IOC 



Dr. IT. A. Bay lis on 



Dr. SiimUoii has most kindly lont ino, uml allowed mo to 

 reproduce, the accompanyiii^i; fi<,Miro (tig. 1) ol IT. miichelli, 

 which has not hitherto been publi?>hed. 



Fig. 1. 



P StTO^ _ 



Wellcomia mitchelli. Female, lateral view. 

 (Drawing kiiuUy lent by Dr. L. W. Sainbon.) 



The following table show.s certain measurements (in 

 millimetres) of the females of the three species referred to, 

 the figures for TF. ew^t</a being those given by Hall (191G): — 



mitchelli. evoluta. 



Total lenc>th 12-15 9-18 



Maximum thickness .... Over 1-0 



Diameter of head O-l-OlO 



Lenjrth of tail * 3-4 1 7i>-2-58 



Distance from ant. end to : 



(1) posterior end of cesopha- 



pus (excluding bulb) 0-895-1 -065 



(2) nerve-ring _ 0095-0-15o 



(3) base of vaginal outgrowth. 2—3 5 A-o 

 Maxinmm diam. of oesophagus. .... 0'17-0'I85 

 (Esophageal bulb, length l'l^■5-0•_'75 



„ thickness 0-29-0;i4o 



Vaginal outgi-owth, length . . 2-3 Up to 1-9 

 „ „ max. thick- 

 ness. ... .... 0-:22o 



I 00G0-00G5 0055-0 0G5 



Ova, measurements { X X 



( 0028-0-032 0-025 

 Number of turns of spiral 



marking on tail [17 in figure] 18-24 



samho)ii. 

 8-9- 1.3-5 

 0-67-10 

 0-08-0-1 

 1-9-4-0 



0-75-0-82 



0-1 ;i 



M-21 



0-17-019 



0-2 



0-25 



1-2-2-9 



0-17 0-44 



0-OU5-0-075 



X 



003 



14-20 



* The measurement here given is tin. 

 lip of the tail. 



distance from the anus to the 



