46 GUIDE TO THE STUDY 



from the dog. In these forms the anterior portion of the body 

 is excessively long and slender, suggesting a whiplash. Study 

 and make drawings of the peculiar lemon-shaped brown eggs 

 with pluglike clear sections at each pole. 



References 



Good general accounts of the structure and life history of Trichinella 

 spiralis and of trichinosis, the disease which it causes, are to be found in 

 present-day textbooks of zoology and of parasitology. Of the enormous 

 literature on the subject, the following modern researches are of special 

 interest and availability to American students: 

 Ransom, B. H., 1916. Effects of refrigeration upon larvae of Trichinella 



spiralis. Jour. Agr. Research, 5 (18): 819-854. 

 Ransom, B. H., and B. Schwartz, 1919. Effects of heat on trichina-. 



Jour. Agr. Research, 17 (5): 201-221. 

 Ransom, B. H., B. Schwartz, and H. B. Raffensperger, 1920. Effects 



of pork-curing processes on trichinae. U. S. Dept. Agr., Bull. 880, 



37 pp. 



