton to decide that Oymha patula, Brod., is 

 the young of 0. Neptuni, whereas he stated the former to be dis- 

 tinct. 



