18 



Occurrence. The only place on the Norwegian coast where I have met 

 with this form, is at Fredriksvarn, outside the Cbristiania Fjord. It there occurred 

 not unfrequently in a few fathoms depth, on a sandy bottom partly overgrown 

 by algae. 



Distribution. English coast (Brady), Scottish coast (Scott). 



8. Canuella fureigera, G. 0. Sars, n. sp. 



(PL X). 



Specific Characters. Female. Very like the preceding species, but with 

 less deep instrictions between the segments and with the urosome more abruptly, 

 attenuated. Genital segment with 2 small juxtaposed lanceolate lappets below. 

 Caudal rami much larger than in C. perplexa, equalling in length the 3 posterior 

 caudal segments combined, and generally greatly divergent, each with a well- 

 marked carina along the dorsal face, middle apical seta more than twice as long 

 as the outer one, both very indistinctly ciliated. Structure of the several append- 

 ages almost exactly as in C. perplexa. 



Male resembling that of the typical species, though having the genital 

 segment comparatively more expanded, and the caudal rami much larger. 



Colour yellowish gray, with a few interrupted transversal bands of a deep 

 ochraceous hue. 



Length of female 1.40 mm., of male 1.25 mm. 



Remarks. Though very closely allied to the typical species, this form 

 may at once be recognized by the much fuller development of the caudal rami, 

 which to some extent seem to be mobile, as in some specimens they are found 

 to be greatly divergent, in others pointing more backwards. Moreover the in- 

 strictions between the segments are less conspicuous than in C. perplexa, and the 

 urosome, at any rate in the male, is more abruptly attenuated. 



Occurrence. I have not infrequently found this form in the upper part 

 of the Christiania Fjord, not far from the town, in depths ranging from 2 to 7 

 fathoms, muddy bottom. 



