1896.] A. R. S. Anderson — Deep Sea Crustacea. y 7 



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

 at once serves to distinguish Nephropsis suhmi from the other three 

 Indian species of this genus, atlantica, steivarti 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 Callianassidae. 



Calocaris, Bell. 



31. Calocaris macandreae, Bell. 



Alcock and Anderson, J. A. S. B., Vol. LXIIL, 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 Axiidae. 



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 smallgranules, 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 merus of the great chelipeds is armed 

 J. n. 13 



