8 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 67 



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1876. — Die menschlichen Parasiten und die von ihnen herriihi'enden Krank- 

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 Megnin, Jean-Pierre. 



1881. — Sur de petits helminthes enkystes qui peuvent etre facilement con- 

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 ser. 6, vol. 3, juin, pp. 332-333. 

 RuDOLPHi, Carl A. 



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Schrank, Franz von Paula. 



1788. — Verzeiclmiss der bisher hinlanglich bekannten Eingeweidewurmer, 

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 Seitrat, L. G. 



1916. — Contribution a Tetude des formes larvaires des nematodes para- 

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 Smith, Allen J. ; Fox, Herbert ; and White, C. Y. 



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 Stiles, C. W. ; and Hassall, A. 



1899. — Internal parasites of the fur seal. {In Jordan, David Starr, 

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1803. — Anleitung zur Naturgeschichte der Eingeweidewurmer. xvi-f432 

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EXPLANATION OF PLATE 



int. — intestine. 

 oes. — esophagus. 



f.— posterior extremity, 



V. — ventriculus. 



a. — anus. 



h. — base of esophagus. 

 c. — intestinal cecum. 

 gl. — glantls. 

 /(. — anterior extremity. 



Figs. 1-4. — Porrocaecuni amcricamim, new species (lateral views). 1, posterior 

 end; 2, anterior end; 3, outline drawing of entire worm; 4, esophageal 

 region. 



Figs. 5-8. — Porrocaecum encapsulatum, new species (lateral views). 5, poste- 

 rior end ; 6, esophageal region ; 7, anterior end ; 8, encysted worm with cyst 

 partially removed to show the worm. 



o 



