168 PLEUROTOMA. 



P. CRYPTORRAPHE, Sowb. PL 3, figs. 30, 31. 



Yellowish brown to chestnut-color, with two strong sharp 

 keels, and smaller revolving lines, aperture frequently tinged 

 with purple. L. 70, diam. 18 mill. Philippines, Moluccas. 



It is the PL bicarinatus of Wood, and P. Woodii of Kiener 

 (fig. 31). P. elongata, Gray, is possibly the same. 



P. YIRGO, Lamarck. PI. 3, fig. 32 ; PI. 4, figs. 34, 35, 43. 



Shell ridged and striated, the central ridge forming a carina ; 

 usually glossy white, but when covered by its epidermis corneous. 



L. 100, diam. 28 mill. West Indies. 



The above measurement is from an unusual!} 7 large specimen 

 before me. PL Antillarum, Crosse (fig. 34), and P. Jelskii, 

 Crosse (fig. 35), are younger examples of the same species, the 

 slight variations shown by the figures being connected with the 

 type form by the series of specimens before me. P. Gruneri, 

 Phil. (fig. 43), may also be referred here. 



P. INDICA, Deshayes. PI. 6, figs. 82, 80. 



Shell very like the preceding species, but less distinctly ridged, 

 the shoulder-angle being very slight, and the other revolving 

 ridges very much smaller and closer; 3' r ellowish brown, some- 

 times indistinctly marbled or variegated. L. 80, diam. 22 mill. 



' China. 



With this species I am compelled to unite P. Deshayesii, 

 Doumet (fig. 80 J, as I cannot find any good distinctive characters ; 

 the carinations being merely a little less prominent in the latter. 



Reeve identifies with P. Deshayesii, P. elongata, Gray, a shell 

 described, but not figured, in the Voy. of the Blossom. I can- 

 not agree to this, as the description indicates a shell similar to 

 P. cryptorraphe , Sowb. 



P. OXYTROPIS, Sowb. PL 4, figs. 38, 39, 37. 



Shell horn-colored, with several sharp keels and numerous 

 spiral raised lines, the upper keel the strongest, angulating the 

 whorls, the surface concave above it. L. 45, diam. 16 mill. 



Panama (to Gulf of California], Japan, China. 



P. nobilis, Hinds (fig. 39), and probably the unfigured P. albi- 

 carinata, Sowb., are synonyms. The keels are lighter-colored 

 or nearly white on the top, because denuded of epidermis by 



