On the genus Broteas of Loven. — Broteas falcifer. 25 



biilboiisly dilated at the base, 4 issuing from the rounded 

 tip of the ramus, the 5th from the outer edge; only the 

 outermost seta of right ramus transformed in male. Anterior 

 antennæ scarcely longer than the anterior division of the 

 body; last joint of right prehensile antenna of male simple, 

 without any terminal projection. Posterior antennæ with the 

 outer ramus about the length of the inner, its terminal joint 

 very short, scarcely exceeding V^ oî the length of the ramus. 

 Posterior maxillipeds not nearly so large as in the prceding 

 species, being scarcely more than twice as long as the anterior, 

 terminal part with the apical spines much less strong and 

 somewhat unequal in size. Natatory legs with the terminal 

 spine of outer ramus comparatively short. Last pair of 

 legs in female with the inner ramus distinctly biarticulate, 

 outer ramus with the middle spine of last joint not incurved ; 

 left leg of same pair in male rather small, not extending to 

 the end of the penultimate joint of the right one, inner 

 ramus of both legs distinctly defined, though of rather 

 different size; proximal joint of outer ramus in left leg with 

 3 diverging spines, none of which is of any considerable 

 size. Terminal claw of right leg of moderate length, scarcely 

 flexuous, outer spine rather strong. Length of female 3 mm. 

 of male 2.7o mm. 



Remarks. — As shown by the above diagnosis, this 

 form exhibits numerous well-marked differences from the pre - 

 ceding one; but in the more essential characters both forms 

 evidently agree with each other so closely, that they cannot 

 properly be referred to different genera. The genus Paradiap- 

 tomus therefore ought to be rejected, and regarded as merely 

 a synonym to Broteas Loven. 



