obtained in the Indian Sens. 235 



The sixth abdominal segment is not twice the length of 

 the fifth. Exopodites are not present on any of the legs. 

 Epipodites are absent from the external maxillipcds as well 

 as from the last tiiree pairs of legs. There are no pleuro- 

 branchise on the last two thoracic segments. 



Bexthesicymus, Spence Bate. 



Benthesicymus armatus, sp. n. 



In the general form, cut, and outline of rostrum and 

 carapace this species resembles B. brasiliensis (Sp. Bate), 

 but in the former there is a distinct hepatic spine as in 

 B. moraivs (S. I. Smith, Alb. Crust. 1886, p. 90). 



With B. moratus this species is very closely allied. They 

 differ only in the following points : — B. moratus has a sharp 

 tooth posteriorly on the carina of the dorsum of the third, 

 fourth, and fifth abdominal segments ; its third abdominal 

 segment is carinated ; its sixth abdominal segment is more 

 than twice as long as high ; its antennal scale is relatively 

 narrower, and the rostrum — ^judging from the description — 

 is not raised so much at the base as in this species. 



The rostrum is long, reaching the tips of the eyes, and is 

 dorsally armed with two small teeth. Between the crest of 

 the rostrum and the cervical groove the median carina is 

 very prominent ; beliind this it is distinct, though less 

 prominent, to very nearly the posterior margin of the carapace. 

 The post-antennular angular projection of the carapace ends 

 acutely anteriorly, and from this lobe a crest passes back- 

 wards ill the direction of tlie hepatic spine. The branchio- 

 stegal spine, which is placed well back on the margin of the 

 antero-lateral sinus, is larger than the hepatic spine and is 

 well buttressed posteriorly. The carapace is deep, as in 

 B. brasiliensis. 



The eyes are in a bad state of preservation ; they seem to 

 be deficient in pigment. 



The antennular peduncles reach about half\vay along the 

 antennal scales. The antennal scales are broad, being only 

 about 2^ times as long as broad. 



The last joint of the endopodite of the first maxilliped 

 is \-\ as long as the penultimate joint, and the distal 

 extremity of the exopodite suddenly ends in a flagellum. 

 The second and third maxiilipeds agree in all details with 

 the description and plates of J3. moratus [loc. cit.). 



The bianchial furmula is typical of Benthesicymus (Alcock, 

 Desc. Cat. Ind. Deep-sea Crust. 1901, p. 43). Kudiinentary 

 exopodites are present on all the legs. 



17* 



