﻿copivi'onA 70 



The Aiitfiinnlar arc in the main Hkc Sars' fij^ure; the .se<,Miients 24^25 arc ahiiost completely 

 fused; tlie segments 8^ 9 and 10 as well as the 20 — 21 are almost completely fused on the right side, 

 but fairly well distinguished on the left side. The segments 8^9 are a little longer than 2, whicli is 

 about 1-2 as long as segment 20; the posterior seta of segment 23 is very short. The antainac are 

 scarcely different from those of the female, in contrast to the iiiandibuhu- which, except for the presence 

 of 2 instead of a single seta in Ri, are completely like .Sars' figure without distinct manducatory plate. 

 The manducatory part of the iiiaxillulac is scarcely tleveloped, and the rudimentar_\- I^i I bears a few 

 .short .semsory appendages instead of .spines; the Li 2 is not developed; the lyi 3 bears 2 feathery 

 bristles, the basipodite 3, and the cudopodite 9 setae; the e.xopodite possesses 9 strong j)lumous setae. 

 The iimxiUac are comparatively more slender than figured by vSars, with a number of \-er\' short 

 spiuides and three proximal knobs. The iinixillipi-ds differ from those of the females by the com- 

 paratively long Basp. fll, which is 17 as long as the second. The first four pair of legs is scarcely 

 different from those of the females. Pes V is scared \- different from Sars' description; the Ki sin 

 (fig. 3 e) is rather elongate; about the structure of the right and the left exopodite I refer to figs 3 g — f. 



Y (Stage V). .Size: .Specimen from Thor St. 72 measured 3'05; anterior di\'ision 2.\ nun., 

 urosome 0-65 mm. Another specimen was 3-65 mm. 



The abdomen consists as usual of four somites, of which the second is the longest; the 

 autennulae are comparatively longer than in the females, and reach to about the end of the second 

 abdominal somite; the articular membrane between the Ri I — II pes II is onh- indicated by a faint 

 line. The pes V of the male is, as shown in PI. II fig. 3 h, like that of Gaidins. 



Y(^ (Stage IV). .Size: Specimen from Thor St. 82 measured 2'i6 nnn.; anterior tlivision 17 nnn.; 

 urosome 0-46. 



The shape of the body is like that of the adult specimens, but the abdomen has only three 

 somites; the number of segments is somewhat reduced in pes IV, as Re II ~ III and Ri II ~ III are 

 mor a less completely fused. Two glandular pores were observed in Re III aiul one in Re 1. The 

 pes V is rather rudimentary, as seen in fig. 3 i. 



Variation. In a few specimens from Thor St. 172 "/,, 1905, which, except for the less promi- 

 nent sexual area, were in all other respects like the adult females, a filth pair of legs, as slu>wn in 

 f'K- 3Ji with the right leg the longer, was found. In a .specimen from .St. 72 (Thor 1905) the left leg- 

 was longer and more slender (fig. 3 1), and in one from .St. 173 (Thor '' g 1905) fig. 3 k the right leg 

 was again the longer. In two specimens from St. 104 (Thor 'i^j 1904), and in one from St. 99 (Thor 

 "/s 1904), the pes V was like fig. 36; the last mentioned si)ecimens as well as one from .St. 153 [J;^ 

 1905) with pes V dext. ; • sin. and well developed eggs had the genital .somite of female type, but without 

 distinct receptacidum seminis. 



As most of the mentioned specimens were in all respects but the presence of pes \ like the 

 typical ones, and as the mentioned stucture was variable to a degree, it nnist be regarded as a kind 

 of abnormity (cf. similar structures in Pscudocahnnis). 



Parasites. In a single adult female from Thor '/,-, St. 285 a stalked para.site was foniul, attached 

 to the first basi]x)dite laterally on the anterior surface of the right maxilla; the body consisted of 



