248 



The spawning-season is late, for adult females caught on Sept. 

 15*'' at Angmagsalik, still carried immature eggs measuring 

 2 — 2.8 mm. in diameter; the total number of eggs in a spawner 

 amounts to about 400. 



The numbers of fin-rays in 10 specimens are: D. 34 — 37 

 (D.41— 12; D.2 23— 26); A. 23— 27 ; P. 17— 18; ¥.1 + 3. 



Gasterosteidæ. 

 Gasterosteus aculeatus Linné. 



Tasiusak. In a pond near Nord Fjord, 10. 7. 1902. 7 specim. 



Angmagsalik. In a fresh-water lake. 1892. 2 specim. 



Кар Dan Öer (by Angmagsalik). In a lake. 18. 6. 1899. 

 10 specim. 



Danmark Ö. In a fresh-water lake. 24. 8. 1891 & 31.7. 

 1892. 11 specim. 



С Kruuse saw on Aug. 13* 1902 numerous specimens in 

 a pool at Kordlortok (near Tasiusak). 



On July ЗИ' 1892 it was seen by Bay (I.e. p. 54) in large 

 shoals in Danmark Ö, in quite shallow water. 



All the specimens before me belong to the variety gym- 

 nurus {^^Gasterosteus gymnurus» Cuv. Val. = «(т. dhnidiatus» 

 Reinhardt), as they have only a few laminae behind the ascending 

 osseous plates of the pelvis, generally 2, sometimes 1, rarely 

 3 or 4. It is also proved here that the almost naked Stickle- 

 back is a fresh-water form. — One specimen has 4 dorsal 

 spines. 



Of the 19 specimens from the neighbourhood of Angmag- 

 salik none is longer than 59 mm.; of the 11 specimens from 

 Danmark Ö the largest is only 47 mm. Thus the Three- 

 spined Stickleback does not seem to become nearly so large 

 on the East-coast of Greenland as on the West-coast where 



