io 6 COPEPODA 



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

 yi s 6); if this interpretation is right, the serrula 6-dentata (fig. 7 f s 7) perhaps corresponds to Ser. 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 furcal rami, which are about r2 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. Kruppi (text-fig. 26 e). In contrast to Canu's description of a young male of 

 G. caudani 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 Gaetanus Kruppi. 



Parasites and Abnormity. Sac-shaped parasites 4ike those described in G. tenuispinus 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 Iv. W. Yt. 1000 M. W. iy? (V). 



? 8f?. 



2 % 1904 St. 153 6 5 ° 2 o Iv. N. 27°i2-5 Iv. W. 5 f ?, 1 yd* (V). 



2I / 6 1904 St. 154 65^7 Iv. N. 27°io h. W. 1 f ?, 1 yo* (V). 



In the Atlantic south of Iceland. 



I2 / 7 1903 St. 164 62°io L. N. i 9 °36 Iv. W. 1 yd* (IV). 



IC / 7 1904 St. 183 6i°30 Iv. N. i7°o8 Iv. W. Yt. 1800 M. Wire 19 f& 1 yj (V). 

 2 V 5 1904 St. 104 62°47 L. N. i5°03 Iv. W. Yt. 1500 M. Wire 34 f?, 1 y# (V). 

 2 / 9 1904 St. 286 6i°4 9 L. N. i4°n Iv. W. Yt. 800 M. Wire 3 f?, 1 y? (V). 



In the Iceland-Faeroe channel. 



I2 / 5 1904 St. 78 6i°7 Iv. N. 9 °3o Iv. W. 3 f ?. 

 22 / 5 1904 St. 99 6i°i 5 Iv. N. 9 °35 Iv. W. 7 f ?. 



In the Atlantic, south-west of the Faeroes. 



*s/ 6 1905 St. 82 5i°oo L. N. n°43 Iv. W. Yt. 1200 M. Wire 270 f ?, 38 y ? (V), 15 y c* (V), 3 y ? (IV), 1 y <? (IV). 



Yt. 800 M. Wire 40 f$, 4 y$ (V), 3 yo* (V). 

 8 / 6 1905 St. 72 57°52 Iv. N. 9°53 L. W. Yt. 1500 M. Wire 180 f?, 23 y ? (V), 1 y<? (V), 1 y & (IV). 

 2I /s 1905 St. 165 6o°oo Iv. N. io°35 Iv. W. Yt. 1500 M. Wire 1 f?, 1 y$ (V). 

 2 % 1905 St. 88 48°Q9 Iv. N. 8=30 h. W. Yt. 300 M. Wire 2 f ?. 



