272 Proceedings of the Royal Society of Victoria. 



Nerve IX. has thicknesses 6 to 11 and 16, the latter, however, 

 occurring only in one out of the 125 cases. 85 ■ 6 per cent, of 

 all cases have thickness 8 to 10, the greater number of these 

 having thickness 9. 



Nerve VIII. Thicknesses 3 to 8 are present : 3 to 5 being- 

 most frequent, occurring in 88 per cent, of all cases — of these 

 39-2 per cent, have thickness 4. Thicknesses 6, 7, 8, occur in 

 6, 4, and 2 per cent, of cases respectively. 



Nerve VII. varies in thickness from 2 to 5. Thicknesses 2 

 and 5 are seldom met with — while thickness 3 occurs in 27' 2 

 per cent., and thickness 4 in 65-6 per cent, of all cases, these 

 two thicknesses having thus a total of 92-8 per cent. 



Nerve VI. Thicknesses 3 to 6 occur, 5 and 6, however, but 

 rarely — thickness 3 was found in 36 per cent., and thickness 4 

 in 59*2 per cent, of all cases — total for thicknesses 3 and 4 being 

 thus 95-2 per cent. 



Nerve V. varies from 1 to 5 in thickness: 91-2 per cent, of 

 the cases having thickness 3 or 4, while thicknesses 1 and 2 

 occur very seldom. 



Nerve IV We find here thicknesses 2 to 6 of which 2 and 6 

 are each only met with in -8 per cent, of cases. Thicknesses 3 

 and 4 are equally frequent, each occurring in 44 per cent, of all 

 cases, while in 10- 4 per cent, of cases we find thickness 5. 



Nerve III. has a considerably greater thickness than IV., the 

 smallest thickness seen here being 7, and that only in one 

 instance ( - 8 per cent.) 



On the other hand, the greatest thickness seen was 19, this 

 also occurring in only one instance (-8 per cent.). Of the inter- 

 mediate thicknesses, I observed from 9 to 15 only, of which 80-8 

 per cent, cases were distributed between thicknesses 11, 12 and 

 13; 12, the most frequent, being found in 40 per cent, of all cases. 



Nerve II. varies in thickness from 3 to 6. By far the greatest 

 number of instances 79*2 per cent., or about three-fourths, have 

 thickness 4, while thickness 5 occurs in 12 per cent, of cases; 

 thicknesses 3 and 6 are not often found in connection with 

 nerve II. 



In comparing Table A with the corresponding Table for Bufo 

 variabilis,* the following are the principal differences noticeable : — 



* Adolphi, loc. cit.. p. 321. 



