338 TAGE SKOGSBERG 



In other words the first joint is rather considerably longer than the total length of all the following 



joints, the second joint is about as long as the next two joints put together. The bristle of the 



second joint is somewhat longer than the eight distal joints and is furnished ventrallv with 



about seventeen or eighteen strong secondary teeth, dorsally with a somewhat smaller number 



of weak and short ones. The proportion between the length of the longest natatory bristles 



and that of the whole exopodite is about three to two. The natatory bristles are furnished with 



broad, well developed natatory hairs. The end joint has four bristles of wliich the dorsal 



one is about as long as the total length of the si.x or seven distal joints and is furnished with 



well developed long natatory hairs. The second to the ninth joints have powerful and rather 



long conical basal spines, which decrease somewhat in length the more proximally they are 



situated, the one on the second joint being rather small, those on the fourth to the eighth joints 



are equal to or even exceed the length of the following joint. The e n d o p o d i t e is well 



developed and is of exactly the type reproduced for ('. (Vargula) norvegica. The first joint has 



a group of foiu- bristles proximally, one of which is somewhat more than twice the length of 



the three others and is somewhat sliorter than the second joint; this joint has, in addition, 



ventrally at the middle a single bristle, which is somewhat longer than the longest proximal one. 



The second joint has ventero-distally a single bristle, which is not quite as long as the end joint. 



This bristle, like the two long ones on the first joint, has short hairs; the three short proximal 



ones are bare. The distal bristle of the end joint is not quite twice as long as the endopodite. 



Mandible (fig. 6): — Protopodite: The endite on the coxale has very 



numerous spines; it is weakly bifurcated distally; the two distal jjoints are somewhat, though 



only rather slightly, coarser than the other spines and like these they are smooth. Basale: 



This has seven bristles ventrally: two a-bristles, one b-bristle, two c-bristles and two d-bristles. 



Of these the a-, b- and c-bristles are very short; the longer of the d-bristles is about as long 



as the second endopodite joint, the other is about V4 — Vs of tbis length. Of the three dorsal 



bristles the proximal one is attached a short distance in front of the middle of the joint 



and is somewhat shorter than the longest d-bristle; the longest distal bristle is about as 



long as or somewhat longer than the mentioned d-bristle, the other distal bristle is less than 



half the length of its neighbouring bristle. All three are of the same t}'pe as the long 



d-bristle, i. e. they have long secondary bristles arranged in irregular wreaths and 



have short hairs distally. The exopodite is about as long as the dorsal side of the 



first endopodite joint; of its two bristles the proximal one is of about the same length 



and type as the shorter of the distal bristles situated dorsally on the second protopodite joint; 



the distal one, on the other hand, is very short, extending only slightly beyond the point of the 



exopodite, and has short, stiff hairs situated very close together distally. Endopodite: 



Of the four ventral bristles on the first joint the two longest are of about the same type as the 



long bristles on the second protopodite joint, i. e. they have long secondary bristles arranged 



in irregular wreaths; the two others have short hairs. Second joint: On the anterior side there 



are a great number of bristles of different types. Some of these, about eighteen, are more or 



less long; among these tliere are some wliicli have long, stiff secondary bristles arranged 



in irregular wreaths, distally of which there are close (as in the specimen shown in tig. 7) ov 



