MAZATLAN TNIVALVES 225 



zebrina, D'Orb. 1842, B. M. Cat. Cuba. Moll. p. 23, no. 256. 

 (Jamaica, C. B. Adams ; Guadaloupe, 2>' Orhiqny ; Cuba, 

 Saffra.J 



This beaut ifid sliell closely resembles tbe W. Indian species. 

 Like many of its congeners, it bas parallel diagonal lines of 

 colour ; and is also variously and most beautifully stained with 

 red and brown. The first whirl of the five is discoidal. It is 

 characterized by extremelj" minute wrinkling over the whole 

 surface, onlj^ discernible imder the microscope, when quite 

 fresh. The umbilicus is very large when young, and sharply 

 keeled : when adult, it is often nearly fiUed up by the callous 

 labium. Operculum radiately wrinkled over a large part of 

 the outer surface ; within, spire produced, sharply keeled. The 

 largest specimen measures lone/. "IS, lat. "12, div. 70". 



The smaUest sp. „ „ '032, „ -037, „ 90". 



Hah. — Payta, Panama, ^. B. PhiUppi. — Mazatlan ; 12 sp. 



among algse, on Uvanilla oUvaeea, &c. ; L'pool Col. 



Tablet 108 i contains 5 specimens shewing the principal 

 varieties of colour, red, ashy and mottled, the largest of which 

 has its operculum in situ ; also 2 separate opercula. 



283 h. Phasianeila ? peefoeata, var. steiulata. 



P. t. " P.pcrforatce" simili, sed lineis coloris carente ; rvfo 

 punctata et varie maculatd ; striis spiraUbiis intus timbilicimi 

 et in basim, nonnunquam supra spiram. 



Only two dead shells having been found agreeing in the 

 above characters, their specific value cannot be tested. One 

 of the specimens is very slender, tlie other of the ordinary 

 form. There is no trace of the minutely wrinkled surface. 

 Long. -09, lat. "07, div. 50». 



^w/a— Mazatlan ; 2 sp. in shell washings ; L'pool Col. 



Tablet 1085 contains the slender specimen. 



28i. Phasianella compta, Gould, ms. 



''Ph. t. parvu, solidd, ovato-conicd, imperforata, politd, cin- 

 er ascent e, lineis minuiis olivaeeis, oblique volventibus, ornatd ; 

 anfractihus iv. [v.] rotundatis, ultimo ad peripheriam snhangu- 

 lato, et interdiint tesscllatim fasciato ; aperfurd oireulari ; 

 labro temd, albo ; columella planulatd, albd ; faucibiis callo 

 incrassatis." 



