ASCABIS MYSTAX. 321 



would thus free herself from "both disease and sin." I have 

 mentioned this, not with the view of now discussing the true and 

 false instances where insect larvse have been obtained from the 

 human body, but for the purpose of directing attention to the 

 possible or probable sources whence the larvas of Ascaris mystax 

 may have been derived, and, in the sequel, I think its importance 

 will be made manifest. 



The foregoing communications by Drs. BeUingham and PickeUs 

 are, fortunately, accompanied by a few drawings, exact outline 

 copies of which I have here reproduced in order that they may be 

 compared with my original figures, subsequently given. Some time 



Wia. 68. — 1. Outline of an " Ascaris ejected by Tomiting ;'' natural size. This was probably a 

 female. 2. Head of the same, magnified, showing the trilobate mouth and alee. 3. Lateral 

 view of the tail of the same, magnified, showing the anal cleft. — PickeUs. 



ago, when engaged in preparing the paper " On Human Bntozoa," 

 which was read at the last meeting of the British Association at 

 Cambridge, I took occasion to work out thi^ vexed question as to 

 the genuineness of BeUingham' s Ascaris alata ; and I must say 

 that whatever doubts I had previously entertained regarding his 

 two nematodes, they were at once dissipated on viewing the figures 

 given by Dr. PickeUs in the work above cited (Yol. iv., Plate III., 

 Figs. 6, 7, 8). 



Having thus, by an examination of these figures and writings, 



T T 



