Die nordischen Schizopoden VI 123 



immediately in front of it. Eyes rather large, set close together, the anterior and 

 posterior margins of their peduncles not noticeably differing in lengtli; colour 

 orange-brown after preservation. Antennular peduncle with the basal Joint as long 

 as the two reniaining, its outer corner produced into a somewhat acute process 

 tipped with three or four setae; niiddle Joint much the shortest of the three; distal 

 Joint with a sniall spine at its inner distal corner, male process of moderate size 

 but very hirsute. Antennal peduncle with the proximal Joint small, middle Joint 

 once and a half times as long as the distal; these last two joints beset at their 

 inner distal angles with a bunch of setae. Antennal scale about three times 

 as long as broad; outer margin entire, terminating in a strong spine, the 

 extremity of which is about at the level of the extremity of the peduncle; apex 

 very obliquely truncate, about one-third of the length of the scale being beyond 

 the extremity of the spine; extremity of scale at about the level of tiiat of anten- 

 nular peduncle. Mandibles generally as in Erythrops, three-jointed, first Joint small. 

 second longer than third and unusually broad, its greatest width being more than 

 half (17:30) of its length; last Joint tipped with a fine seta as long as itself, 

 First and second maxillae generally as in Erythrops. First thoracic limb with 

 endopod as in Erythrops, exopod with a small spine at its distal angle, flagelliform 

 part with nine joints. Second thoracic limb with endopod proportionally shorter 

 and stouter than in Erythrops, carpus much shorter than merus. Exopods of 

 second and succeeding thoracic limbs with flagelliform parts of ten joints. All the 

 thoracic limbs with small forwardly directed digitiform epipodites on the basal 

 parts. Ventrum, in the male only, armed between each of the pairs of thoracic 

 limbs with a forwardly directed sickle-like process, terminating in a stout spine, 

 its posterior or inferior edge beset, except proximally, with short spines; also 

 armed between the first to third pairs of pleopods with short simple spineless 

 processes. Pleon distinctly narrower than carapace, the sixth segment about as 

 long as the two preceding taken together. Pleopods generally as in Erythrops, but 

 with the second to fifth of the male having the lateral lobe of the inner ramus 

 produced inferiorly into a considerable ovoidal slightly pedunculate lamella of 

 about one-third of the length of the whole ramus. Telson more than half as long 

 as the inner uropod; its apex broadly truncate but somewhat rounded at the angles, 

 armed with a median pair of setae and with one small and two large spines on 

 either side, the outer spines the longest; lateral margins armed on about the 

 distal three-fourths with a series of about seven to nine spines increasing in length 

 from in front backwards the posterior spine incurved and occupying the angle of 

 the apex. Inner uropods somewhat the shorter, unarmed ventrally. Otocyst 

 somewhat unusually inflated. 



Length of adult males and females, 10 mm." (1. c.) 



Verbreitung: Bisher nur aus den irischen Gewässern (164 — 288 F.) bekannt. 



Gattung Longithorax Illig. 

 1904. Longithorax G. Illig, Zool. Anz. v. 30 p. 200. 



