CHRISTIANIA VIDENSK.-SELSK. FORHANDL. 18 83. No. 7. 35 



42. Boreomysis obtusata n. sp. 



Form of body somewhat robust. Carapax rather large, cover- 

 ing the whole aiiterior division of the body, with a very marked 

 cervical furrow across the aiiterior part, antero-inferior angles 

 exserted and triangular, frontal margin produced, and obtusely 

 truncated anteriorly, with only a very slight projection in the 

 middle, as a rudiment of rostrum. Last postabdominal segment 

 rather elongated. Eyes short, but rather expanded, somewhat 

 flattened, almost circular, the cornea deeply emarginated above. 

 Antennular peduncle rather strong, and of the structure peculiar 

 to the genus. Antennal scale surpassing by half its length the 

 antennular peduncle, very slightly tapering, apex truncated, the 

 denticle on the outer edge well marked. Telson about as long as 

 the last segment, slightly tapering posteriorly, the lateral margins 

 densely and unequally spinous, apical incision occupyiug about '/ 5 

 of the length of the telson, rather narrow, and densely serrated at 

 the margins. Uropods of the usual structure. Length of adult 

 male: 30 mm. 



Hab. Off" coast of Japan (Stat. 232), 346 fms. A single 

 specimen, adult male. — North Pacific (Stat. 252), 2740 fms. 

 Another male specimen. 



RemarJcs. This new species is most nearly allied to the Nor- 

 wegian form B. tridens, but readily distinguished by the obtusely 

 rounded frontal margin. 



43. Boreomysis microps n. sp. 



Form of body somewhat more slender than in the last species. 

 Carapax rather large, and of the usual form, frontal margin arched, 

 with a slight pointed projection in the middle. Last postabdomi- 

 nal segment elongated and narrow. Eyes very small, only slightly 

 expanded at the apex, claviform, cornea occupyiug only a small 

 part of the upper face. Antennular peduncle somewhat more 

 slender than in B. obtusata. Antennal scale only surpassing the 



antennular peduncle by 1 / i of its length, apex truncated, the den- 



3* 



