57.) T.UiK SKOUSISKUC. 



bristle. All the ciglit ilistjil joints aro short and diffor rather sli<,'htly in leiifjth. K n d o- 

 p II d i t e: Tins is relatively short; it has three joints in the male, and often two in the female, 

 owin" to the joining of the second and third joints. The end joint of this branch in the male 

 is always situated at the side »)f (i. e. not distaliy on) the second joint and is in most cases bent 

 like a hook (in e.xeeptional cases, viz. in the genus Euconchoecia, this joint is straight on the left 

 second antenna); on it one can often distinguish a proximal and a distal shank, which form 

 a deciiled angle with each other; sometimes the distal shank is more or less distinctly bent at an 

 angle. In the female this joint is exceedingly small, sometimes not perceptible, and, as lias 

 been pointed out above, often quite joined to the original second joint; the bristles that 

 belong to it scarcely ever issue distaliy on the second joint but in most cases somewhat proximally 

 of the bristles belonging to the original second joint (i. e. they have a position similar to that 

 of the end joint on the male endopodite). The first joint has two short, pointed bristles of the 

 ordinary type in both sexes. The bristles on the second joint vary somewhat in number, but 

 there alwavs seem to be two long bristles developed distaliy on the joint both in the male and 

 the female. The third joint in the male always has three bristles. The same number is usually 

 found in the female, only in exceptional cases (some species of the genus Euconchoecia) is there 

 a smaller number in this sex. One or more of the bristles of the (original) second and third joints 

 are developed, both in males and females, as sensory bristles. This branch is never used as 

 a locomotory organ; the end joint is used in the males for seizing and holding fast the females. 

 Mandible: — This has rather weak dimorphism, sometimes even none at all. — 

 Protopodite: Coxale: The pars incisiva is always furnished on the anterior side with a 

 very powerful, more or less broadly triangular process, against which the endite on the following 

 joint rfsts with an antero-inner edge (= ,,Zahnh6cker", according to C. Claus's terminology, 

 1891 a; see, for instance, p. 24). The pars incisiva is flattened distaliy and is cut off somewhat 

 obliquely; its distal edge is armed with a number of teeth situated in a row (= ,,Zahnrand", 

 according to C. Claus's terminology, 1891 a). Inside (or, more correctly speaking, dorsally 

 of, when the limb is in a position of rest), about parallel to and somewhat proximally of this 

 margin there are two tooth-lists joined fast to each other (= „Proximale und distale Zahnleiste", 

 C. Claus, 1891 a) attached by a ginglymus joint; these tooth-lists are as a rule not quite as broad 

 as the distal edge of the endite. Proximally of these tooth-lists the pars incisiva is furnished with 

 a somewhat cushion-like masticatory process which varies very much in its development, some- 

 times being very small, but apparently never quite absent (= ,,Zahnplatte" or ,,7ahnwidst", 

 C. Claus, 1891 a). In other respects the pars incisiva differs rather much in structure in different 

 genera. This j oint is quite without bristles except close to the masticatory cushion just mentioned on 

 the pars incisiva. Basale: In most cases this is about as long as or rather slightly shorter or 

 longer than the two following joints and somewhat higher posteriorly than it is anteriorly. The 

 distal edge of the endite always has a row of six moderately large and in most cases powerful 

 teeth, armed with secondary teeth; sometimes the number of these teeth is apparently increased 

 because the main tooth is only slightly greater than its secondary teeth (cf. fig. 10 of Conehoecia 

 Gaussi below). Behind these teeth there are two rather short, moderately strong processes, 

 one situated somewhat behind the other; the anterior one of these is always of the tube-bristle 



