134 CRUSTACEA MALACOSTRACA. III. 



the second pair of pleopods (fig. 3 n) have the distal part somewhat produced, moderately broad and 

 rounded; the copnlatory organ is somewhat slender, with the distal fourth filiform and reaching a little 

 beyond the end of the pleopod. - The outer branch of the penultimate pair of pleopods is narrow. 

 - Uropods (fig. 3 k) in both sexes of very moderate size; the peduncle is slender and about as long 

 as the endopod, which is somewhat longer than the thinner exopod. 



Length of a female with marsupium 4-2 mm., of a large male 37 mm. 



Occurrence. Taken by the "Ingolf at two deep stations in the warm area. 



Davis Strait: Stat. 24: Lat. 63o6' N., Long. 56oo' W., 1199 fath., temp. 2-4; 6 spec. 

 Stat 36: Lat. 6i5o' N., Long. 562i' W., 1435 fath., temp. 1-5; 7 spec. 



Distribution. The type, hitherto the only specimen recorded, was taken by the "Albatross" 

 at Lat. 3949'N., Long. oS^S'/z' W., 1467 fath., temp. 3-15 (Richardson). 



MunnOpSUrUS Richardson. 



In 1912 Harriet Richardson published a small paper containing only the description of 

 nopsurus arcticus, n. gen., n. sp., from Novaya Zemlya. This form is Eurycopc gigantca G. O. Sars, but 

 while Richardson's name for the species consequently must be cancelled, the genus may be accepted. 

 To the same genus Eurycopc longipes Tatt. must be referred; that Eurycopc gigantca G. O. S. forma 

 australis Vauhoffen from the antarctic deep-sea is a third species can be considered as certain, but 

 Vanhoffen's statements and figures (1914) are too imperfect for closer comparison. 



In Etirycopc the mandibles have the incisive part and the movable lacinia (on the left man- 

 dible) well developed, and generally a row of setae, rarely a single seta; the molar process is consider- 

 ably protruding, rather well defined and its end cut off (comp. figures in Sars' Account). In the two 

 northern species of Munnopsurus the incisive part is simple with a single tooth or none, the movable 

 lacinia and the row of setae completely wanting, while the molar process is shaped as a broad, large 

 tubercle with the end rounded and bearing a small bundle of stiff setae (PI. XII, fig. 6 a, and, besides, 

 figs. 3 c and 3 d on PI. XX in "Dijmphna-Togtets zool.-bot. Udbytte", 1887). In no form hitherto stu- 

 died mandibles intermediate between those in Eurycopc and Munnopsurus have been found, and there- 

 fore the genus Munnopsurus must at least provisionally be considered as valid, though in all other 

 characters it is closely allied to Eurycope, in that the antenna have a distinct squama well marked off, 

 that all thoracic segments are movable, that second joint of second to fourth pair of legs are long, 

 longer than the third joint, and that second pair is very similar to third pair. 



The name Munnopsurus is unfortunately badly chosen, as its species are related to Eurycopc 

 and not to Jlfunnopst's, from which they differ much, not only in general aspect but in having second 

 pair of legs nearly similar to third pair (in Muimopsis second pair is prehensile, similar to first and 

 very different from third pair), in having second joint of third and fourth pairs of legs long, in the 

 posterior thoracic segments, uropods, etc. 



The two above-named northern species are represented in the material. 



