92 COPEPODA 



inner margin of the second basipodite of pes IV a few lamellous setae like those of the adult females 

 were found in the young females, but in the males a few marginal hairs of usual structure were found. 

 The fifth pair of legs in the males is as seen in fig. 8 a (PL II) rather slender. 



Y$ (St. IV). Size: A single female from Thor St. 165 1905 measured 2 - o6 mm.; anterior di- 

 vision 1-67; urosome 0-39 mm. The antennulae reached to base of furca; the shape of the body is in 

 the main like that of the adult females, but the abdomen has as usual only three somites. The 

 structure of the appendages was not examined in details. 



Parasites. In several adult females of this species curiously twisted bodies (text-figs 22 h j) 

 to the number of one or two were found, now on the right and now on the left side; they are by a 

 delicate stalk fastened to the skin of the body wall between the insertion of the maxillae and maxil- 

 lulae; their content is finely granular. About their nature I do not at present wish to express 

 any opinion. They were found in the following number of adult females from 5 stations viz. i from 

 Ingolf St. 20, 25 from Thor St. 152 '9/ 6 1904, 20 from Thor 2I /e St. 153 and 4 from IO / 7 1904 St. 78. 

 At St 152 and 153 they was generally found together with the "parasites" to be described. 



In a great number of adult females of this as well as of the following species elongate obovate 

 bodies (text-figs 22 e f) were observed; they are by a stalk and a terminal disc fastened to the chitin 

 of the maxillulae (in a specimen from Ingolf St. 19 f. inst. to a seta of Le), but especially of the max- 

 illae. These structures are of somewhat different shape in the various animals, with the tip more or 

 less pointed; they consist of a transversely striated wall, which, in contrast to the stalk, is dissolved 

 into a solution of potash and a content with vacuoles but without distinct nuclei in glycerin prepara- 

 tions. The stalk is hollow and widened out towards the sac, which is here more or less pointed. 



These structures were sometimes found on the left sometimes on the right side to the number 

 of one to four; they were found in the following number of specimens in one sample from Ingolf, and 

 in ii from Thor: viz: Ingolf St 19 2 specimens; Thor St. 152 ('9/6 1904) 25 specimens, St. 153 ( 2 % 

 1904) 20, St 154 ( 2 </ 6 1904) 3, St. 78 ("Y 7 1904) 8, St. 285 0/9 1904) 5, St. 214 ( 22 / 7 1904) i, St. 183 

 ("/ 7 1904) 6, St. 104 ( 2 4/ 5 1904) 10, St. 164 ( 2 9/ 8 1905) i and St. 72 ( 8 /6 1905) 3 specimens. It is rather 

 curious to notice that the distribution of these "parasites", which iu some features are not unlike 

 spermatophors, is very irregular within the area; they were most common in Denmark Strait, and 

 very scarce at the southern stations. At the station (Thor 9/ 5 1904 St. 70) at which the greatest num- 

 ber of specimens of G. tenuispiuus viz 890 f $ were collected, these structures were not observed. 



Occurrence. The Ingolf Exp. has gathered this species at the following stations in 

 Davis Strait. 



2 5/6 1895. St. 24. 63o6 L. N. 56oo L,. W. V. 1 200-0 fathoms. Temp, at surface 4-2 C. i f?. 



26 / 6 1895. St. 25. 633o L. N. 54^5 L. W. V. 1 200 -o fathoms. 2-9 C. if?. 



V 7 1895. St. 27. 6454 L. N. 55io L. W. V. 1 200-0 fathoms. 3-9 C. i f ?. 



In the Atlantic south-east of Greenland it has been taken at 2 stations. 



20 / 6 1895. St. 20. 5820 L. N. 4o48 L,. W. V. 1 2000 fathoms. Temp, at surface 6-1 C. 2 f?. 



l8 /6 1895. St. 19. 6o29 L,. N. 34i4 L. W. V. 1 300-0 fathoms. 9 C. 5 f?, 



i y? (V); iyc?(V). 



