68 CRUSTACEA MALACOSTRACA. IV. 



P'irst pair of legs mutilated ; second joint with most of the teeth on the inner margin less developed 

 than in I), serrata. Second pair of legs with a couple of small teeth at the end of the inner margin of second 

 joint, but without the long process found in D. serrata and D. biplicata; ischium with a small, slender tooth 

 at the distal inner angle; carpus slender and about as long as the distal joints together. Uropods (fig. 7 a) 

 slender ; peduncle a little longer than the two posterior abdominal segments combined, with about 8 spines 

 on the inner margin ; endopod somewhat shorter than the peduncle, its first joint somewhat less than twice 

 as long as the two distal joints combined, with 7 spines on the inner margin; second joint conspicuously 

 longer than the third, with 2 spines ; third joint with the long terminal spine and a small spine near the end ; 

 the exopod reaches distinctly beyond the second joint of the endopod. Telson (fig. 7 a) as long as the exopod 

 of the uropods; its thickened part is short, while more than its distal half is very slender, with 4 pairs of 

 lateral spines rather distant from each other; the terminal spines lost in the specimen. 



Length of the adult female 5.1 mm. 



Remarks. D. scabra is instantly separated from D. biplicata in having no plicae on the carapace; 

 from I), serrata in having the distal part of the telson much longer and more slender, and by the proportionately 

 shorter exopod of the uropods. It may be remarked that I have not examined the mandibles of the single 

 specimen, but the antennae agree with those in Diastyloides serrata ; besides telson, uropods, shape of carapace 

 show close relationship to I), biplicata. 



Occurrence. Not taken by the "Ingolf", but by the "Thor" at a single station. 



South-West of the Faeroes: Lat. 6iO7' N., Long. 93o' W., 443 fath. ; i female with marsupium. 



Brachydiastylis Stebbing. 



This genus was established on a single species of Diastylis of somewhat aberrant aspect, D. resima 

 Kr. Among the material to hand is the adult female of another species, which is allied to B. resima, but posses- 

 ses in a still higher degree most of the peculiar features which separate the last-named form from the species 

 of Diastylis. Consequently it may be justified to keep the two species in a separate genus which may be 

 distinguished by the following diagnosis. 



Pseudorostrum, which is long and somewhat or much upturned, has at least in the female several 

 plumose setae along the lower margin and anteriorly upwards on the sides and above behind the end. Anten- 

 nulte with the two proximal joints of the peduncle thick and short ; third joint elongated, with a row of plumose 

 seta;; upper flagellum 4-jointed, the lower 3-jointed. In the female third and fourth segments are immovably 

 coalesced, and there is a considerable distance between the insertion of second and third pairs of legs. Second 

 pair of legs in the female unusually short, not half as long as the first pair ; in the male 1 second legs are anomal- 

 ous, with second joint much expanded, carpus elongated and much longer than in the female, propodus 

 armed with a long lateral process from the end. Third and fourth pairs of legs extremely robust and "adapted 

 for digging", with several very thick setae on the short and broad carpus; third legs with a long, spiniform 



') Only the male of /?. resima is known, but most probably second legs are in the male of R. nimia n. sp. built as in 

 the other species. 



