PLEUROTOMA. 171 



P. SPIRALIS, E. A. Smith. PI. 4, fig. 44. 



Shell fusiform, pallid brown, cingulated with carinae, of wMeh 

 there are about twelve on the body-whorl, subequal, interstices 

 obliquely striate ; aperture narrow, collumella blackish brown ; 

 canal very short ; outer Up thin, with a large sinus. 



L. 11, diam. 3 mill. 



WhydaJi, W. Africa. 



" This species belongs to the same group as P. violacea, 

 Hinds." Does it differ from the West African P. filosa of the 

 same author ? 



P. VALLATA, Gould. 



Shell small, lanceolate, lurid, with ten shouldered and carinate 

 whorls, with elevated revolving lines of which there are ten or 

 twelve on the body-whorl ; aperture one-third the total length 

 of the shell, narrow ; outer lip with a profound, wide sinus ; 

 columella smooth. L. 9, diain. 3 mill. 



Near Hong Kong, 10 fathoms, shelly mud (Stimpson). 



Unfigured. Said to be allied to P. violacea, and described as 

 a Drillia. 



P. RECIPROCA, Gould. 



Shell small, lanceolate, with ten slightly convex whorls bear- 

 ing revolving carinae, of which there are 4-5 on the spire-whorls, 

 and 10-12 on the body-whorl; middle carina stronger, inter- 

 spaces clathrate ; aperture one-fourth the total length, the sinus 

 broad and deep ; the canal short, wide and twisted. 



L. 12, diam. 4 mill. 



Ousima (Stimpson). 



Much like the preceding ; but the color and relative size of 

 carinae are different. Unfigured, and unseen by me. 



P. JUBATA, Hinds. PL 4, fig. 46. 



Whorls with several keels, of which the middle one is the 

 largest, with a beaded row of granules immediately over it ; 

 yellowish brown. L. 25, diam. 11 mill. 



Malacca, China, Australia. 



P.acutigemmata, 1 ^. A. Smith, is an unfigured species, locality 

 unknown. The describer says : " It is with considerable hesita- 

 tion that I apply a name to this form, on account of its close 



