430 W. T. Calman 



The next two pairs of legs are moderately stout and a little 

 more tban 2/3 of the length of the carapace. The basis is less tban 

 half the length of the leg and bears, close to its proximal end, a 

 rudimeutary unjointed exopod in the form of a curved, conical 

 papilla. The last thoracic somite is without appendages in all the 

 specimens examined. 



The peduncle of the uropods (fig. 45) is shorter than the telson 

 and less tlian IY2 times the length of the exopod. The endopod 

 is slightly less than 2/3 the length of the exopod and is divided into 

 three segments. 



Remarks. In having the pre-anal part of the telson very 

 distinctly longer than the post-anal the species described above 

 agre es with Diastylis longipes , D. josephince , D. ermaceus and D. 

 insignis of Sars, D. costata of Boxnier, D. cingiilata of Calman, 

 and also with the Leptostylis longicaudata and Diastylopsis (?) dubia 

 of BoNNiER. From all these species it is separated by the long 

 spines of the carapace. It is uulikely that the absence of the last 

 pair of legs will prove to be a permanent character of the species 

 (cf. Calman, Fisheries Ireland Sc. Invest. 1904 N: 1 [1905] p. 40 

 and it is possible that the presence of rudimentary exopods on the 

 third and fourth legs is also a character of immaturity, or, at all 

 events, is unreliable as a generic distinction (Bonnier, Ann. Univ. 

 Lyon Tome 26 Campagne du Caudan, p. 561). I have therefore 

 placed the species, for the present, in the genus Diastylis. It is 

 possible that this may be the species recorded by Sig. Lo Bianco 

 as D. spinulosa Heller. 



Occurrence. — Stations 39 and 44. Depth iOOO — 1100 metres. 



Diastyloides serrata G. 0. Sars. 

 D. serrata, G. 0. Sars, Criist. Norway Vol. 3 1900 p. 61, pl. 45. 



Occurrence. — Stations 17, 18, 26, 29, 39, 44. Depth 

 100—1100 metres. 



Diasfyloides sp. 



A species of this gemis which appears to be new is represented 

 only by immature and mutilated specimens. It is closely allied to 

 D. serrata, from which however it differs in the shorter and biunter 

 rostrum and in the presence of a pair of denticles on the dorsal 

 surface of the frontal lobe of the carapace. 



Occurrence. — Stutions 8 and 29. Depth 100 and 120 metres. 



