456 Mr. E. A. Smith on Mollusca from ih-e, 



Pleurotoma vagata, Smith. 



Pleurotoma vagata, Smith, Ann. & Mag. Nat. Hist. 1895, vol. xvi. 

 p. 3, pi. i. fig. 3. 



Hab. Station 233, off Andaman Islands, in 185 fath. j also 

 Station 229, off the Travancore coast, in 360 fath. 



The specimens from the first locality agree in every respect 

 with the unique type from 200-350 fath. off Triucomalee. 

 The infrasutural keel is generally somewhat reddish, and the 

 central carina is spotted with the same colour between the 

 tubercles, which in some specimens become obsolete upon 

 the body-whorl. The concavity of the upper part of the 

 whorls becomes more obvious as the shell increases, so that 

 it forms a deep channel upon the body-whorl in some speci- 

 mens. In the shells from off the Travancore coast the keel 

 at the suture is much more feeble than in the typical form. 



Pleurotoma congener, Smith. 



Pleurotoma congener, Smith, Ann. & Mag. Nat. Hist. 1894, vol. xiv. 

 p. 100, pi. iii. figs. 4, 5. 



Hab. Station 229, off Travancore coast, in 360 fath. j also 

 Station 233, off Andaman Islands, in 185 fath. 



The specimens obtained off the Travancore coast are 

 longer and narrower than the typical form, with a narrower 

 tuberculated band round the middle of the whorls. Five out 

 of the eight specimens examined, all dead and more or less 

 broken, have the peculiar swelling on the upper part of the 

 columella which was mentioned as occurring in some examples 

 obtained off Colombo. The measurements of the largest 

 specimen are : — 



Length 62 mm., diam. 20 ; aperture 20 long, 8 wide. 



Pleurotoma optata, Smith. 



Pleurotoma optata, Smith, Aim. & Mag. Nat. Hist. 1899, vol. iv. 

 p. 238 ; Illust. Zool. ' Investigator,' pi. ix. figs. 1, 1 a. 



Hab. Station 232, off South India, 430 fath. ; and Station 

 229, off Travancore in 360 fath. 



Pleurotoma fusca, Hombron & Jaequinot, var. 



Pleurotoma fusca, H. & J., Voy. Pole Sud, p. Ill, pi. xxv. figs. 19, 20. 



Hab. Station 240, off Andaman Islands, 194 fath. 



Two specimens, paler than the type, almost white, with a 

 slightly shorter anterior canal. PL gemmata, Hinds, may 

 be the same as this species, but the spire seems to be more 



