40 

 1. Pseudotanais forcipatus (Lilljeborg). 



(PI. XVII, fig. 1.) 

 '/'auaix l<nr'n>h<N. Lilljeborg, 1. c. p. IB. 



Characters. Body of female scarcely more than 4 times as long 

 as it is broad, in male still shorter and stouter. Cephalosome greatly narrowed 

 anteriorly, with the front transversely truncated. The first 3 segments of meso- 

 some combined not exceeding the length of the 4th segment, which about equals 

 in size the 5th, both being quadrangular in shape; last segment much shorter. 

 Metasome in female about the length of the last 2 segments of mesosome com- 

 bined, and slightly narrowed distally, terminal segment obtusely rounded at the 

 tip ; that in male much more fully developed, equalling about y 3 of the length of 

 the body. Eyes in both sexes wholly wanting. Superior antennae about the length 

 of the cephalosome, basal joint not quite attaining the length of the other 2 com- 

 bined, last joint longer than the middle one. Chelipeds very large, attaining al- 

 most half the length of the body, hand twice as long as the carpus, fingers very 

 narrow, equalling the palm in length, and nearly straight, but distinctly forcipate, 

 the thumb being deeply sinuated at the base inside. First pair of pereiopoda with 

 the propodal joint conically tapered, dactylus very slender, setiform; carpal spine 

 of the succeeding pairs not very large. Pleopoda in female wholly wanting. 

 Uropocla but little longer than the terminal segment of the metasome, outer rauius 

 much shorter and narrower than the inner. Length of female 1.40 mm., of male 

 1.00 mm. 



Remarks. - - This is the first recorded species, and may therefore be re- 

 garded as the type of the genus. It is easily recognized by the forcipate cha- 

 racter of the chelipeds, not found in any of the other species, and equally dis- 

 tinct i* both sexes. 



Occurrence. The species occurs along the whole Norwegian coast, as far 

 north as Kvalo, but nowhere in any abundance. 



Distribution. Bohuslan (Lilljeborg), Oresund (Meinert) 



2. Pseudotanais Lilljeborgi, G. 0. Sars. 



(PI. XVII, fig. 2.) 

 Pseudotanais Lilljeborgi, G. 0. Sars, 1. c. p. 48. 



Specific Characters. Q. Body somewhat more robust than in the prece- 

 ding species, being scarcely 4 times as long as it is broad, and conspicuously de- 

 pressed. Cephalosoime rather large, and less abruptly narrowed anteriorly, front 



