86 



ii n-m B I& ^j ^ n ./^ tjt ut m m m % 



as in tlic males of the low tyiic (comi)are Fiij. 7 with l*"i(^. 5); the females 

 look 111 ire Ljcatle than the males, because the anterior side rnari,'in of the caput 

 is round, instead of anijular as in the case of the latter. 



Concerning the body lenL,ftli, for the measurement of which 809 females 

 were cmploN'cd, the specimens are classified into 15 ijroups (Table 4}, using 

 the same units as in the forcLToin'^ cases. 



Table 4. 



31 32 33 34 3; 

 86 12 r 175 124 94 



Excepting.;' the mi.ximum and minimum lenijth, in which the present species 

 surpasses the last one, the variation resembles in every respect that in the 

 females of Cladogiiatlais. The highest and the lowest individuals are inferior 

 in b(id)- !enL,fth t<i the males. So far as the boby length is concerned, the 

 variation passes not abiiqjlly from caie class to the next one, but fluctuates 

 continuiiusl)', .Accordingly its range is not so wide as in the males, and the 

 classes are limited to 1 5, \v'hile the males arc grouped into 23. The number 

 of individuals in the respecti\'e classes increases at first slowly, then very sud- 

 denly towards the long types i.e. the 33:1101 class; finalh" it decreases likewise 

 sutldenly, until at the end it is gradual again. 



The statements gi\'en on the females of Cladognathus are, therefore, also 

 valid in this case. There are, liowe\er, two points by which the two species 

 diverge from each other. First, the females of Lucamis comprise 1 5 classes, 

 while those of Cladognathus are divided into only 12 classes. The second 

 point of divergence, which is very important, consists in the fact that the 

 individuals of Lncaims are added \-erv' abruptly to its maximum and decrease 

 likewise abruptlj', so that the multiplication attains directly the highest point ; 

 whereas in the case of CfadoguatJins both the increased and the decreased 

 number in some classes near the maximum is only slightly diminished. These 

 divergencies are shown more clearly in the curve which follows (Fig. 8). 



