232 Holt & Beaumont — Survey of Fishing-grounds, W. Coast of Ireluml, 1890-91. 



Genus Parerythrops, G. 0. Sars, Monog. over Mysider, Pt. I., ncc Pt. III. 



Nematopus, G. 0. Sars. 



Eges short, not flattened, nearly globose, remote from each other ; pigment 

 of dull fulvous colour, not soluble in spirits. Antennal scale very short ; external 

 margin not ciliated, terminating in a spine-point. Legs of moderate length, 

 rather robust; tarsus of (about?) three articulations, besides the stout nail. Telson 

 elongate, sub-triangular ; lateral margins entire ; apex narrowly truncate, beset 

 with four slender S2:)ines and two set£E. Pleopods in female small, simple ; in 

 male first pair small, simple ; remaining pairs biramous, natatory. (Abbreviated 

 from G. 0. Sars.) 



Parerythrops obesa, G. 0. Sars. 



PI. XVI., figs. 2, 3. 



Parerythrops obesa, G. 0. Sars, Carcinolog. Bidrag. Norg. Faun., I. 

 Monog. over Mysider, 1870, p. 41. 



Carapace of about equal horizontal width throughout, the greatest width Ijeing 

 much more than half the length ; anterior margin produced so as to form nearly 

 a right angle. Pleon less than half as wide as cephalothorax, its last segment 

 longer than the otiiers. Eges large, sub-globose ; internal margin but slightly 

 emarginato. Antennule, peduncle a little longer than tlie eye ; its distal articula- 

 tion longer than the united length of the two proximal. Antennal scale a little 

 longer than peduncle of antennule, sub-rhomboidal, about three times as long as 

 wide ; outer margin terminating in a spine, beyond which the linguiform apex is 

 produced so as to occupy nearly half the length of the scale. Telson nearly equal 

 in length to the last segment of abdomen ; elongate, sub-triangular, greatest 

 width much less than length ; lateral margins nearly straight ; apex very narrow, 

 squarely truncate ; outer pair of terminal spines not half as long as the inner 

 pair. Uropods, outer about one-third longer than inner ; the latter with about 

 20 strong spines occupying the greater part of its inner margin. Pigment uf 

 adult bright red. Length of adult female about 13 mm., of male about 14 mm. 

 (After G. O. Sars.) 



Survey. — Station 115. Off the Skelligs, 62 to 52 fathoms, mud and sand. 

 August 20th, 1890. 



No Previous British Record. 



Distribution.— Norway ; Lofoten ; Finmark, 30 to 200 fathoms (G. 0. S.). 



