1896.] A. R. S. Anderson — Deep Sea Crustacea. 97 



specimens is there any vestige of a joint in these plates. This character 

 at once serves to distinguish Nephropsis sulimi from the other three 

 Indian species of this genus, atlantica^ stewarti and carpenteri, in all of 

 which the joint is very apparent. Indeed it isolates this species from 

 all other Homarids and forms a connecting link with the nearly allied 

 Eryonidse. 



Colour in life pale orange with a broad whitish stripe on the 

 dorsum of the abdomen and posterior part of the carapace. Antennal 

 bases colourless. Hairs on dactyli of last 4 pereiopods crimson. Cornea 

 opalescent. 



Stations 183, 184, 192, 193, 194 ; 890, 947, 912-931, and 891 fms. 

 respectively. 



Family Callianassidse. 



Calocaris, Bell. 



31, Calocaris macandrese^ Bell. 



Alcock and Anderson, J. A. S. B., Vol. LXIII,, pt. ii., 1894, p. 163, where 

 a list of references is given. 



Three very small specimens, the largest only 24 millims. in length, 

 were captured off the east coast of Ceylon at Station 199, 800-637 

 fms. 



Family Axiidse. 



Calastacus, Faxon. 

 32. Calastacus investigatoris, n. sp. 



Female. This species very closely resembles Calastacus stilirostris^ 

 Faxon, only differing in the following points. The carapace is covered 

 with smairgranules, and dorsally markedly cariuate. The carina extends 

 from the base of the rostrum to within a short distance of the 

 posterior border of the carapace, where it ends in a small denticle. A 

 similar denticle is found on the carina in the centre of the gastric area. 

 The rostrum is triangular and dorsally flattened, its lateral margins 

 extending a short distance back on the sides of the carapace as a pair 

 of elevated ridges each bearing a couple of acute anteriorly directed 

 teeth, the posterior of which is considerably larger than the anterior. 



The eyestalks are short and conical without any trace of a cornea. 



Both the fixed and movable spines of the second joint of the second 

 antennae are very short, only reaching about one-quarter the length 

 of the third joint. 



The upper border of the merns of the great chelipeds is armed 

 J. II. 13 



