496 Dr. H. A. Baylis on 
Dr. Sambon has most kindly lent me, and allowed me to 
reproduce, the accompanying figure (fig. 1) of W. mitchell, 
- which has not hitherto been published. 
Fig. 1. 
Wellcomia mitchell. 
(Drawing kindly lent by Dr. LL. W. Sambon.) 
Female, lateral view. 
The following table shows certain measurements (in 
millimetres) of the females of the three species referred to, 
the figures for W. evoluta being those given by Hall (1916):— 
mitchell. evoluta. samboni. 
Motaldlengthey cs csnts. eoeebee = 12-15 9-18 8:9-13°5 
Maximum thickness ........ wee Over 1:0 0:67-1:0 
Diameter of head’ “s. 6. ce» 6 af O-1-0°19 0:08-0:1 
Hemet hol tam iia as ete ened pore 3-4. 1:72-2:58 1:9-4:0 
Distance from ant. end to: 
(1) posterior end of cesopha- 
gus (excluding bulb).. ah 0°895-1:065 0°75-0°82 
(2) mierve=rime it ce shcr ernie aa 0:095-0'155 0:13 
(3) base of vaginal outgrowth. 2-3°5 4-5 11-2:] 
Maximum diam. of cesophagus. oe 0:17-0:185  0-17-0:19 
(Hsophageal bulb, length .. SE 0 225-0:275 0:2 
1 ,, thickness... Ae 0°29-0-345 0-25 
Vaginal outgrowth, length 2-3 Up to 1:9 1922-9 
" ay max. thick- 
Ne@SS;, 6 «' re 0:225 0:17-0:44 
| 0:060-0°065 0:055-0-065 0:065-0-075 
Ova, measurements ........ x x x 
3 }0:028-0:032 0-025 0:03 
Number of turns of | spiral 
im ablkinesOR ball eee een [17 in figure} 18-24 14-20 
* The measurement here given is the distance from the anus to the 
tip of the tail. 
