CRUSTACEA MALACOSTRACA II. 



from the side with their vertical margins most curiously bent twice at the lateral margin. Pleopods 

 wanting. Sixth segment even a little longer than the four preceding segments combined; its posterior 

 margin is not broadly rounded as in T. ochracea but a little produced behind with a somewhat obtuse 

 angle. Uropods much shorter than the sixth segment, thus somewhat shorter than in T. ochracea, 

 with the endopod not quite twice as long as the peduncle, but otherwise nearly as in the last- 

 named species. 



The animal is somewhat light greyish. 



Length of the single specimen about 3.2 mm , thus a little larger than that of the English authors. 



Remarks. The specimen described belongs unquestionably to T. ung uicillata; especially the 

 shape of the proximal parts of both fingers of the chelse and the lateral view of the abdomen as com- 

 pared with Stebbing's figures proves that beyond doubt. The main differences between T. ochracea 

 and T. unguicillata have been pointed out in the "Remarks" on the first-named species. 



Occurrence. It has been taken by the "Ingolf" at the following place. 



South of West-Iceland: 81.69: Lat. 62 40' N., Long. 22 17' W., 589 fm., temp. 3.9; i spec. 



Distribution. The type of Norman & Stebbing was dredged by the "Porcupine" on the 

 slope of the English Channel, Lat 49 f N., Long. 10 57' W., 96 fathoms. No other specimen has been 

 recorded in the literature. 



Strongylura G. o. Sars. 



This genus was established on a single species, S. cylindrata G. O. S., of a peculiar aspect This 

 form is in most characters allied to species of Leptognathia with the pleopods rudimentary or wanting, 

 but it differs by having the abdomen in the female and the subadult male extremely long, only some- 

 what shorter or even as long as the five posterior thoracic segments combined, while the sixth at> 

 dominal segment is extremely long, at least a little longer than the three preceding segments combined, 

 and the biramous uropods are small and thick. Furthermore it differs from Leptognathia and reminds 

 of Cryptocope arctica and Tanaopsis in having third and fourth thoracic segments each conspicuously 

 shorter than the fifth or the sixth segment, the three anterior segments together being in reality 

 scarcely as long as the sum of fourth and fifth segments. 



The "Ingolf material contains two species which I refer to Strongylura\ one of them is less 

 characteristic than 5". cylindrata, while the other species is somewhat difficult, but after long hesitation 

 I have referred it to S. cylindrata. 



Cryptocope arctophylax, established by Norman & Stebbing as a species of Strongylura, differs 

 widely from this genus but is, as already stated, allied to Cryptocope Voringii G. O. S. No other species 

 hitherto described has been referred to Strongylura. 



73. Strongylura cylindrata G. O. Sars. 

 (PI. XII, figs. la-il.) 



1881. Strongylura cylindrata G. O. Sars, Archiv for Math, og Naturv., B. VII, p. 53. 

 ! 1896. Account Crust. Norway, Vol. II, p. 36, PI. XVI, fig. i. 



