116 THE INTERNAL PARASITES OP 



arising from bots. The development of these parasites, 

 however, I do not here propose to describe, as they do 

 not properly belong to the helminths or intestinal worms. 

 Most interesting cases of this kind, several of them 

 proving fatal, are recorded in the Veterinarian by Messrs. 

 Brewer, Cartwright, Goodworth, Mather, and Woods. 



As to the literature of the palisade strongle, that is 

 well nigh inexhaustible. In this country papers have 

 been contributed on the latter subject by Harlan, Mercer, 

 Seaman, and others ; whilst abroad, the writings of 

 Gurlt, Eayer, and Leuckart have chiefly helped to fashion 

 our knowledge of the structure and development of the 

 entozoon. On this subject I cannot give further details, 

 but I may mention that the most complete memoir I have 

 yet seen is that by Dr. Bollinger ("Die Kolih der Pferde, 

 und das Wurmaneurysma der Eingeweidearterien •/' 

 Munchen, 1870). 



The literature of " worm in the eye " is equally 

 co-extensive with the foregoing, as may be gathered 

 from the memoirs of Clarkson, Hopkinson, Jeffreson, 

 Hickman, Kennedy, Macnamara, Molyneux, Percival, 

 Skeavington, Twining, and many others. 



For a good example of the parasite I am indebted to 

 the Kev. Horace Waller, the well-known Zambesi 

 traveller; the specimen, a male, having been forwarded 

 from Assam. 



Lastly, I have only to add that there are many other 

 curious examples of equine parasitism on record, the 

 precise nature of which — from the total absence of any 

 knowledge of the merest rudiments of helminthology on 

 the part of the various writers — must necessarily remain 

 involved in obscurity. 



