NEMATODOS DE LOS REPTILES DE MEXICO. III.

Resumen

The present paper is our third contribution to the study of the parasitic Nematodes of the mexican Reptiles. We have found new hosts for some parasites previously studied and we describe two new species: Ophidascaris ochoterenai and Camallanus magnorugosus.
Ophidascaris ochoterenai n . sp is similar to O. oboconica (Baird, 1860) in the length of the oesophagus and in the size of the spicules, but differs from this species mainly in the number of pre-anal and post-anal papillae. It is different from the other American species in the number of papillae and in the size of the spicules. lts differences with O. filaria and O. excavata are mainly in total length, in the length of the spicules and other organs; with O. natricis in the number of preanal papillae and in the length of the spicules, and with O. baylisi in the number of preanal and postanal papillae and in the size of the spicules.
Camallanus magnorugosus n. sp. differs from other species, parasitic on turtles, in the number of caudal papillae, in the number of inner ridges of each buccal capsule (18 ridges), in the size of the spicules and in the terminal from of the branches of the "tridents".