CUMACEA FEOM THE COPENHAGEN MUSEUM. 383 



segments ; the merus is produced distally on the outer or posterior side of its articu- 

 lation with the carpus into a rounded tubercle. 



The uropods are slender, the peduncle about as long as the telson, with about twelve 

 spinules on the inner edge. The exopod is shorter than the endopod, and curved. 

 The endopod is about half as long as the peduncle, distinctly divided into three 

 segments, of which the first is longer than the other two together ; the inner edge has 

 about eleven spinules, and the short terminal spine is distinctly defined. 



Remarks. — The hairiness of the carapace gives this species some resemblance to 

 D. goodsiri *, which it further resembles in the acutely produced lateral angles of the 

 abdominal somites and in the length and slenderness of the lateral spines on the telson. 

 It diifers in the form of the carapace, which is narrowed in front, in the great length of 

 the pseudorostrum, and in the proportions of the telson. The knob-like prominence 

 on the merus of the last three pairs of legs appears also to be a distinctive character. 



Occurrence. — " Korea, 35 fathoms, Suenson Coll., 22/1/82." Copenhagen Museum. 

 Co-types in British Museum. 



DiASTYLisC?) FisTULARis, sp. u. (Plate XXXVII. figs. 26-36.) 



Description of young Specimen (i. Male). — Total length 3"1 mm. 



Carapace about one-third of total length, its vertical height about one-half of its 

 length, subcylindrical, abruptly narrowed in front as seen from above ; dorsal surface 

 slightly arched, rather flattened anteriorly. Pseudorostrum straight, acutely pointed. 

 Antennal notch hardly indicated. Posteriorly the surface of the carapace bears four 

 longitudinal ridges on each side ; anteriorly on each side is a vertical ridge forming 

 a marked " shoulder " when viewed from above ; from the upper end of the vertical 

 ridge an obliquely longitudinal ridge runs backwards and curves towards the median 

 line about the middle of the dorsal surface. The ocular lobe is a little broader than 

 long and is without pigment or definite corneal facets. 



The first free thoracic somite is partly concealed laterally ; the third and fourth are 

 not distinctly separated on the dorsal surface. 



The abdomen, including the telson, is longer by one-third than the cephalothoracic 

 region; the fifth somite is hardly longer than the preceding ; the sixth is longer than 

 the fifth, somewhat flattened, hardly longer than broad, witli the uropods articulated 

 about the middle of its length. 



The telson is about as long as the last four somites together, and two-thirds their 

 thickness. It is cylindrical in form, with a slight dorsal curvature, and bluntly pointed 



* Sars states (Crust. Norway, iii. p. 54) that in I), goodsiri the surface of the carapace is " without any 

 spines or denticles." Hansen, on the other hand, describes it as " taet besat med meget fine skarpe og spidse 

 Kegler." A fine specimen, received from the Copenhagen Museum, agrees with Dr. Hansen's description in 

 this respect. 



3f2 



