TAGR SKOaSBERO 



an/. 



three bristles. Of the two joints of the e n d o p o d i t e the proximal one is large and powerfiil; 

 the distal one is directed somewhat inwards, small, but rather powerful, armed with 

 numerous powerful bristles (with the exception of the males of tlie sub-family Philomedinae). 

 With regard to the differences between the previous authors' interpretations of the 

 different parts of this limb and that which is followed in this work, see above p. 31. 



Fifth limb: — Cf. fig. IV, p. 39. With or without sexual dimorphism. — It 

 is short, foliaceous and developed as a powerful masticatory f)rgan. Exceptions are the males 

 of the sub-family Philomedinae, in which tliis, like the preceding limb, is fitted with very 

 weak masticatorv parts and in which it can certainly not be used for mastication of food. The 

 p r o t o p o d i t e is powerful, dominates somewhat over the exopodite, is united rather much 

 with the body, is generally only rather weakly divided into two or three joints and is directed 



vertically. On the inner edge it is armed with three powerful, 

 although rather slightly projecting endites, one on the pro-coxale. 

 one on the coxale and one on the basale, all three of which are 

 armetl with bristles. The marginal bristles of the e p i p o dial 

 p 1 a t e most frequently diminish rather regularly in length 

 the more dorsally and ventrally they are fixed. The e x o- 

 p o d i t e is four- or five-jointed, directed obliquely backwards 

 and outwards. Its two proximal joints are powerful and serve 

 as masticatory organs, most frequently rather well defined 

 both from each other, from the protopodite and from the third 

 exopodite joint; on the inner edge both are furnished with a 

 greater or less number of more or less powerful bristles, the proximal one has in addition a 

 more or less powerful tooth, consisting of several constituent teeth placed in a row. The 

 following exopodite joints generally differ very greatly in their structure from the two 

 preceding ones, they are very slightly chitinized and take no part in the mastication of the food. 

 The fourth joint is deeply sunk in joint no. 3, so that the latter is divided into an outer and 

 an inner lobe, the connection of which is often to be seen only in rather young specimens; the 

 inner lobe is sometimes more or less reduced. The endopodite not developed. 



With regard to the differences between the interpretation of the different parts of this 

 limb that have already appeared in the literature and the interpretation accepted in the present 

 woik see above p. 37. 



S i X t h limb: — Cf. fig. VII, p. 48. Without or with rather weak sexual dimor- 

 phism. — It is always rather large yet rather moderately lengthened in the longitudinal 

 direction of the body, directed ventrally. It consists of a rather well developed, more or less 

 ol)viously two- or three-jointed p r o t o p o d i t e and a rather powerful e x o p o d i t e; the 



Ki-. XXIV. 

 Ilie iiiaxilln 

 thosub-ociiii 



Iliil'i/.crlital sectiirii III' 



r a IVinii l)p!ono;ing' In 

 (''(;;'/( /o. (I iagramni a tic. 



endopodite seems always to be lacking. Protopodite: Armed on the anterior 

 edge with three endites, of which at least the two distal ones are well developed; one of these 

 is placed on the basale, the two others on the pioeoxale-coxale. The endites are furnished with 

 a varying number of bristles, most frequently rather powerful, some of which are placed 

 distaUy, some medially, generally somewhat more proximallv (measuring from the top of the 



