im TAOK SKOaSHKRO 



or loss lonjr. soft hairs. Tlic rciiminiiif; lour bristles on tlit-sc two joints arc niodcralrls Idiii;, 

 suboqual and ditTonMitiatvd as thin-walled, rather narrow or moderately wide, hare sensorial 

 lihunents. more or le.ss rounded distally. (About the same as in fifj. 10 of ('. symmclrica. If 

 nothinj: special is mentioned in the followin<i; descriptions of species, these bristles are of the type 

 reproduced for the .species just mentioned.) 



S e c o n d a n t e ii n a : — 



M a 1 e: - 1' 1 (1 I u p o (1 i t e: — This seems to be subject to very slight \ari;ilioii 



in this genus. In all the species investigated by me it was characterized by two processes, 



both situated near the exopodite. one laterally, the other medially. The lateral (me of these 



proces.ses is small, verruciform, and in most cases of about the same type and ])osition as in tiic 



adjoining Hg. 11 of C. $if7mnelncn. The medial one is considerably larger, in most cases inorc 



or less irregularly globular. It is most frequently of the same type mul jjosition as in tlie 



adjoining fig. 13 of ('. symmetrica; only in exceptional cases has this process another type. 



(Onlv in the latter case is this character specially mentioned in the following descriptions of 



species.) Exopodite: The first joint is in most cases of about equal thickness throughout 



its whole length, only in exceptional cases — and then this is specially mentioned in the following 



descriptions of species — of another type. The eighth joint is most frequently very short, 



sometimes even difficult to distinguish. The ventero-distal bristle of the fiist joint is hyaline, 



bare, in most cases bent vermiformly, narrow, of about the same width throughout its length, 



and about as long as the total length of the three following joints. The natatory bristles on the 



second to the eighth joints are all about the same length — the distal ones are only slightly shorter 



than the proximal ones. The distal part of these bristles — about a fifth to a seventh of the 



whole -- is bare, hyaline and extended like a lancet (about tlie same as in ])l. 5, 



fig. 9, Ct. W. MCller, 1894). The proximal part of these bristles has rather long natatory hairs 



almost down to the base. The end joint has three bristles. The relative lengths of these are 



subject to rather slight variation in the species of this genus that are described below. The 



ventral one is usually about as long as the exopodite and of about the same type as the natatory 



bristles on the preceding joints, but is furnished with somewhat fewer natatory hairs and is 



not lancet-shaped distally, though it is hyaline and bare. The two dorsal ones are rather 



narrow, of about equal thickness throughout their length and in most cases hyaline and 



bare; only in exceptional cases do these two bristles have short hairs. One of them is about 



as long as the total length of the five or six distal joints, the other is about twice as long; of. the 



accompanving fig. 12 of C. symmetrica. Endopodite: First joint: This is moderately 



large and somewhat irregular in shape. It is about as long as it is broad ; it is somewhat irregularly 



rounded posteriorly , its anterior side has two processes; one of these, the processus mammillaris, 



situated at about the middle of the anterior side, is moderately large or rather small, more 



or less conical, the other, situated somewhat distally of the former one, is somewhat larger, 



and is verruciformly rounded. This joint was of about the type reproduced in the adjoining 



figs. 13 and 14 of C. symmetrica in almost all the species of this genus described by me below; 



only in those cases where it is specially mentioned below was there any deviation from this type; 



it is, however, to be noted that the little verruciform appendage situated distally on the processus 



