42 



form; carpal spine of the succeeding pairs very large and conspicuously cultriform. 

 Pleopoda well developed, both rami tipped by long natatory setae. Uropoda of 

 a similar structure to that in the 2 preceding species, though somewhat longer. 

 Length of female 1.45 mm. 



Remarks. — As to its general outward appearance, this species resembles, 

 on the whole, the 2 preceding ones, though the body is of a still shorter and 

 stouter form. It is, moreover, easily distinguished by the long and slender an- 

 tenna?, the structure of the chelipeds, and the presence of well-developed pleopoda, 

 wholly wanting in the female of the other known species. The carpal spine of 

 the 5 posterior pairs of pereiopoda is also considerably larger than in the other 

 2 Norwegian species. 



Occurrence. — I have met with this form occasionally in 3 widely-distant 

 places on the Norwegian coast, viz., in the Christiania Fjord, at Bekkervig, south 

 of Bergen, and in the Varanger Fjord at Vadso. Out of Norway, it has not yet 

 been recorded. 



