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AMERICAN JOURNAL 



The geographical range of the West Coast and Hawaiian 

 species is limited. Although the East Indian is widey distri- 

 buted from the Red Sea to the Philippines, and from thence 

 through Polynesia to the Paumotus and south to New Caledonia, 

 it retains its characters, which distinguish it from the Hawaiian, 

 and more widely from the West Coast species. The variation at 

 the Paumotus, noticed by Mr. Hanley, is common to the species 

 of several genera, as remarked by me in this Journal, 1868, 

 page 109. 



As to the names by which the several species should be desig- 

 nated, I would first remark, that it is not probable nor possible 

 that Chemnitz ever saw a specimen of Torinia from the West 

 Coast of America. Captain Cook visited the West Coast only 

 on his last voyage, and then at the North-west, the expedition 

 reaching England a sliort time before the date of Chemnitz's 

 publication. He described and figured, without doubt, the East 

 Indian form, although his obscure figures and short description 

 has been and may be referred to several species, as well as those 

 of other early authors. All species of Solarium were classed by 

 them as large or small, or as "perspectives " or "perspectiviun- 

 culus " generically. The specific name of the East Indian 

 species should remain as adopted by Lamarck, Deshayes, and 

 others, T. variegata, which alludes to the disposition of its colors. 

 The Hawaiian species has been recognised by several of my 

 correspondents as T. areola, Desh., which I have adopted, 

 although the description of that species requires to be somewhat 

 modified, especially as to color and its disposition. 



The name of the West Coast species remains to be determined 

 by those more particularly interested in that fauna. 



Trochus Byronianus, Gray. 



Having had opportunity of examining the original figure of 

 the above species in Wood Ind. Test., I discover it to be quite 

 distinct from our common Hawaiian species, Polydonta Sand- 

 ■wichensis, Soul. No species of Omplialius inhabits Polynesia. 

 The above should be connected with some one of the West Coast 

 species. The type, according to Dr. Gray, is awaiting deter- 

 mination in the British Museum. 



COLUMBELLA ROSIDA, RvC. 



The above should be discarded from the West Coast fauna. I 

 have received specimens from its original locality, and several 

 others in Southern Polynesia. For my remarks on its variation, 

 refer to page 122 of this Journal, 1868. 



A number of species, inhabiting the West Coast or the Galla- 

 pagos and Polynesia, have been confounded, for reason of Mr. 



