405 



By this means the following results are obtained: 



Average length. Ayerage breadth. 



Below age of 10 years 2,8 cm 3,7 cm 



Between 10 and 30 years 7,0 „ 8,5 „ 



„ 30 „ 40 „ 6,4 „ 7,4 „ 



„ 40 „ 60 „ 6,8 „ 8,8 „ 



„ 60 „ 80 „ 6,8 „ 7,7 „ 



This table enaphasizes two points — first that the caecum is 

 much larger in the adult than in the child; and secondly it again 

 very forcibly illustrates the fact that the caecum is always broader 

 than long. 



The largest caecum I met with, was in a male aged 65, where 

 the caecum measured 10,2 cm in length by 11,5 cm in breadth. These 

 are of course, actual measurements, as given by the casts. 



Types of caeca. 

 I am quite in accordance with the descriptions of the four types 

 of caeca as given by Treves in his Hunterian Lectures of 1885, and 

 to which the reader is referred. The only point I wish to discuss 

 here is the relative frequency of each type and their bearings upon 

 the surgery of the appendix. 



According to Treves, the relative frequency of the four types is 

 somewhat as follows: 



Type one 2 <^/q 



Type two 3 „ 



Type three 90 „ 



Type four 5 „ 



In the above list both the cases under type one were from females 

 aged 50 and 70 years respectively. 



Of the five instances embraced under type four, one was from 

 a foetus at full term, the remainder were from adults. 



In my own series of cases, I met with the following percentages: 



It will be noticed that under type one I have 10 "/q as against 

 Treves' 2 ^/q. This, however, is easily accounted for by the fact that 

 6 of the 10 cases met with of type one in my series were from foetuses. 

 The remaining four were constituted as follows: 



