318 Dr. L. Orley on Nematodes. 



XVII. Genus Tkichosoma, Eud. 

 One spiculum ; vagina protrusible. 



No. Species. Species of host. 



1. contorta, Creplin. Corviis frugilegus. 



2. reseeta, Dnj. ^^ ^, 



3. brevicollis, Rud. Anser cinereus. 



XVIII. Genus Trichodes, Linstow. 

 Tricliodes, Linstow, Troschel's Arcliiv, 1874, i. 



No spicula ; no bursa. Male in the oviducts of female 

 during copulation. 



Tricliodes crassicmida^ -^^l^'-j is the only representative of 

 the genus in this collection, from Mus decunianus. 



XIX. Genus Teichocephalus, Goeze. 



Body hair-like at anterior and thick at posterior end. The 

 caudal end of male screw-shaped. 



No. Species. Species of host. 



1. dispar, liud. Homo sapiens. 



2. unguiculatus, Rud. Lepus timidus. 



XX. Genus Pseudalius, Duj. 



Two similar spicula. Bursa bilobate^ spoon-shaped, or 

 wanting. Papillas numerous. 



No. Species. Species of host. 



1. inflesns, Rud. Phocaena communis. 



2. convolutus, Dies. „ ,, 



„ ,, Globiocephakis svineval. 



3. minor, Dies. Phocsena communis. 



Khabditiform^. 



Rhahdonema nigrovenosa, Leuck. [ = Ascaris nigrovenosa^ 

 Eud.), sin& Rhahditis elongata {=Le])todera elongata., Baird) 

 are the only representatives of the suborder in this collection ; 

 the former occurs from Rana temj)oraria, the latter from 

 Siredon mexicanus. 



EXPLANATION OF PLATE X. 



Fig. \. Filaria ecaudata, niihi : a, head of male, mag. 70 diam. ; h, tail of 



male, mag. 70 diam. ; c, head of female, mag. 70 diam. ; d, tail 



of female, mag. 70 diam. 

 Fig. 2. Filaria spiralis, n. sp. : a, head of female, mag. 70 diam. ; h, tail 



of I'omale, mag. 70 diam. 

 Fig. 3. Filaria ? (young stage) : a. tail, enlarged ; b, part of the body, 



showing the ramifications of the lateral vessels, mag. 70 diam. 



