16 



Messrs. J. Wood-Mason and A. Alcock on 



Fie 



canal, by the umbilicus open to the very apex, and by a 

 supra-sutural band of white glaze 

 left throughout the spire by a por- 

 tion of the callus remaining uncovered 

 during growth. The longitudinal ribs 

 of the shell ai-e obtundate, alter- 

 nately broad and narrow, with finely 

 wrinkled edges, the crenulations 

 being produced at regular intervals 

 to form by their approximation very 

 narrow, decussating, transverse lines. 

 Colour of shell warm cinnamon, with 

 transverse streaks of darker brown 

 corresponding to lines of growth. 

 Colour of the animal delicate pink, 

 the edges of the mantle shading into 

 a lemon-yellow. Three large speci- 

 mens from a sandy bottom in 98 to 

 102 fathoms off the Ganjam coast. 



Family Pleurotomidse. 



2. A single small Pleurotomid was taken from the mud at 

 Station 97, 1310 fathoms. 



Family StrombidaB. 



3. Bostellaria deh'catula, Nevill. (Fig. 3.) 



Rostellaria delicatula, Nevill, Journ. As. Soc. Beng. vol. 1. (1881), 

 pt. ii. p. 262. 



This species has now become recognized as a quite charac- 

 teristic inhabitant of the infra-littoral of the Bay of Bengal 

 at and near the 100-fathom contour, as far as this has yet 

 been explored by the ' Investigator,' from Arrakan to the 

 (jrod^vari. The living animal is a bright pink, and it has 

 imparted to the spirit in which it was preserved a beautiful 

 magenta colour, which has stained permanently the packing- 

 material, the legs and the branchiae of some Penaei, and the 

 soft tissues of a Ch^etopod and of some other mollusks, con- 

 tained in the tin in which it was first placed. The eyes are 

 very large. The animal is possessed of great vitality, and, 

 though coming from a considerable depth, lives happily for 

 days in a bucket of sea- water, and appears to be unaffected by 



