184 



COPEPODA 



\ 



only the limitation between Re I II indicated, where the muscle is fastened inwards; the articulation 

 between the Re II and III is well marked anteriorly, but only indistinctly so posteriorly (text-fig. 54 e). 

 The exterior border has a well marked concavity (as shown in Farran's fig. 18 in contrast to Scott's 

 fig. 15) and a long and slender Se i, almost reaching the base of Se 2. The pcs II is like the figures 

 of the two authors; the Se Re II scarcely reaches the end of the Se i Re III, and Se 2 Re III scarcely 

 reaches the end of Se 3. 



The epistoma and the anterior surface of the labrum are scarcely different from those of E. norv. 



The oral surface of the labrum (fig. 1 1 a) 



a b c e 



shows a distinct difference from that of 

 E. norv., as is realised by comparing fig- 

 ures; the most characteristic feature is the 

 lateral position of the first group, in front 

 of which, behind the marginal fringe, a 

 granular area is found. The usual spinous 

 area behind the median spot Nr. 4 is 

 wanting. The lamina labialis is, as seen 

 in fig. nb, somewhat different from 

 E. norv., but more interesting is the large 

 lateral group of hairs almost completely 

 fused with the median group, situated in 

 front of the lamina. The lobus labialis has 

 the posterior lateral group well developed. 



c?. Size: 4-8 mm.; anterior division 

 (2 - 2 + I- 4) = 3' nim.; urosome 1-2 mm. 



The body is rather clumsy, and about 

 3 times as long as the urosome; no dif- 

 ference was found between the lateral 

 corners on the right and left side, and 

 no tooth was observed. The genital so- 

 mite is distinctly asymmetrical, as it is 



a. f9. Abdomen X 18. b-c. f9. Furca X 18 and 57. d. 9. Maxilla dext. produced behind on the right side. The 



from behind X 57- e. f9. Pes I X 57- f- fc?- Pes V in anterior view 



X75- g h- y9-d (St. V). Abdomen x 16. j. yd (St. V). Pes V x 57- subapical seta is as usual in the male 



short and thin. 



The maxillulae are as a whole less developed than in the male of E. norv., and differ in minor 

 points. The Le I has, in addition to the 5 long setae, a delicate basal one, and the Basp. has only a 

 single seta. The Basp. II of the maxillipeds has in the lob IV only a single hair in addition to a 

 hooked clumsy organ surrounded by delicate hairs (fig. n c). 



The pes I has no Se in the first segment, which is well separated from the second by a com- 

 plete articular membrane; the Se 2, which is short and strong, is placed on the somewhat produced 

 exterior corner of Re II. The pcs II has, in contrast to the female, the Se Re II very short 



f g 



Text-fig. 54. Eucheete bisinuata G. O. Sars. 



