On the genus Broteas of Loven — Broteas falcifer. ]^5 



denticulated spines outside and at the tip. As in other 

 Copepods, the 2 legs of each pair are held together by an 

 intermediate quadrangular plate, so as only to admit of 

 being moved simultaneously. In structure they resemble, on 

 the whole, those in the genus Diaptomus, the 1st pair differ- 

 ing in some particulars rather pronouncedly from the others. 

 This has been overlooked by Loven, who describes them 

 as being all of the very same structure, and as only the 

 1st pair were examined at all closely, he erronously transfers 

 the characters of that pair to the others. The differences 

 between this pair and the 3 succeeding ones are at once 

 seen, on comparing the figs. 11 and 12 of the accompanying 

 plate, which represent a leg- of the 1st and the 4th pair 

 drawn to the same scale. 



The 1st pair of legs (fig. 11) are considerably smaller 

 than the others, and have the basal part comparatively 

 shorter and broader, being composed, as in the other pairs, 

 of 2 flattened joints, the 1st of which carries at the end 

 inside a densely plumous seta. Of the rami the outer one 

 is 3-articulate, whereas the inner one only consists of 2 

 joints. The 1st joint of the outer ramus is larger than the 

 other 2 and somewhat club-shaped, being constricted at the 

 base and gradually widening distally. It carries at the end, 

 outside, a strong deflexed spine and inside a natatory seta. 

 The 2nd joint has no spine outside, but inside a natatory 

 seta similar to that on the 1st joint. The last joint is 

 somewhat longer than the 2nd, but rather narrow. It has 

 outside 2 rather small denticulated spines and at the tip a 

 much longer spine, which, however, is without denticles and 

 terminates in a thin flexible point. Inside, this joint carries 

 4 natatory setæ. The inner ramus is somewhat shorter than 

 the outer, and without any spines. Its 1st joint has only a 



