Proc. Roy . Socy. of Edin.~\ 
[Vol. XXV. 
Fig. 3. — Ankylostoma duodenale (human). Conjugation of male and 
female worms, x 7 diameters. 
Fig. 5. — Larva of Ankylostoma Qaninum. Young larva, 72 hours after 
inoculation on agar at 20° C. x 300 diameters. 
Prof. Thomas Oliver. 
