no 



COPEPODA 



groups with from 10 — 25 slender setae, of which the first is placed behind near the middle, while the 

 third, which is more longitudinal, is placed laterally more in front. The series Nr. 5, to which the two 

 most medial groups mentioned ought perhaps to be referred, falls in this species naturally into three 

 divisions, forming together an outwards convex figure (like that in fig. 7 f PI. II) consisting of 2 hairs 

 most medially, well separated from the group of 14 hairs, which is almost fused with the dense longi- 

 tudinal row almost reaching the end of the labial lobes; the series Nr. 3 — 4 are scarcely different from 

 those of G. brevispinus (PL II fig. 7 f). 



Yn (St. V). Size of female from Thor St. 183 was 4-16 mm.; anterior division 3-29 mm.; 

 urosome 0-87. 



There is indication of an articular line between head and first thoracic tergite, and between the 

 fourth and fifth ones. The relative length of the abdominal somites and the furcal rami, which are 

 i*2 as long as wide, is the following: 19, 19, 17, 19 and 17. The first abdominal somite is somewhat 

 produced below, more so than in the male. The inner margin of the second basipodite is in both sexes 

 almost straight, and distinctly different from that described in the adult female; in the female we find 

 about 20 stiff pointed setae, and in the male about 9 setae of usual structure (in pes II a close row of 

 20 is observed). The fifth pair of legs is very similar to that of G. Kmppi (text-fig. 27 e). 



Yg (St. IV). Size of female from Thor St. 183 was 3-13 mm.; anterior division 2-53 mm.; 

 urosome o - 6o. A male measured 3*45 mm. 



The relative length of the abdominal somites and the furca is as follows 15, 18, 19 and 13. 

 The antennulae extend by at least 2 segments beyond the end of the abdomen. The maxillulae 

 show differences corresponding to those described in G. Kruppi. The lamina of the maxillipeds 

 has a less complicated structure, is more prominent and of obtusely triangular shape. The pes I has 

 the Re I — II fairly well separated, and has 3 Se pes I; the second basipodite of the fourth pair of 

 legs has only 3 — 4 setae along the inner margin. The only difference between the male and female 

 is found in the presence of a fifth pair of legs (cf. text-fig. 27 o). 



Y (St. III). Size of specimen from St. 82 was 248; anterior division 2^04; urosome 044 mm. 



The head and the first thoracic somite as well as the fourth and fifth ones are well separated. 

 The frontal spine is scarcely different from that of the adult females, but the lateral corners of the 

 thorax are rounded without trace of spines. The relative length of the abdominal somites and the 

 furca is 15, 18 and 9. The antennulae, which extend 3 segments beyond the end of the ab- 

 domen, show similar differences from those of the adult ones as in G. Kruppi. The maxillulae have 

 only 8 setae in L,e, but in other respects show similar differences as in preceding; the L,i II possesses 

 5 setae as in the adult females. The exterior margin of the maxillae (text-fig. 27 c) is almost straight, 

 in contrast to the structure in the adult females, the structures in the two preceding stages forming 

 intermediary steps. The lamina of the maxillipeds is more regularly rounded and apparently more 

 prominent (text-fig. 27 d). 



In the first pair of legs the segmentation of the exopodite is only indicated laterally; 3 Se are 

 present, but the two proximal ones are very short; the 3 last pair of legs are scarcely different from 

 those of G. Kruppi. 



