I06 COPEPODA 



dinal group medially to the seirula 6-dentata and the inner series in front of the lamina (cf. PI. II fig. 

 yf s 6); if this interpretation is right, the serrula 6-dentata (fig. 7 f s 7) perhaps corresponds to Sen 4. 



Y^ (Stage V). Size of female from Thor St. 82 was 574, anterior division 4-2 mm., urosome 0-87. 



The relative length of the abdominal somites and the fnrcal rami, which are about i-2 as 

 long as wide, is 20, 23, 18, 20 and 17. The appendages show similar differences from those in the 

 adult as G. Kruppi] the lamina of the second basipodite of the maxillipeds is shorter and more rounded 

 (text-fig. 26 d); but the inner margin of basip. II pes IV is smooth; the fifth pair of legs is in main 

 features like those of G. Kritppi (text-fig. 26 e). In contrast to Canu's description of a young male of 

 G. caudaiii the Re I — II of pes I are completely fused without Se Re I. 



Y ^ (St. IV). Size of a male from Thor St. 82 was 372 mm., anterior division 3-01 mm., urosome 

 071 mm.; a female measured 3-5 mm. 



The relative length of the abdominal somites and furca was 19, 18, 24 and 13. The anten- 

 nulae extend at least 8 segments beyond the end of the abdomen; the differences in the other appen- 

 dages are scarcely different from those described in Gactanus Kriippi. 



Parasites and Abnormity. Sac-shaped parasites like those described in G. tenuispinns were found 

 in one specimen from Thor St. 78 and 99, in 5 from Thor St 183, in 28 adult females from Thor 

 St. 82 (Yt. 1200 M. W.) and in 60 from St. 72. In a single adult female the setae of the right caudal 

 ramus was branched (text-fig. 26 b). 



Occurrence. The Ingolf Expedition has not gathered this .species, but it has been captured at 

 the following stations by the S/S Thor in Denmark Strait. 



'9/6 1904 St. 152 65°oo L. N. 28°io L. W. Yt. 1000 M. W. i y ? (V). 



? 8 f?. 



^% 1904 St. 153 65°2o L. N. 27°i2-5 L. W. 5 f?, i yd" (V). 



^■/fi 1904 St. 154 65°27 L. N. 27°io L. W. i f?, i yd* (V). 



In the Atlantic south of Iceland. 



'V7 1903 St. 164 62°io L. N. i9°36 L. W. i yd" (IV). 



■■/7 1904 SL 183 6i°30 L. N. i7"o8 L. W. Yt. 1800 M. Wire 19 f?, i yd* (V). 



24/5 1904 St. 104 62°47 L. N. i5°o3 L. W. Yt. 1500 M. Wire 34 f?, i yd* (V). 



Vg 1904 St. 286 6i°49 L. N. i4°ii L. W. Yt. 800 M. Wire 3 f?, i y? (V). 



In the Iceland-Fseroe channel. 



'2/5 1904 St. 78 6i°7 L. N. 9°3o L. W. 3 f ?. 

 "A 1904 St. 99 6i°i5 I.. N. 9°35 L. W. 7 f ?■ 



In the Atlantic, south-west of the Faeroes. 



'5/6 1905 St. 82 5i°oo L. N. ii°43 Iv. W. Yt. 1200 M. Wire 2701?, 38y? (V), 15 yd* (V), 3 y? (IV), i yd" (IV). 



Yt. 800 M. Wire 40 f ?, 4 y? (V), 3 yd" (V). 

 76 1905 St. 72 57°52 L. N. 9°53 L. W. Yt. 1500 M. Wire 180 f?, 23 y ? (V), i yd" (V), i yd" (IV). 

 "/s 1905 St. 165 6o°oo L. N. io°35 L. W. Yt. 1500 M. Wire i f?, i y<? (V). 

 ^°/6 1905 St. 88 48°09 L. N. 8=30 L. W. Yt. 300 M. Wire 2 f ?. 



