288 T.\(iK Slv(.>(.iSHi;U(! 



thotwoinnoronos, allpoctinatod ilistally; on the middlo liristlc, wliirli is soiiiowhat niori' jioworfiil 

 than till" otliors. tlu' ptH-tination is rather coarse. In addition tiiese bristles have at the middle 

 one or two wreaths of King, stiff secondary bristles; the latter vary somewhat, sometimes 

 occurring on all the live bristles, sometimes only on the two inner ones. The third cndite 

 (fig. 17) has seven distal bristles, similarly rather pnwcrlul and of moderate length; (he ones 

 situated most distally are somewhat shorter than the others. They are. all weakly or moderately 

 strongly pectinated, and the three distal ones are usually furnished at the middle with one or 

 two wreaths of long, stiff secondary bristles, which do uot occur on the others. The proximal 

 bristle on the outside of this process is bare and about as long as the outside of the jirocess. The 

 bristle dorso-distally of the coxale is relatively long, rather considerably longer tlian the outer 

 distal bristle of tlie third eudite, being about half the length of the jmlp. Of the three 

 bristles on the boundary between the basale and the first endopodite joint the one that is 

 situated near the exopodite is rather long, being almost as long as the first endojjodite joint, 

 the one on the anterior edge of the palp is about as long as the outer-distal bristles on the third 

 endite, the one at the middle of the inside of the palp being somewhat shorter; all three have 

 short, fine hairs or are almost bare. Exopodite: The three bristles of the exopodite 

 have fine, long hairs at the middle and short hairs distally; the two distal of these bristles are sub- 

 equal, somewhat shorter than this branch, the proximal one is about half the length of these two. 

 Endopodite: (fig. 18) The chitinized postero-distal edge of the first joint projects slightly 

 and is only weakly lobed. Somewhat dorsaUy of this edge we find on the outside of this joint 

 two or three short, smoo.th bristles or processes of somewhat different lengths, of a strange hyaline 

 structure and directed upwards (shown in the figure by dotted lines). Distally on the anterior 

 edge of this joint there are two moderately long, subequal and rather weak bristles with short 

 hairs. Distally on the posterior edge there are three bristles, the posterior one of these being 

 moderately long but rather powerful, the anterior one, the shortest and weakest, only about 

 half the length of the former, all of them rather strongly pectinated distally. The end joint 

 is rather strongly chitinized and has thirteen bristles: Four a-bristles of moderate length, rather 

 strongly pectinated; three b-bristles of moderate length, of which the anterior one is of about 

 the same type as the a-bristles, the two posterior ones, on the other hand, being extremely powerful 

 and almost conical, with or without a few very powerful secondary teeth; three c-bristles of 

 moderate length, the posterior one being the longest and the anterior one shortest; these too 

 are of about the same type as the a-bristles; three d-bristles somewhat longer than the b-bristles 

 but in other respects of the same types as these bristles; the posterior d-bristle is like the anterior 

 b-bristle, the two anterior d-bristles are like the two posterior b-bristles. Pilosity: The first 

 endopodite joint has transverse rows of short, fine hairs. 



Fifth limb: — This is unusually elongated, the endites are comparatively widely 

 separated from each other in about the same way as is shown in C. Claus's reproduction of 

 Cypridina messinensis, 1865, pi. X, fig. 4. P r o t o p o d i t e: The first endite (fig. 19) has six 

 bristles, arranged in two groups separated by a rather large space, an anterior group of four 

 bristles and a posterior group of two. Of the former group one bristle is c[uite short and rather 

 weak, with short hairs, and is situated somewhat inside the others. The three others are rather 



