Indian Deep-sea Dredging. 269 



riiylum APPENDICULATA. 



Branch A K T H R P D A. 

 Class CRUSTACEA. 



By J. Wood-Mason. 



Grade MA LACOSTRACA. 



Order SCHIZOPODA. 



Family Lophogastridae. 



Gnathophausia, Willem.-Suhm. 



1. Gnathophausia bengalensis, sp. n. 



? . Closely allied to G. calcarata^ Sars, from which it 

 differs in the following points : — The carapace covers the 

 whole of the first and a part of the second abdominal somite ; 

 the antennal, branchiostegal, and postero-inferior spines 

 appear quite smooth to the naked eye, being only obsoletely 

 or microscopically serrated, the supraorbital spine is readily 

 distinguishable by its shape from the rostral denticles; the 

 upper lateral keels are strongly roof-shaped, and the oblique 

 subdorsal keels more pronounced ; the antennal scale is more 

 broadly emarginate at the apex ; the pleural lappets of the 

 last abdominal somite are terminated hy two very unequal 

 spines (of which the outer is long and sharp and the inner 

 short and blunt), and are separated from one another poste- 

 riorly in the mid-ventral line by a long and narrow incision. 



Length, from end of rostrum (extreme tip wanting) to apex 

 of telson, 91 millim. ; of carapace, from supraorbital to end 

 of dorsal spine, 37 millim. ; of abdomen 46*5 millim. ; of 

 telson 17'5 millim. 



Colour in life deep purple-lake. 



A single female, with just-commencing brood-pouch, was 

 taken at Station 117, 17'48 fathoms. 



2. Gnathophausia brevispinis, sp. n. 



Gnathophausia gracilis, var. brevispinis, W.-M., Anu. & Mag. Nat. Hist. 

 (6) Tii, 1891, p. 188, d- 



(^ ? . Differs from the Atlantic G. gracilis, Suhm, in the 

 rostrum being recurved and shorter than the carapace ; in the 

 dorsal crest of the carapace being distinctly foliaceous through- 

 out, and at the base of the rostrum expanded into a siibtrian- 



