292 DE. T. S. COBBOLD OK STRONGTLTJS TETEACANTHUS. 



MoLiN. — {Cyathostomum tetracantJium) II sottard. degli Acrofalli, 



1860, pp. 453-455, tav. xxv. figs. 5, 6. 

 Colin. — Mem. surle developp. et les migrations des Sclerostoma, 1864 



(quoted by Leuckart). 

 Varnell. — (Entozoa in various stages of growth.) The Veterinarian 



for 1864, pp. 202 and 265. 

 Littler. — (Extremely small Ascarides.) Quoted by Varnell, as above, 



1864. 

 Schneider. — Monog. d. Nemat., p. 134, tab. viii. figs. 7) 8 (1866). 

 Krabbe. — Husdyrenes Involdsorme, p. 17; Aftryk af Tidsskr. for 



Veterin., 1872. 

 CoBBOLD. — Observations on rare Parasites in the Horse. The Veteri- 

 narian, March 1875. 

 . Further remarks on rare Parasites from the Horse. Ibid. May 



1874. 

 . Fatal epidemics afi'ecting Ponies. Ibid. June 1874 ; also in 



' The Field ' for April 25, 1874. 

 . Epizooty in the Horse, more especially in relation to the ravages 



produced by the four-spined Strongyle. The Veterinarian, April 



1875. 

 . Parasites of the Horse. (Note on specimens of /S. ^eifracawfAws.) 



Ibid. March 1876. 

 . ' Parasites ' (of Solidungula). London, 1879, p. 374 et seq. 



(with figs.). 

 Leuckart. — Die menschl. Par., Bd. ii. 1876, p. 445 (with fig.). 

 SoNSiNO. — On the Entozoa of the Horse in relation to the late Egyp- 

 tian ec[uine plague. The Veterinarian, March 1877- 

 Linstow, O. von. — Compend. d. Helm., p. 56-7 (1878). 



DESCEIPTION OF PLATE XXXVI. 



Fig. 1. Head and neck of Strongylus Arnfieldi. Male. X 65 diam. 



2. Tail and lower part of the body. Female. X 65 diam. 



3. Front view of the same. 



4. Tail and lower part of the body. Male. X 65 diam. 



5. Tail of the same, seen from behind. X ISO diam. 



6. Plan of the expanded hood and rays, seen from behind. 



7. Egg of Strongylus Arnfieldi with contained embryo. X 200 diam. 



8. Head and neck of the embryo. X 400 diam. 



9. Tail of the same, X 400 diam., with {x) appendage separately drawn, 



X 1000 diam. 

 10. Head and neck of Strongylvs tetracantJms. Mature male. Highly 



11. Tail of the same species. Female. Highly magnified. 



12. Portion of the intestine of a colt, showing cysts beneath the mucous 



membrane, each containing a worm. Slightly enlarged. 



13. One of the cysts containing a larva of Strongylus tetracantJms in the 



Trichonema-stage. X 30 diam. 



14. Gtroup of cocoons or faecal pellets containing immature worms. Natui-al 



size. 



