80 AMERICAN JOURNAL 



REMARKS ON MARINE GASTEROPODA, INHABITING THE 

 W^EST COAST OF AMERICA ; "WITH DESCRIPTIONS OP 

 T\VO NEW SPECIES. 



BY WM. HARPER PEASE. 

 TORINIA PERSPECTIVIUNCULA, Chem. 



In "Monograph of Solarium," Thes. Conch., three distinct 

 forms of Torinia, inhabiting respectively the W^est Coast of 

 Africa, the Hawaiian Islands, and the East Indies, are united 

 under the above name. Dr. Carpenter, in his last Report on 

 Mollusca of the West Coast of America, adopts the same 

 sjnonomy. 



By comparing a large number of specimens, from various 

 localities, the animals of two of the forms and the operculum of 

 all, I am convinced they are three distinct species, which may 

 be distinguished by the shell as well as the animal. 



I would first observe, that there is more than one species of 

 Torinia inhabiting the West Coast; I refer herewith to that 

 figured in Thes. Con., figs. 61, 62, specimens of which I have 

 received from Margarita Bay, and also La Paz, collected alive, 

 in company with another species, rather smaller and more 

 depressed. 



At the Hawaiian Islands several species remain to be described. 

 I refer to those formerly distributed by me as T. variegata, 

 Chem., and latterly as T. areola, Desh. 



All species of Torinia may be arranged under three distinct 

 shapes. 



1. Trochoidal T. variegata, Chem., &c. 



2. Conoidal T. cethiop, Mke, &c. 



3. Planulate T. cylindracea, Chem., &c. 

 Species of all three of the above shapes are included in the 

 synonomy of T. perspecti, &c., Chem., Thes. Con. 



T. planulata, fig. 63, named as a variety, is a distinct species, 

 as the author suggests. I have received several species of this 

 form from different localities in Polynesia : only two, however, 

 in condition for description, viz., T. discoidea, Pse., and T. siil- 

 cifera, Pse. 



