252 Veterinary Medicine. 



not be distinguished from those of bots, it is well that the same 

 agents (benzine, bisulphide of carbon, carbolic acid) are appro- 

 priate in both cases. 



Strongylus Axei. This was found once in tumors of the 

 gastric mucosa of an ass at the Royal Veterinary College, 

 lyondon. It is a filiform worm with nude mouth and enlarging 

 gradually, posteriorly. The male is 2j^ lines in length and the 

 female 3 lines. There were three unequal spicula. No patho- 

 genesis was noticed. 



Strongylus Tenuissimus. This worm was found by Maz- 

 zanti in the gastric mucosa of an old horse. The mouth is nude, 

 with four papillae behind it. The body increases from the head 

 back. Male about i line in length, the female i^ line. Bilobed 

 caudal membrane ; 2 spicula. Vulva toward the posterior sixth 

 of the body. Ova, eggshaped. No pathogenesis observed. 



CEstridae. The larvse of the different forms of oestrus hiber- 

 nating in the horse's stomach are among the most important para- 

 sites of the animal. They are treated elsewhere in connection 

 with Diptera attacking the skin. 



ROUND WORMS OF THE ABOMASUM. STRONGY- 



IvOSIS. 



Gastric strongylus of cattle very injurious. Characters : Strongylus Con- 

 tortus : White or red, intestines shine through skin, two recurved papillae on 

 front part of body, tail pointed, length 5 to 13 lines ; ovoviviparous ; ova 

 elliptical. Hosts : Sheep, goat, argali, chamois, ox ; Europe and America ; 

 blood-sucker ; oviducts give twisted aspect ; have several moul tings in impure 

 water out of the body ; cause plague in lambs and yearlings, less in aged. 

 Worms attached to mucosa by mouth ; contents of stomach often bloody, 

 tissues anaemic. Symptoms of pernicious anaemia, emaciation, flat wool, 

 paper skin, dulness, inappetence, thirst, tympanies, black diarrhoea, embryos 

 in fseces, in damp, infested pastures, in spring and summer, with lung 

 worms. Prevention : Avoid infested pastures and streams, especially for 

 young, infested new sheep, old, overstocked sheep pastures, dewy morning 

 pastures, after rains ; salt in water ; rotation of crops. Treatment : Vola- 

 tile oils ; arsenious acid. Str. Filicollis : Narrow-necked strongyle ; mouth 

 small, circular, nude, alse laterally on head, gullet club-shaped, 4 to 9 lines ; 

 ova elliptical. Hosts : Sheep, goat in duodenum or stomach, head sunk in 

 mucosa. Equally injurious as contortus. Str. Ostertagi : Brownish yel- 

 low, narrow towards ends, mouth nude, gullet club-shaped, membraneous 



