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



Family Trochidae. 



4. Solariella metallica, sp. n. 



A brilliantly nacreous species, ornamented with two spiral 

 rows of conical tubercles and four sraootli carinai on the base, 

 exclusive of a faintly granulated one which bounds the um- 

 bilicus. From 73y fathoms in the Gulf of Manaar (Station 

 109). The glistening metallic lustre of the whole exterior is 

 largely though not entirely due to the erosion of the delicate 

 external layer of the shell. 



Fvr. 12. 



Solariella metallica. — a, from the front ; b, from the base. Natiu-al size. 



Family StrombidaB. 



5. RostelJaria delicatula^ Nevill. 



Rostellaria delicatula, Nevill, Jovu'n. As. Soc. Beng. vol. 1. (18S1) pt. 2, 

 p. 262 ; Wood-Mason and Alcock, Anu. & Mag. Nat. Hist. (6) vii. 

 p. 16. 



Many specimens in various stages of growth from Station 

 119, 95 fathoms. 



This form, already noticed to be characteristic of the Bay 

 of Bengal infra-littoral at and near the 100-fathom contour 

 from Arrakan to the Godiivari, is now found oti' the Kistna 

 Delta, about seventy miles further south. 



Family Pleurotomidae. 



G. ricurotoma si/mhiotea, sp. n. 



Two living specimens from the Laccadive Sea, 1043 

 fathoms (Station 108). 



They were encrusted all over with an Epizoanthua. 



The shell is remarkable for its peculiar glistening white 



