OKLAHOMA ACADEMY OF SCIENCE 75 



the stomach filled with straw and small stones and the large numbe'- 

 of cestodes in the small intestine. The intermediate stage of this 

 tapeworm is also in the rabbit, usually tlie jack rabbit (Lepus texl- 

 anus). The larval stage, Coenurus serialis, is usually found in 

 fhe connective tissues, muscles and subcutaneous tissues, of the rab- 

 bit, often forming prominent tumors beneath the skin. 



Other tapeworms undoubtedly occur in Oklahoma dogs but as 

 yet the writer has not met with any in the autopsies that he has 

 performed. However, some intermediate stages of other species 

 have been found. Cysticercus tenuicollis, the larval stage of Taenia 

 hydaiigena (rnarginata), has been found a number of times in the 

 livers and mesenteries of sheep. This larval form may also occur 

 in hogs and cattle. Taenia hydaiigena is one of the largest of the 

 dog tapeworms and may reach a length of 15 or more feet. 



Multiceps multiceps no doubt occurs in our dogs from time to 

 time but up to the present it has not been found here. Coenurus 

 cerchralis, the larval stage of this worm and the cause of gid in 

 sheep, is found occasionally in our sheep. 



Taenia ovis may occur in our dogs although we have no records 

 of it at the present time. Sheep are often imported from regions 

 of the west where this worm is prevalent. The larval stage, Cysti- 

 cercus ovis, occurs in the muscles of sheep in Colorado, Wyoming. 

 Montana and Idaho. Echinocoeeus granulosus (Taenia echinococ- 

 cits) occurs in our dogs occasionally. The larval stage, or hydatid, 

 occurs in man, cattle, sheep, horses or hogs, in such tissues as the 

 liver, kidney, muscles, brain, or lungs. A large number of cases of 

 hydatid disease in man have been recorded from the United States. 

 In recent years there has been a large increase of hydatid disease 

 among the domestic animals that have been slaughtered at the abat- 

 toirs. There has been an alarming increase in this state and the 

 prevalence of this disease in our domestic animals gives us an 

 idea to Avhat extent man is exposed. The fact that it is present in 

 sufficient proof for the suppression of the dog nuisance. 



The cats examined for parasites showed a very high percentage 

 (85%) of infestation with tapeworms. The common and only 

 species found in cats that were studied was Taciia taeniae formis 

 (crassicollis). The larval stage, Cysticercus fasciolaris, is ...o^. 

 monly found in rats, mice, and other rodents. Cats may also 

 harbour Dipylidium caninum and Taenia pisiformis as mentioned 

 above. 



Roundworms 



Roundworms infesting dogs and cats are primarily of two 

 species, hookworms and ascarids. Sixty-eight per cent of the dogs 



