Statistical Studies on thk V'ariaiioN ok Staoisf.kti.ks. 



85 



place down to the 49mm class from which no more are added. The results 



show that the species in 

 question is more variable 

 than Cladognatlms and that 

 the maximum frequency is 

 attained at the 44mm class. 



The above data arc ex- 

 pressed dia<^ramatically in 

 Fig. 6. 



From its start to the 43mm 

 class, the curve describes a 

 zigzag line and then ascends 

 steepl)' to the 44mm class, 

 from which it descends near- 

 ly vertically, forming a very 

 acute angle with its two 



Fig. 6. Curve exhibitins; frequency of variates in body 

 length of Liicanus male; explanation as in previous 

 figures. 



limbs ; then at the end it follows a horizontal course (Fig. 6). The curve is, 

 however, unimodal. In this unimorphic curve the mode is at 44mm and the 

 mean at 41mm; the median magnitude, 39mrn, is, therefore, distant from the 

 mean. I dare to assume, nevertheless, that the Lticamis male is on the way 

 to dimorphism similar to that which is 

 ob\ious in the male of Cladognathiis. 



Female. — The female variates of 

 Lticamis are as simple as those of 

 Cladognatlms ; the individuals of the 

 low type can not be distinguished 

 from those of the high type except 

 by the much inferior body length in 

 the former, which is a little more than 

 half of the latter (Fig. 7). It is 

 remarkable that the caput is truncated 

 from both sides at its hind part, just 



P"ig. 7. Ltttimits inacu 'if\'niorntns, Motsch. female. 

 View representing higlie.'it a fjgmm), and lowest 

 b (25mm) individuals. (Natural size). 



