On the genus Broteaa of Loven. — Broteas fal cif er. 1 7 



both distinctly articulated to the joint, the outer one, answering 

 to the small terminal joint in Diaptomus, pointing obliquely 

 outwards, whereas the other is bent inwards, so as to cross 

 the terminal claw. Both these spines have a very small 

 secondary denticle at the base. The inner ramus is rather 

 small, forming a simple, narrow cylindrical appendage, which 

 does not reach to the end of the proximal joint of the outer. 

 It is uni-articulate and carries on the the tip 2 short equal- 

 sized spines. 



Description of the male. 



The length of the largest specimens examined is about 

 472 mm., and accordingly the male does not quite attain 

 the size of the female, from which, moreover, it is easily 

 recognized by the prehensile character of the right anterior 

 antenna, the stucture of the last pair of legs, and the 

 shape of the tail. 



The general form of the body (see fig. 3) is, on the 

 whole, more slender than in the female, and the anterior 

 division appears more narrowed behind, especially when the 

 animal is viewed from the dorsal face. Moreover the lateral 

 lobes of the last jpedigerous segment are much smaller, 

 and are evenly rounded. The posterior division, or tail, is 

 comparatively longer and more slender, exceeding in length 

 half the anterior division, and it is composed of 5 well-defined 

 segments besides the caudal rami. Of the segments, the 1st 

 is rather short and slightly asymmetrical, being more promi- 

 nent on the left side, where the genital orifice occurs. 

 The other segments are of nearly equal size, or the last one 

 is somewhat shorter than the 3 preceding ones, which are 

 of simple cylindric form. 



