and fox hookworm, Uncinaria stenocephala, from the stomach of a 
pig in Canada, and notes that there are specimens of Bunostomum 
Fis 23. Stephamirus dentatus. Egg, containing embryo. Enlarged. 
B From Taylor, 1900. 
trigonocephalum, the sheep hookworm, labeled as collected from the 
pig, in the collections of the Federal Bureau of Animal Industry. 
A new species of hookworm from swine in the Island of Trinidad 
Fig. 24. Gnathostoma hispidum. Egg. x 700. From Ciurea, 1911. 
has just been described by Ackert and Payne under the name of 
Necator suillus. The eggs are 56 to 66 microns long by 35 to 40 
microns wide. 
The eggs of the nodular worm of swine, CEsophagostomum 
dentatum, are similar in shape to those of the hookworms and are 
60 to 80 microns long by 35 to 45 microns wide. Another nodular 
worm, Bourgelatia diducta, has been described from swine in Annam. 
The eggs are ellipsoidal, 69 to 77 microns long by 38 to 43 microns 
wide, and in the morula stage when deposited. 
30 
