68 



Limjiworiii Disease. 



3. Strongylus micrurus ^Mi-hlis. Long slender worm with pointed 

 ends, smooth head and mouth. Male 3.5-4 em. long with small simple 

 bursa which is supported by five ribs and which is supplied witli 

 powerful spiculi; female 6-8 cm. long, posterior end strongly pointed, 

 genital pore directly ])ehind the mid-portion of the body. Ova (Pig. 6) 

 are oval with delicate sliell, containing an embryo in the mother animal. 

 The head end of the embryo is thicker, the i)Osterior portion of the body 

 is S shaped. 



The parasite occurs in cattle, fallow-deer, stags, exceptionally also 

 in horses and asses. 



4. Strongylus paradoxus Mehlis (Str. longevaginatus). Com- 

 paratively short whitish or brown worm with conical head and a mouth- 

 opening surrounded by six small papillae. Male 1.2-2.5 em. long, 

 bursae composed of two wings which are supported l)y five ribs, spicula 

 fine and long. Female 2.5-4 cm. ; its pointed body end is curved, 

 genital pore in front of the anus. It deposits ova and also live embryos. 

 Ova (Fig. 7) short oval \^^th a thick shell. The posterior end of the 

 curved embryo is thickened in a globular manner. Occurs in domestic 

 and wild pigs, exceptionally in sheep, roes and deer. 



Urollg\ lu^ )i; 



5. Strongylus Arnfieldii Cobbold. White filiform worm; male 

 2.8-3.6 cm. long; female 4.3-5.5 cm. long. Ova elliptical, em])ryo with 

 a fine caudal appendix. Occurs in horses and asses. 



6. Strongylus capillaris Schlegel (Nematoideum ovis pulmonale, 

 Pseudalius ovis pulm. Koch). A worm as thin as the threads of a 

 spider web, cylindrical, brownish (hence called lung hair-worm) ; the 

 body terminates behind in a point and is twisted like a corkscrew 

 in the male. Mouth opening surrounded l)y four pai)illa'. ]\Iale 1.4 

 cm. long. The ventral branch of its spicula is divided dichotomously 

 and serrated; bursa, however, very small. Female 1-2.3 cm. long. 

 Oviparous. (Railliet and Neumann believe this worm to be an un- 

 developed form of Strong, commutatus (rufescens) ; Schlegel has shown 

 that it belongs to the Strongy]ida\ The mature worm penetrates into 

 the pulmonary tissue after having deposited its ova ; it becomes encysted 

 there and it finally dies. The worm has been found in sheep, goats, 

 roes and chamois. 



7. Strongylus sagittatus IMiiller in stags. 



8. Strongylus pusillus Midler in eats. 



9. Strongylus minutissimus IMegnin in sheep (very rare). 

 10. Strongylus pulmonalis Ercolani in calves. 



