BIHANG TILL K. SV. VET.-AKAL». HA^DL. BAND 27. AFD. IV. N:0 1. 9 



total length ("•/« %). These dijfferences, no cloubt, either are 

 too small for giving specific characters, or, as we see for "/« "o, 

 the fignres overlap each other; and with the lar val specimens 

 taken into accoiint, the differences between the two groups 

 are farther evanescent, because then v^e see: 



I < 52 8 



"/a % hl the reticulatus-grou]^ \ '^ 



I < 43.9 



( > 38.1 



» Vahlii-gvoui^ 



reticulatus-grovLY» 



I < 49.9 



la 



» Fa/iZw-group . . 



» reticulatris-grou]) 



» Vahlii-gvonii . . 



» r€ticulatiis-gvo\i\i 



» Fa/i/n- gr oup 



I > 41.7 

 I < 42.7 

 ] > 36.7 

 J < 56.7 

 1 > 48.9 

 I < 62.8 

 \ > 55.7 

 j < 53.9 

 I > 45.1 

 f < 59.7 

 • \ > 53.9. 



The auxological law (ontogenetic as well as phylogenetic) 

 for the development is expressed by a steady progress in the 

 fignres for the relative length of the fore-body and a decrease 

 in those for the length of the tail, as may be seen from the 

 following table: 



Here, indeed, in the last two lines ("/d % and "'/», %) a 

 truly constant character divides the two groups, as far as can 

 be judged from our specimens; and the limit between their 

 respective variablenesses seems to be fixed at 78 %, so that 

 "/» ?^ f < 78 characterizes the forms of the Vahlii-gTow]), 

 "'/i', /0 1 > 78 » 5> » » » reticulatus-growp. 



