On the genus Broteas of Loven. — Broteas falcifer. 13 



aud at the tip a restricted number of strong ciliated setæ, 

 4 on the proximal lobule, 2 ou the distal one. The 2 suc- 

 ceeding joints are very short, and each project anteriorly to 

 a similar lobule carrying a claw-like spine and 2 ciliated 

 setæ. The 4th joint is again considerably larger and some- 

 what widened distally, being armed on the anterior, some- 

 what produced corner, with a rather strong spine and 2 

 unequal setæ. The 3 outer joints, which represent the 

 terminal part, rapidly diminish in size, and are armed with 

 very strong claw-like spines curving anteriorly. 



The posterior maxillipeds (fig. 10), which in the genus 

 Diaptomus and most other Diaptomidæ are of a rather 

 delicate structure, are exceedingly strong in the present form, 

 constituting very powerful preying organs. They are nearly 

 3 times as long as the anterior maxillipeds, and are gener- 

 ally strongly curved in such a manner, that the coarse 

 apical claws are brought into close approximation to the oral 

 orifice (see fig. 1), Of the 5 joints composing them, the 2 

 first constitute the basal part, the last 3 the terminal part. 

 The first basal joint is almost cylindric in form, though 

 widening a little distally, and it projects at the end anteriorly 

 to a short lobe, carrying 3 curved setæ of moderate length. 

 3 similar setæ are seen more proximally attached to a slight 

 prominence, and above them there are 3 others placed more 

 widely apart. The 2nd basal joint, which generally forms an 

 an obtuse angle with the 1st, is considerably larger and 

 oblong fusiform in shape, being greatly constricted at the 

 base, and somewhat dilated in the middle. It carries an- 

 teriorly 3 spiniform setæ, the largest of which is attached 

 near the tip, the other 2 at about the middle; immediately 

 above the latter, a very fine ciliation of the margin is observed. 

 Within this joint there are 2 strong muscles, originating from 



