250 Veterinary Medicine. 



numbers in the gullet and crop as well as the small intestines of 

 ducks and geese, inducing active inflammation and death. The 

 only symptoms noticed were inordinate appetite, followed by dys- 

 phagia, dulness, drooping, ruffled feathers, and hurried breath- 

 ing (Zurn). 



Tropisurus of the Duck. T. Inflatus, and T. Fisissipinus. 

 These are named because of the keel-like curvature of the tail of 

 the male. They have been found in submucus cysts in the gullet 

 and proventriculus of the domestic duck and may cause fatal in- 

 flammation (Zurn). 



GASTRIC PARASITES IN THE HORSE. ROUND 



WORMS. 



Round Worms : Spiroptera Megastoma : Mouth large with four horny 

 papillse in pairs ; 2 to 6 lines, linear ova, viviparous. L,esions : Worm in 

 galleries in mucosa, left sac ; hazelnut to hen's egg, opening into stomach ; 

 Sometimes in oesophagus. S. Microstoma : Five lines to one inch ; smaller 

 mouth with two papillse, viviparous ; free in gastric contents, head in mu- 

 cous gland duct, ulcers. Symptoms : Indigestion. Treatment : Benzine, 

 phenol, carbon bisulphide. Strongylus Axel : Galleries in ass's stomach. 

 Strongylus Tenuissimus : In gastric mucosa of horse. Larvse of oestrus. 



Spiroptera. This genus is characterized by the fact that the 

 caudal extremity of the male is spiral and furnished with mem- 

 branous expansions or wings as clasping organs for the female. 

 They are found mainly in the stomach or gastric mucosa of verte- 

 brates. They are cylindroid, attenuated at both ends or merely in 

 front ; head nude or furnished with papillse ; mouth round with 

 or without a pharyngeal cavity ; oesophagus long, cylindroid ; in- 

 testine slightly sinuous. Male has two spicula of different sizes. 

 Female has tail straight, conical ; two ovaries ; genital orifice 

 above or below the termination of the oesophagus. Oviparous ; 

 rarely viviparous. 



Spiroptera Megastoma. Body white, cylindroid and equally 

 attenuated at both ends. Head narrower than the body and 

 separated from it by a constriction or neck, mouth large with 

 four horny papillse in pairs, the two vertical ones the larger. 

 Funnel-ishaped pharynx. Skin striated. Male 2 to 2j^ lines in 

 length. Female 5 to 6 lines in length and % line thick. Genital 



