Onichoniycosis in Solipeds. Seedy Toe. 31 



two or three entangled hairs, and under the microscope those 

 show the presence of minute spores in clumps and chains, bear- 

 ing a resemblance to those of the achorion Schbnleini. The 

 spores have a specially refrangent appearance. They are insolu- 

 ble in acetic acid, ether, alcohol and oil of turpentine, and turn 

 slightly blue under tincture of iodine. The failure to demonstrate 

 mycelium or spore bearing filaments, is emphasized by Neumann 

 who dismisses the observations as of no value. It should be re- 

 corded, however, that the affection, when neglected, and even 

 when treated internally by all known antiseptic and derivative 

 agents, persisted for years, whereas it yielded readily to a local 

 application to the shaved surface of an ointment of sulphate of 

 protoxide of mercury. Two similar cases came under my notice 

 in Ithaca, in which both horses in a team suffered from an obsti- 

 nate skin eruption with small incrustations entangling a few 

 hairs each, diffuse irregular depilation, and considerable itching. 

 The .scabs and the extracted hair bulbs showed as in Megnin's 

 cases, abundance of refrangent spores. The disease resisted gen- 

 eral treatment but yielded to local applications. The owner of 

 the team contracted the affection from scratching his shins after 

 dressing the horses, and the veterinarian inoculated it on his eye- 

 brow. In both cases the eruption proved inveterate, breaking 

 out again and again, weeks after apparent recovery and when the 

 treatment had been intermitted. 



ONICHOMYCOSIS IN SOLIPEDS. SEEDY TOE. 



Achorion Keratophag^us in powdery degeneration of the horn tubes in 

 the inner layer of the hoof wall : the question of its pathogenesis. 



Ivike Onichoniycosis in man this has been found associated 

 with a cryptogam which has been named Achorion Keratophagus 

 (Ercolani). It is not improbably the achorion or trichophyton 

 of the skin transferred to the horn, in which it grows mostly 

 along the line of the horny tubes as filaments, and is associated 

 with thickening, loss of cohesion and pulverulent degeneration 

 of the horn. In solipeds the disorder shows as a soft powdery 

 mass between the hoof wall and sole, and extending upward on 

 the outer side of the keraphyllae. Ercolani found filaments. 



