5S8 TAGE SKOGSRERG 



joints, the third, the ventral one, is a little longer still and of the same type as the natatory 

 bristles on the preceding joints, but has somewhat fewer natatory hairs. Endopodite 

 (figs. 10 and 11): Of the a- and b-bristles on the first joint the latter is often about half as long 

 as the breadth of this joint, the former is only half the length of the b-bristle or still shorter; 

 both are bare or almost bare. Second joint: The c- and d-bristles are somewhat shorter and 

 weaker than the b-bristle and have short and exceedingly fine hairs or are bare. The f-, g-, 

 h-, i- and j-bristles are of the same types and relative lengths as have been stated by Ct. W. Muller, 

 1906 a; see pi. VII, fig. 26. The g-bristle is about as long as or somewhat longer than the proto- 

 podite; it varies somewhat in width. The f- and g-bristles are furnished with sparse and very 

 short hairs, the h-, i- and j-bristles are bare. Proximally on the end joint (proximally of the 

 h-bristle) there is a low peg, which is sometimes rather difficult to verify with certainty. The 

 clasping appendage of this joint is subject to only rather slight variation; it is always (even 

 in the small specimen) of the types reproduced in the accompanying figs. 10 and 11. It has 

 about six to ten transverse folds distally, and sometimes there is a small process distally, as 

 in pi. VII, 21, G. W. MiJLLER, 1906 a. Pilosity: The first endopodite joint is partly furnished 

 with short hairs. 



M a n d i b 1 e (fig. CXIV): — P r o t o p o d i t e: Coxale: Tlie toothed edge of the pars 

 incisiva has, apparently constantly, eight simple, smootli, triangular teeth, the most posterior 

 one of which is rather large and powerful; the others are of moderate size, either subequal or 

 else decreasing somewhat in size the more posteriorly they are situated (almost constantly of 

 about the type reproduced in fig. 19). The distal tooth-list, which is not inconsiderably narrower 

 than the toothed edge of the pars incisiva, is furnished posteriorly with a large and powerful, 

 smooth, tusk-like tooth and in front of this a row of about 15 — 19 smooth triangular, rather 

 small, often subequal teeth. The proximal tooth -list is rather juirrow, in most cases only about 

 a third of the width of the toothed edge of the pars incisiva, and is fixed at about the middle 

 of the distal tooth-list; it consists of about five to ten triangular, smooth teeth, varying somewhat 

 in size and type. The masticatory pad is very small, almost completely reduced and of a somewhat 

 irregular type, varying in shape in different individuals. Close to (behind) the masticatory 

 pad there is one (rarely two) somewhat lancet-like or leaf-like chitinous appendage of moderate 

 size, which was homologized by C. Claus, probably correctly, with a ,,Stachelzahn". Proximally 

 of these ap^sendages there is a group of moderately long, rather narrow, stiff hairs; cf. the accom- 

 panying fig. 18. Basale: Of the six teeth on the distal edge of the endite the five anterior ones 

 are usually subequal and of moderate size; they are triangular and have rather strong secondary 

 teeth proximally; the posterior one is in most cases somewhat smaller than the former ones, 

 but approaches their type. The two posterior processes on this edge are subecjual and moderately 

 strong; both have short hairs; the distal one is of the tube-bristle type, the proximal one, which 

 is rather considerably displaced proximally, (see the accompanying fig. 22) is pointed. The 

 solitary tooth on the outside of this endite is situated proximally of the first and second distal 

 teeth (counting from in front); in most cases it is somewhat smaller than these, triangidar and 

 smooth. Of the four bristles on this endite three are situated, as mentioned above, on tlie oucside 

 of (he process, the fourth on the anterior edge of the process, in most cases somewhat distally 



