65 



Consequently the maximal length of tylostyles reaches in about 33°/ cases 550 u. and 

 more, but less than 600 ij. and in about 75°/ cases 500 y. and more, but less than 650 u. 

 Further we see that a length of less than 350 p. and more than y 00 ij. seldom occurs. Whensoever 

 the number of measurements we dispose of is but little, it is evident that gradual transitions 

 occur and that the limits are large. 



The diameter of the tylostyles likewise varies considerably. The maximal diameter varies 

 between 5 and 30 u, as the following table shows. 



If we put together sizes of 4 p. and more, but less than 6 p., of 6 [j. and more, but less 



than 8 u, etc. we find the following. 



1 



2 



3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 



4 

 etc. 



6 

 etc. 



8 

 etc. 



10 

 etc. 



12 



etc 



14 

 etc. 



16 

 etc. 



18 



etc. 



20 



etc. 



22 

 etc. 



24 

 etc. 



26 



etc. 



28 

 etc. 



30 



etc. 



Thus, in about 20°/ o cases the maximal diameter reaches ióp. and more, but less than 

 18 [j. and in about 85°/ cases 10 p. and more, but less then 22 p.. Less than 6 u. and more 

 than 24 u. seldom occurs. Again we find large limits, but all possible transitions. 



SIBOGA-EXPEDITIE Vla'. 



