Dr, L. Orlej on Nematodes. 31 i 



II. Genus EuSTRONGYLUS, Dies. 



Mouth without lips ; mouth-opening- circular, surrounded 

 by papillffi. Bursa cup-shaped. One spiculum at the tail-end 

 of the male. 



Eustrongylus gigcis is the only representative of the genus 

 in this collection. Male and female examples occur from Sus 

 scrofa (domestic). 



III. Genus Physaloptera, Rud. 



Mouth surrounded by two semicircular lips ; two spicula, 

 differing in form ; a dilated heart-shaped bursa investing the 

 caudal termination. One unpaired papilla in front of, and ten 

 pairs of constant papillai behind, the anus. 



No. Species. Species of host. 



1. saginata, Rud. Tityra leucouotus. 



2. alata, Rud. Falco tinnunculus. 



3. megalomastoma, Rud. ,, nisus. 



4. sp. ? Sieb. Emys venusta. 



5. obtusissima, Molin. Oxyrrhopus phimbeus. 



6. retusa. Rud. From a large Tropidolepidura . 



IV. Genus Heterakis, Duj. 



Mouth trilabiate ; lips sometimes so small as to be incon- 

 spicuous ; two dissimilar spicula ; male with sucker in front 

 of anus ; three constant pr^eanal papillje and several postanal 

 ones. 



No. Species. Species of host. 



1. maculosa, Rud. Columba doraestica. 



2. inflexa*, Rud. Tetrao urogallus. 



,, „ Gallus gallinaceus. 



3. vesicularis, Rud. Pavo cristatus. 



4. faveolata, Rud. Platessa flesus. 



V. Genus Filaria, Miiller. 



Filaria, End. 



Spiropicra, Knd. (in part). 



Lyorhynclnis, Kiid. 



Mouth-parts showing the greatest variety in form ; two 

 dissimilar spicula; four pra^anal papillae. 



I here describe two new species, and point out one young 

 form. 



* Ascuris mjl<'xa, Rud. 



22* 



