G. O. Sars. 



1. Streptoceplialus Purcelli, G. O. Sars, n. sp. 



(Pi. 1). 



Specific Characters.— Body in both sexes compara- 

 tively short and compact, with the anterior division fully as 

 long' as the posterior, including the caudal rami. Head in 

 female evenly rounded anteriorly, that of male with the 

 frontal margin slightly produced above the bases of the 

 antennae, though not forming any distinctly defined frontal 

 lobe. Segments of trunk simple. Genital region in female 

 equalling in length the first 2 caudal segments combined, 

 marsupial pouch long and slender, extending almost as far 

 as the last caudal segment, terminal lips abruptly bent, 

 beak-like. Tail, not including the caudal rami, scarcely 

 exceeding half the length of the preceding part of the body. 

 Eyes very large, pyriform. Antennæ in female short, each 

 terminating in a thin, tentaculiform point; those in male 

 scarcely attaining 1 / 4 of the length of the body, the median 

 flexible part not exceeding the basal part in length, terminal 

 chela moderately expanded, smooth, dactyli very unequal, 

 distant at the base, and having between them a small pro- 

 jection. Branchial legs with the basal plate distinctly ser- 

 rate, terminal lobe of endopodite without any denticles at 

 the inner corner, exopodite, except in the 1st pair, very 

 large, oblong. Caudal rami slightly differing in the two 

 sexes, being in female narrow lanceolate, and fringed all 

 round with ciliated setæ, in male sublinear, terminating in 

 an obtuse point, and having only the inner edge setiferous. 

 Length of female 14 mm., of male 15 mm. 



Remarks. — The present species is at once distinguished 

 from S. gracilis, described by the present author from Port 



