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



fathoms; and one male and a young one from Station 116, 

 405 fatlioms. 



Colour in life pink. 



12. Ilaliporus neptnnus^ Sp. Bate. 



Ilaliponis neptunus, Sp. Bate, 'Challenger' Macrura, 1888, p. 201, 

 pi. xlii. fig. 3. 



In our specimens the rostrum is sharper and more ascen- 

 dant, and the crests of the last three abdominal terga are 

 spinosc at the extremity, the spine in the first two springing 

 from the bottom of the median cleft. 



The telson, which is trifurcate, reaches about midway 

 between the outer and inner lamella of the swimraerets when 

 these are laid back. 



In addition to an extra-ocular plate and antennal, post- 

 antennal, hepatic, and post-branchiostegal spines, there is a 

 true branch iostegal spine. 



There is a still greater disproportion between the propodite 

 and dactylopodite of the last pair of legs than in the last 

 species. 



One female from Station 111, 1644 fathoms, and two from 

 Station 117, 1748 fathoms. 



Colour in life lurid orange. 



Subfamily Arist^ina. 



Artst^US, Duvernoy. 



A7'isteus, Duvernoy, Ann. des Sc. Nat., Zool. 1841 (ii.), xv. pp. 101 



et seq. 

 Hemipencetts, Sp. Bate, 'Challenger' Macrura, 1888, p. 290 (ex parte). 



Rostrum three-toothed ; carapace without hepatic spine ; 

 antennal scale large ; mandibular palp thin and foliaceous, 

 with terminal joint triangular ; dorsal carina of last three 

 abdominal terga terminating posteriorly in a spine ; postero- 

 lateral angles of abdominal pleura simple and unarmed ; legs 

 without exopodites ; dactylopodites of the last two pairs of 

 legs setaceous. 



The branchial formula of An'stams virilism Spence Bate, 

 is as follows : — 



