96 COPEPODA 



fairly well marked, and group IV has in addition to the inner series a lateral one with 10 short 

 hairs. The transverse series around the fourth pair of central spots is less prominent than in the 

 preceding species. The lateral group of hairs is assymmetrical in one of the examined specimens. The 

 granular lamina labialis with the area in front of it is shown in fig. 7 f. Behind the lamina labialis 

 four partly fused groups of short spines are placed near the middle line. On the area labialis and the 

 lobi labiales altogether 5 longitudinal series of hairs (PI. II fig. 'ji S' — Ss) arranged as shown in 

 figure were found. 



i^. Size of specimen from St 183 Thor 1904 was 3-34 mm.; anterior division 2-53 mm.; uro- 

 some 081 mm. Wo Ifen den's specimen measured 3-1 mm. 



The shape of the body is practically like that of preceding species, but for the shorter lateral 

 spines (text-figs 24d— f). The antennulae extend almost to the end of the abdomen; the segment 22 

 is 1-4 as long as the segment 17, but in other respects they are scarcely different from those of pre- 

 ceding species. The antennae are comparatively more clumsy, with comparatively shorter Re; the 

 manducatory part of the mandibulae is comparatively more thin-skinned (PI. Ill fig. id), but in 

 other respects the mandibulae are scarcely different. The viaxillulae (fig. 1 e) are fairly well devel- 

 oped; the Le I has as usual 9 setae; the Li I does not possess any setae, but a number of short 

 rounded sensory organs; the Li II which is quite rudimentary, and the Li III which has at least one 

 real setae, possess similar organs. The third basipodite has at least 2 setae and the Ri I— III 3 + 

 3 -|- 6 setae. The Re has as usual 11 setae. The maxillae are scarcely different from those of pre- 

 ceding species (cf. fig. 2 h). The maxillipeds (fig. i f) have the third basipodite 1-3 as long as the 

 basipodites I — II and 2.5 as long as Ri; the basipodites I — II have a rudimentary Li I and a fairly 

 well developed Li IV. 



The first pair of legs has the articulation of Re I well developed (fig. i g), but not only Se 

 Re I but also Se Re II are completely wanting. The St. Re III of pes II has 37 teeth, and the inner 

 margin of the second basipodite in the fourth pair of legs is smooth and has, as seen by comparing 

 figs 7 g and 7 e another shape than in the female. The Jifth pair of legs (PI. Ill fig. i h) is very simi- 

 lar to that of G. fenuispinus, but the basal segments are comparatively shorter, especially the third one 

 of the right side. The left endopodite shows no trace of segmentation, and has no small terminal seta; 

 the left Re III has, as shown in fig. i i, a rather characteristic structure. 



Y (Stage V). Size of female from St. 183 Thor 3-22 mm.; anterior division 2-53 nnn. ; uro- 

 some 0'69 mm. 



The shape of the body, except for the structure of the abdomen, is scarcely different from that 

 of the adult female. The antennulae extend distinctly to the end of the last abdominal somite; the Sp. 

 of segment 23 is only 1-5 as long as the segments 24—25. Tlie maxillulae have only 10 setae in Re, the 

 exterior margin of the basipodite of the maxillae is less distinctly convex, and the laminous process 

 of the exterior surface of the second basipodite of the maxillpeds is less prominent, with a distal tooth. 

 The pes II has the articulation between the Ri I— II slightly developed (text-fig. 241), and the mar- 

 ginal hairs of the second basipodite of the fourth pair of legs are in the male only fewer (about 10) 

 than in the pes III, but not different; in the female, however, not only the number is smaller (17 against 



