132 



CRUSTACEA MALACOSTRACA. III. 



discovered, some of the characters in the description of the genus will have to be considered only of 

 specific value. 



Occurrence. Taken at a very deep station in the warm area. 



South-West of Cape Farewell: Stat 22: L,at. 58io' N., Long. 4825' W., 1845 fath., temp. 1-4; i spec. 



As the specimen is unusually well preserved it has perhaps been taken from the meshes of the 

 trawl, and may possibly be pelagic not too far from the bottom. 



Storthyngura Vauhoffen. 



Vanhoffen wrote (1914) that he established this new genus for the forms of Eurycope "mit za- 

 ckigem Abdomen, welche auf dem Korper mehr or weniger bedornt sind", while he left in the old 

 genus all the species with the abdomen rounded. He enumerated eight species as belonging to Stor- 

 thyngura, viz. S. intermedia Bedd., S. fragilis Bedd., S. atlantica Bedd., S. nova-zealandice Bedd., S. ca- 

 ribbca Benedict, i! tnincata Richardson, S. magnispinis Richardson and S. clegans Vanhoffen. He over- 

 looked my description and figures of Eurycope pulchra H. J. H. (1897), as this species is well armed 

 with processes and must be referred to Storthyngura. 



The existence of processes on thorax and abdomen is a very practical character, but if no other 

 features could be found, the genus would seem to be of slight value. I have seen only two of the 

 species enumerated, viz. 5". pulchra H. J. H. and -5". magnispinis Rich., but these species show some 

 characters which can be considered of generic value if they also are found in the other forms, which 

 probably is the case. In both species the antennal squama is not set off by an articulation. The three 

 posterior thoracic segments, though well marked off in 6". pulchra, are immovably coalesced, while the 

 articulation between thorax and abdomen allows in S. magnispinis a quite feeble and in S. pulchra 

 no movement The natatory legs have the fifth joint at least almost twice as long as broad, thus less 

 expanded than in Eurycope, and the median lamella of the male operculum has its central part con- 

 spicuously narrower than the more distal portion. 



Only a single species is known from our area. 



86. Storthyngura magnispinis Richardson. 

 (PI. XII, figs. 3 a- 3 u). 



1908. Eurycope magnispinis Richardson, Proc. U. S. Nat. Mus. Vol. XXXV, p. 84, fig. 21. 



Description. Body rather oblong, moderately convex. Head (fig. 3 b) without dorsal keels 

 or any limited front area; somewhat before the posterior margin a pair of broad and low, circular pro- 

 tuberances. -- Antennulse considerably less than half as long as the body, in the main as in Eurycope, 

 inserted on the dorsal surface of the head not far from one another; first joint depressed, about half 

 as long again as broad, with the antero-interior angle produced into a conspicuous subconical process, 

 while the distal outer, somewhat broad part is considerably produced and broadly rounded, so that 

 the second joint, which is rather small and about as long as broad, is placed on the distal upper sur- 

 face of first joint; third joint slender and about as long as the second; the flagellum with numerous 



