154 Nematodirus filicollis Rud. 
Ransom, B. H. (1906). The Life History of the Twisted Wireworm [Haemonchus 
contortus ) of Sheep and other Ruminants. U. S. Dept. Agr., Bur. Animal Ind., 
Circ. 93. 
-(1907). Notes on Parasitic Nematodes, including Descriptions of new Genera 
and Species and Observations on Life Histories. U. S. Dept. Agr., Bur. Animal 
Ind., Circ. 116. 
--- (1911). The Nematodes Parasitic in the Alimentary Tract of Cattle, Sheep 
and other Ruminants. TJ. S. Dept. Agr., Bur. Animal Ind., Bull. 127. 
Rudolphi, K. A. (1802). Fortsetzung der Beobachtungen iiber die Eingeweide- 
wiirmer. Arch. f. Zool. u. Zoot., Braunschweig, n, pp. 1-67. 
- (1803). Neue Beobachtungen iiber die Eingeweidewiirmer. Ibid., m, 
pp. 1-32. 
Schneider, A. (1866). Monographic der Nematoden. Berlin, p. 145. 
Seurat, L.-G. (1913). Le Gundi, nouvel hote du Nematodirus filicollis (Rud.). 
C. R. Soc. Biol., Paris, lxxiv. 
Stephens, J. W. (1909). A new human Nematode, Strongylus gibsoni, n. sp. Ann. 
Trop. Med. and Parasitol., n, p. 315. 
Stodter, W. (1901). Die Strongyliden in dem Labmagen der gezahmten Wieder- 
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EXPLANATION OF PLATES. 
PLATE VIII. 
Nematodirus filicollis Rudolphi. 
Adult female, x 20. 
Posterior end of body of female, viewed from right side, x 450. 
Anterior end of body of female, viewed from left side, x 200. 
Posterior end of body of male, viewed from right side, to show bursa and spicules, 
x 170. 
Posterior end of united spicules of male, ventral view, x 950. 
Egg, taken from fresh faeces of lamb, x 400. 
PLATE IX. 
Nematodirus filicollis Rudolphi. 
Fig. 1. Newly-hatched larva. x350. 
Fig. 2. Larva after completion of second ecdysis, x 350. 
Fig. 3. Young stage (3-3 mm. long) from intestine of lamb, x 60. 
Fig. 4. Posterior end of same specimen, showing the rudimentary bursa enclosed by 
the larval skin, x 400. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
