﻿242 



COPEPODA 



1905. Phaenna spinifera Claus. G. O. Sars, p. 5. 



1905. — — — Farran, p. 47. 



1906. — — — Pearson, p. 21. 

 1908. — — — Farran, p. 47. 



1998. — — — V. Bremen, p. 56 fig. 63. 



1909. Phaenna spinifera Claus. Pesta, p. 22. 

 1909. — — — A. Scott, p. So. 



1911. — — — Wolfenden, pp 285— 2S6. 



1912. — — — Pesta, p. 24. 



Description, f^. Size of specimen from Thor St. 82 wa.s Z'gmm. ; anterior division 2'42; uro- 

 some 0-48 mm. Giesbreclit's specimens measured i-8 — 2'i mm. 



In some of tlie examined specimens the head possesses dorsally, as seen in text-fig. 79, a conical 

 protuberance. 



The interior lobes of the maxillar are placed very near to each other, the Lob. i has 5 setae, 

 the Lob. 2 has 3, and the Lob. 3, which is very short, has probably 3 setae as well; the fourth lobe 

 has at least 2 setae, of which the one is comparatively strong, and distinctly curved, and the fifth 

 lobe has in addition to fairly strong claw-shaped setae two short slender ones; the endopodite has seven 

 comparatively short and thick brush-shaped setae, distally apparently fused, in addition to a long and 

 slender pointed one. 



The legs are scarcely different from Giesbrecht's description. Tlie outer margin of the third 

 outer segment of the Jir.st /oof has proximally to the middle a small incision and a glandular pore. On 

 the anterior surface of the third inner segment of the second and third pairs of legs a 

 minute glandular pore was found, but in the fourth pair none was seen. At the base 

 of the outer spine in the Re H, and at tlie base of Se I and III Re IH, glandular 

 pores were found in the second pair of legs, and in the third and fourth pairs at the 

 base of Se Re I as well. The Ri II ~ III, which are fused in the second pair of legs, 

 possess on the posterior surface two coronas of 8 and 6 long spines respectively, the 

 Ri II and III of the third pair of legs have 8 and 6 spines respectively, and the Ri II 

 of the fourth pair of legs has 6 long rather weak spines. 



The ver\' short lahruin and the elevation in front of it are only indistinctly 

 separated, and the latter is placed just behind tlie insertion of the antennulae; the epi- 

 stoma is covered by a number of longer and shorter setae; on the labrum proper a trans- 

 verse group of fairly short setae is found; the marginal setae are only poorly developed (PI. VII fig. i a). 

 The oral surface (fig. 1 b) has in front 4 longer and shorter oblique groups of shorter hairs converging 

 towards the middle, and more posteriori)-, probabl>- composed of the three hinder, a longitudinally placed 

 elongated group of .short hairs is found. In the middle at least three groups of very short hairs or 

 granules are found. The lamina labialis is only poorly developed (PI. VII fig. 1 c); in front of it a 

 regular granular area is found; the area behind the lamina and on the labial lobes was not studied 

 in details (cf. fig. i c). 



fd*. Size of .specimen from St. 82 was 2-26 mm.; anterior division 1-89 mm.; urosome 0-37 mm. 

 Giesbrecht's specimen measured 18 mm. 



The anterior division did not possess a lanielliform projection, as figured and described by Gies- 

 brecht. No dorsal protuberance was found. 



Y$ (St. V). Size of specimen from Thor St 82 was 2-3 mm. 



The only difference was found in the different structure of the abdomen. 



Text-fig. 79. 

 Phanina spini- 



fe?-a Claus. 

 f 9- Lateral out- 

 line of body 

 X 18. 



