419 



Occurrence. I have met with this species not rarely in a single 

 locality of the Trondhjemsfjord, at Vennses, in a depth of 100 to 150 fathoms. 

 It also occurs off the coast of Finmark, where several specimens were collected, 

 many years ago, but at that time was confounded with E. cuspidatus. Finally, the 

 same species has been found by the author at Selsovig, on the Nordland coast. 

 Off the west and south coasts of Norway, on the other hand, I have never 

 met with this form. 



3. Eusirus minutus, G. 0. Sars, n. sp. 



(PI. 147, fig. 2). 



Body considerably shorter and stouter than in the last species and, 

 in this respect, more resembling that of E. cuspidatus. Posterior part of the 

 back distinctly carinated, the carina being produced, on the last segment of 

 mesosome and the 2 anterior ones of metasome, to well-defined, posteriorly 

 pointing projections. Cephalon about the length of the first 2 segments of 

 mesosome combined, rostral projection well developed, lateral corners trans- 

 versely truncated at the tip. Coxal plates comparatively smaller than in the 

 2 preceding species; 1st pair fully as broad as they are deep, and having 

 both the anterior and posterior corners evenly rounded, without any trace of 

 serrations; 4th pair scarcely as deep as the corresponding segment, and 

 having the posterior projection rather blunt. Last pair of epimeral plates of 

 metasome narrowly rounded at the lateral corners, which are minutely 

 serrated, upper part of the posterior edge somewhat arched and quite smooth. 

 Ej^es only faintly traced in alcoholic specimens, but apparently of the usual 

 oval reniform shape. Antenna in female comparatively short, and nearly 

 equal in length; the superior ones scarcely exceeding in length V* of the 

 body, 1st joint of the peduncle rather large and thick, considerably exceeding 

 in length the other 2 combined, and produced at the end posteriorly to 

 an acute lappet, 2nd joint unusually short, and having the inner terminal 

 lappet bidentate, nagellum somewhat longer than the peduncle, and composed 

 of 10 articulations only, none of which are provided with calceolae, accessory 

 appendage very minute. Same antennse in male much more elongated, having 

 the nagellum about 3 times as long as the peduncle, and composed of numerous 

 articulations, the proximals of which are densely clothed with slender sensory 

 bristles. Inferior antennse in both sexes of the very same appearance, last joint of 

 the peduncle somewhat shorter and narrower than the penultimate one, flagellum 

 about half the length of the peduncle. Gnathopoda not very strong, carpal 

 process rather produced, though very narrow, propodos subquadrangnlar in 



