﻿COI'EPODA 



49 



1905. Eucalamis eloiigatus Dana. Ksterlv, p. 131 132, figs. 



6 a- (i. 

 1905. ' — — — Th. Scott, p. 222. 



1905. — — — Farran, p. 30. 



1906. — — — Pearson, pp. 6—7. 

 1906. — — — G. O. Sars, p. 2. 



190S. luicalanus elongatus Dana. v. Bremen, p. 15, fig. 10. 



190S. — — — I'arran, p. 21. 



190S. — — — Wolfenden, p. 29. 



1910. — — — Farran, pp.93- 94, pl.XIV. 



1911. — — — Wolfenclen, p. 204. 



Description, f^. Size: 65 inni. The female.s .scarcely differ from Giesbrecht's description. 

 No glandular pores were obser\-ed in the natatory limbs. 



The labnaii proper, which i.s suddenly raised froni the region hing in front of it, is by a 

 transverse groove divided into an anterior and a more rai.sed posterior portion; the latter is divided 

 into three hairy lobes, a median and two lateral ones =" <= 



(text-fig. 9 a). The oral surface (fig. 5 a) shows a structure 

 similar to that found in R/iiinalaj/us. but the two first 

 groups of the longitudinal series consist of fairh- long and /-' , 

 slender bristles. In front of as well as behind the transverse 

 bar the skin is beset with a dense grotip of strong granules. 

 In front of the trebly divided laiiiiiia labialis (fig. 5 b) a 

 median longitudinal row of long and a lateral one of ver)- 

 delicate setae are obserx'ed; in the middle a row of very 

 short hairs is found on each side, single behind and 

 double in front. Between the serrulae 6-dentatae a longi- 

 tudinal lateral series, a median group and more posteriori)- a 

 transverse group of short setae are found ; behind the serrula 

 an oblique group was seen. The area labialis possesses a 

 central group of hairs between the labial lobes, partly 

 continued on the latter, which bear four fairlj- regular 

 rows of hairs. 



Text-fig. 9. Encalanns chngatiis Dana. 



a. (to the left above) f3. Labruin etc. X i8- 



b. f?. .'Vbdonien X iS. 



c. (to the right' fo". Labruni etc. X iS. 



d. fii". Abdomen X iS. 



e. YJ (St. V). Abdomen >; iS. 



f. to the right beneath:. YcT (St V) X iS. 



fc?. Size: 4'5— 5 mm. The fifth thoracic .somite is better marked out, and the lateral corner is 

 less produced than in the female. The head is in front of the trausver.se groove more strongly convex 

 (text-fig. 9c) and the labrum is lower; its oral surface is smooth; the labial appendages are lower. 

 The intestine is well developed with the usual convexit\- and coecal sacs. 



The oral appendages are, as shown by (jiesbrecht, greatly reduced. The legs of the fiftli 

 pair (fig. 5 c) are more slender than figured by Giesbrecht; the left leg wa.s, except in two spec- 

 imen.s, the longer. In a single male the terminal segments of the fifth pair pos.sessed a small median 

 hair in addition to the terminal one. The fifth pair of the young male has the left leg a little longer 

 than the right; the Re is divided into two distinct segments, of which the latter bears two long 

 bristles (fig. 5 f, cf. Wolfenden PL IX, fig. 3); in a single young? male the number of setae in the 

 terminal segment was 3 instead of 2 (fig. 5 d) and in another young (?) male the structure was, as seen 

 in fig. 5 e, more like that of the mature male. 



J? (V). Size: 4-5 mm. The lateral corner of the last thoracic .somite is like that of the iS- 

 The urosome consists of three somites, as the two basal ones (text-fig. 9 e) are fused in most specimens 



Tlic Int^oll'-Kxpcilition. III. (. ' 



