92 FIXABIA GRACILIS. 



distinctly seen beneath the integument. Mouth, a simple 

 circular opening, no papilla being visible around it. -Esophagus, 

 stomach, and intestinal canal plainly descernible, continuous 

 throughout. 



The instances of this variety observed by Eudolphi, were 

 discovered within the peritoneal folds of a Capuchin Monkey, bat 

 their exact locality is not mentioned. He also discovered Filaria 

 in the Aard Wolf, an animal intermediate between the Hyaena 

 and Civet. In respect of those discovered in the Monkey, he 

 describes them as hermaphrodite, which does not accord with my 

 observation in this case. 



Having now determined the species and named the worms, we 

 may with propriety consider — 



First, — The form and manner in which the worm obtains 

 admission into the body ; and 



Secondly, — The most probable manner in which the worms 

 before us managed to reach the places within the folds of the 

 great omentum, which, hanging from the stomach, covers the 

 intestines, and by folding returns upon itself, consisting at this 

 part of four layers of serous membrane. 



Kow as to the first consideration. A worm may obtain admission 

 into the body, say the human body for example, either in the 

 form of an egg, or as the product of an egg ; or again, they may 

 enter per ora; or, as in the case of the Guinea worm, and 

 some others of the same class, they may perforate the 

 skin. Take for instance the case of a Lumbricus, although 

 it has been hotly disputed, yet there appears to be but 

 little doubt that this animal obtains admission into the system in 

 the form of an egg, which has passed away from the body of an 

 intestinal .worm situate at the time in the intestine of some 

 unfortunate individual; such an egg dried by exposure to the 

 atmosphere may be blown about by winds, and deposited upon a 

 vegetable, which, conveyed to the mouth of some unlucky wight, 

 the egg escaping the eifects of the teeth, passes direct to the 

 stomach, and thence to the intestine, where it developes into a 



