studies on mariiio Osti'arods 325 



rate length, mostly decreasing somewhat in lengtli the more posteriorly they are situated. 

 Bristles nos. 2 and 3 are of the same type, ratlier powerful and furnished witli two or three 

 oblique wreaths of long, stiff secondary bristles; the distal one of these wreaths continues right 

 tf) the point of the bristles. Bristles nos. 4 and 5 are very powerful and are furnished at the 

 middle with one or a few wreaths of long, stiff secondary bristles, distally with a few powerful 

 secondary teeth; these are most powerful on the first-mentioned bristle, on no. 5 they may 

 even be entirely absent. Second endite (fig. 16, cj = $): Of the five inner bristles nos. 1 and 5, 

 counting from the anterior side of the limb, are furnished at the middle with a wreath of long, 

 stiff secondary bristles, the other three have no such bristles. The three anterior ones are rather 

 powerful and of moderate length, nos. 2 and 3 somewhat shorter than no. 1; the latter bristle 

 is rather weakly pectinated distally, no. 2 seems to be quite bare (even with as strong magni- 

 fication as Reichert's ocul. 4, LeHz' immers. V12), no. 3 is sharply serrated distally. No. 4 is 

 only represented by a small, powerful, conical, bare chitinous spine; no. 5 is moderately long, 

 very powerful and has, distally of the wreath of secondary bristles, a few powerful spines. The 

 bristle on the anterior side of this process is short and has short hairs. The seven bristles of 

 the third endite (fig. 17, c? ^ ?) are of the same types as the five inner bristles on the second 

 endite. Bristles nos. 1, 2 and 6 on the third endite, counting from the anterior side of the limb, 

 are very like bristles nos. 1, 2 and 4 on the second endite; bristles nos. 3 and 5 on the former 

 endite are like bristle no. 3 on the latter; the posterior bristle on the third j^rocess differs from 

 the same bristle on the second only by having more secondary teeth distally; bristle no. 4 on 

 the third endite is rather strongly pectinated distally, it is usually quite without long secondary 

 bristles. The epipodial plate has from about thirty to forty bristles, all furnished 

 with long, soft hairs almost to their points. The protopodite has no distal chitinous spine 

 at all, which is specially noteworthy because a spine of this sort is developed on all the other 

 species of this sub-family that are dealt with in this work, as has been pointed out above, 

 p. 185 in the description of this sub-family. The exopodite has four joints. First joint: 

 The main tooth (fig. 18, c? = ?) consists of seven constituent teeth, the anterior one of which 

 is relatively somewhat stronger than in the other forms of this sub-family that I have investigated, 

 and, contrary to these, is completely united to the joint; the secondary teeth of the constituent 

 teeth are comparatively weak. The bristle on the posterior side of the joint near the main tooth 

 is about as long as that of the anterior constituent tooth from the point where the second 

 constituent tooth is situated and may or may not have long hairs at the middle, distally it has 

 short hairs. On the anterior side of the joint there are three bristles, two situated near the main 

 tooth, one somewhat farther out on the joint. Of the two former ones one is rather long and 

 powerful, its point reaches about as far as the point of the anterior constituent tooth; it is strongl}' 

 pectinated distally and has at the middle a wreath of long, stiff secondary bristles. The other 

 is only a little more than half the length of this one, rather weak, furnished with a wreath of 

 long stiff secondary bristles at the middle and short hairs distally. The outer bristle on this 

 joint is somewhat longer than the last-mentioned bristle and has long, soft hairs at the middle 

 and short hairs distally. The second joint has three a-bristles, three b-bristles, one c-bristle and 

 one d-bristle. The a- and b-bristles are moderately long and strong, the outer b-bristle is often 



