On Mollusca from the Bay of Bengal &c. 453 



The penultimate whorl of duplicatus is wider in proportion 

 to the last whorl than in Syleesi; the latter is also distinguished 

 by its prominent inner basal ridge at the umbilical area. 



Cataulus marginatus, Pf., var. crenulata, nov. 



Slightly broader than typical marginatus, less strongly 

 malleated, and lacking the distinctly margined suture of that 

 species ; of a light reddish colour, and crenulated at and below 

 the suture of the middle whorls, the antepenultimate showing 

 it more distinctly. 



Maj. diam. 6 ; alt. 15 mm. 



Log. Ceylon. 



Cataulus Nevilli, Sykes, yciv.jlaveolabris, nov. 



Lighter-coloured and with a yellow peristome, the latter 

 being more on a plane with the spire than in typical Nevilli, 

 which is generally somewhat produced forward at the basal 

 portion. 



Maj. diam. 11 ; alt. 25 mm. 



Loc. Ceylon. 



LV. — Natural History Notes from H.M. Indian Marine 

 Survey Steamer ' Investigator/ Commander T. H. Heming, 

 R.N. — Series III., No. 1. On Mollusca from the Bay of 

 Bengal and the Arabian Sea. By Edgar A. Smith, I.S.O. 



[Continued from vol. iv. p. 251.] 



In these ' Annals ' for 1899, vol. iv. pp. 237-251, diagnoses 

 were given of thirty-five new species from the collection 

 about to be described. The publication of such lists as the 

 following are of importance as regards our knowledge of 

 both geographical and bathy metrical distribution. Many of 

 the species were obtained at Stations 229, 232, and 233, the 

 exact positions of which are as follows : — 



Station 229. — Lat. 9° 29' 34/' N., long. 75° 38' E. : 



360 fath. ; green mud. 

 Station 232. — Lat. 7° 17' 30" N., long. 76° 51' E. : 



430 fath.; grey mud. 

 Station 233. — Lat. 13° 17' 15" N., long. 93° 10' E. : 



185 fath. ; sand. 

 Ann. & Mag. N. Hist. Ser. 7. Vol. xiii. 31 



