Parasites of the Intestines of Rabbits. 331 



Sporozoa. Coccidium Oviforme grows in the intestine of 

 the rabbit, producing coccidian enteritis (see vol. II, p. 262). 



Infusoria. Davaine describes Hexamita Duodenalis in the 

 contents of the bowel, probably Lamblia Intestinalis (Neu- 

 mann). 



Cestodes. In the small intestine of the tame and wild rabbit 

 and hare, what was formerly described as the Comb-shaped 

 Taenia (Taenia Pectinata), has been divided by Riehm into 

 five species : — two with unilateral genital pore, T. Rhopalio- 

 cephala of the hare and rabbit respectively ; and three with 

 bilateral genital pores, Dipylidium Leuckarti of wild rabbits, 

 D. Pectinatum of hares, and D. Latissimum of wild rab- 

 bits. Neumann adds T. Wimerosa of wild rabbits. 



Acanthocephalus. An Echinorhynchus was found by Bell- 

 ingham in the rabbit. 



Nematodes. Oxyuris Ambigua. Passalurus A. is found 

 in caecum and colon of rabbit and hare. Body fusiform, of uni- 

 form thickness to near the tail when it suddenlj' narrows and 

 tapers to a fine point. Male 3 to 5 mm. long, female 8 to 11 mm. 



Strongylus Strigosus. Striped Strongle. This is charac- 

 terized by the appearance of longitudinal striae, caused by the 

 shining through of the digestive and other organs, and by the 

 rapidly narrowing and pointed tail. It has been found in the 

 csecum, colon, and stomach of rabbits, wild and tame. 



Strongylus Retortaeformis is retort-shaped and found in the 

 intestines of hare and rabbit. 



Trichocephalus Unguiculatus. Whipworm of the Rab- 

 bit. Like other whipworms this infests the caecum and to a less 

 extent the colon, and is found in tame and wild rabbits and hares. 

 Its length is 3 to 4 cm., and it is characterized by the tenuity of 

 the spicula covered by a smooth sheath. 



Intestinal Anguillula of the Rabbit. This small hair-like 

 worm .37 mm. long has been found in the duodenum, jejunum, 

 and anterior part of the ileum of rabbits. The oesophagus which 

 occupies the anterior fifth of the body is triangular in outline, and 

 gradually expands posteriorly. The ovary is double and the 

 vulva toward the posterior part of the body, is surrounded by 

 papillae. Eggs ovoid, 40 /x by 20 ^. 



