On the genus Bro teas of Loven. — Broteas falcifer. 9 



Of these the first 2 are somewhat larger than the next 

 succeeding ones, and this may probably have induced Loven 

 to regard them both as double. With the exception of 

 these 2 articulations, the joints, on the whole, increase 

 gradually in length distally; but the 3 outer joints are again 

 somewhat shorter than the next preceding ones, the last 

 joint being the smallest of all, and carrying at the tip a 

 bunch of moderately long bristles. Anteriorly all the joints 

 are provided with scattered setæ of somewhat unequal size , 

 and extending in different directions, some of them being 

 of considerable length. Moreover, the 3 outer joints, pre- 

 ceding the last one, each carry posteriorly a single seta. 

 In preserved specimens, these antennæ are generally reflexed 

 and closely appressed to the body; but in the living state 

 of the animal, they have undoubtedly admitted of being 

 spread out laterally, as indicated in fig. 1. 



The posterior antennæ (fig. 5) are comparatively less 

 fully developed than in most other Diaptomidæ, though 

 consisting of the same chief parts. The basal part is greatly 

 constricted at the base and very movably connected with the 

 body. It consists of 2 joints, which, however, are not very 

 perfectly defined. The 1st joint is rather small, and carries 

 at the end anteriorly a short ciliated seta; the 2nd joint 

 has 2 similar setæ at the end, and exhibits posteriorly, at 

 about the middle, a well-marked, almost rectangular ledge, 

 to which the outer ramus is attached. The inner ramus, 

 forming the immediate continuation of the basal part, is, as 

 usual, composed of only 2 joints, the 1st of which is some- 

 what shorter than the basal part, and scarcely longer than 

 the last joint, whereas in other Diaptomidæ this joint is 

 generally much elongated. It carries anteriorly 2 short setæ 

 at some distance from the end, but is otherwise naked and 



