398 



cessively decreasing in size, 1st joint rather large, and but slightly curved, 

 flagellum much shorter than tlie peduncle, and composed of 6 articulations 

 only, accessory appendage about the length of the 1st joint of the flagellum, 

 and biarticulate. Inferior antennae somewhat longer than the superior, the 

 last 2 joints of the peduncle nearly equal-sized, flagellum about half the 

 length of the peduncle, and Garticulate. Gnathopoda almost exactly as in 

 B. iypica. The 2 anterior pairs of pereiopoda also of much the same structure 

 as in that species; the 3 posterior pairs rather strong, and not very ixnequal 

 in length, basal joint of last pair much larger and broader than in the prece- 

 ding pairs, nearly cordiform in shape, posterior edge, as in the preceding 

 pairs, minutely serrated, meral joint considerably expanded in its proximal 

 part. The 2 anterior pairs of uropoda nearly as in the type species; last 

 pair with the rami scarcely longer than the basal part, and quite naked. 

 Telson fully as long as the urosome, and slightly instricted near the base, 

 outer part tapering to an acute simple point. Body light yellowish, orna- 

 mented with large, irregular patches of a diffuse, brick-red pigment. Length 

 of adult female 6 mm. 



EenmrJcs. — Though rather nearly allied to the preceding species as 

 regards the structure of the several appendages, this form is at once distin- 

 guishable by several very conspicuous external characteristics. For instance the 

 form of the cephalon and the rostrum is very different, the dorsal projections 

 much more numerous, and the 2 anterior segments of metasome prominently 

 distinguished by the distinct lateral keel running along them, and causing 

 their posterior edge to be conspicuously angular on each side; finally the 

 colour of the body is very characteristic and unusual. 



Occurrence. — I have met with this species only in 2 localities of 

 the Norwegian coast, viz, off the Lofoten Isles, and at Bejan in the outer 

 part of the Trondhjemsfjord. It occurred in both localities rather sparingly, 

 in a depth ranging from 100 to 300 fathoms. Out of Norway, it has not 

 yet been recorded. 



Gen. 4. TirOD, Lilljeborg, 1865. 



Syn. : SyrrliOL', Goes (part). 

 5 Tessarops, Norman. 



Body less robust than in tiie 2 preceding genera, and with the 

 integuments rather thin. Cephalon of moderate size, and but slightly pro- 

 duced in front, lateral parts not expanded. Coxal plates well developed; 



