﻿COPEPODA 



17 



The body appears more slender tluin in tlie i)recedin<; stajje; the nrosonie consists of 2 somites; 

 the Se of furcal rami is missing (textfig. 3 a^h). Tlie antennn'.ae, which consist of 23 segments, 

 extend 3 segments beyond the tip of the abdomen. The antennae and other mouthlimbs except the 

 maxillnlae, in wliich the Le has 8 setae and the Re 8, are scarcely different. The lateral outline of 

 the labrum is as shown in textfig. 3 a alike stage \', but the frontal protuberance is less prominent. 

 The oral surfaces of the labrum and the labium are in their main structures alike ff. 



Pes I = St. IV. Pes II in main features alike St. IV. but Ri with 8 setae and Re II ~ III, 

 which is less slender, with 4 Si only (textfig. 3 c). Pes III is comparatively shorter than II, and the 

 Re II csj III has only 2 Se (fig. 3 d). The pes IV (fig. 3 e) has no seta in basipodite II, 7 setae in 

 unsegmented Ri and 3 Si + 3 rather short Se in Re. The pes V (fig. 3 f) is represented by a wide 

 indistinctly divided basal part, which is distally attenuated, and here subdivided into longer outer 

 branch with at least 3 setae decreasing outwards and a shorter inner liranch with 2 fairly long setae. 

 Secretory pores were with certainty only observed at the base of Se 3 Re II ~ III in ])es II — III. 



Textfigure 4. Cul. finmnfcliicns G. Q. (Stage II). 

 a. In lateral view X S5. b. Pes IV X 225. 



Y. (St. II). vSize: Varying from o-g (S. W. Iceland), i-i (Davis Strait), 1-3 (i -j- o-3) (Jan ^layen) 

 — 1-6 mm. (Jan Wayen). Gran's specimens (-^ urosome) of his stage V varied from 078 — i-oi and 

 specimens from due d'Orleans from 1-4 — I'S mm. 



The body is more slender than in the preceding stage (textfig. 4 a). The head is sometimes 

 indistinctly separated from the first thoracic tergite, in addition to which 3 somites are found, of which 

 the last one only bears a rudimentary pair of legs. The antennulae, which reach about one segment 

 beyond the tip of the fnrca, consist of 18 segments only, as the segments proximal to the 11 are more 

 or less fused. Tlie antemiae and maudibulae arc practically alike tho.se of the f^- The number of .setae of 

 the maxillnlae is comparatively small; I<e luis only 6 setae, Li I has only lo spines, basipodite III 

 has 3, Ri I I, Ri II 2, Ri III 5 and Re 7 setae. The nuixillae are in the main features alike the f'f. 

 The maxillipeds are in shajH' alike tlie preceding stages, but the Hasp. Ill has in tlie middle oidy 

 2 Si, as the basal one is wanting, Ri I has a single seta, Ri 11 (i)robably Ri II :^ III) is rather elongate 



The Insolf-l-\|KJiii<iii. HI. ,|. 3 



