264 
The Ascaridae 
Drasche, R. von (1884). Revision der...Original-Exemplare Diesing’s und Molin’s. Verh. 
d. K. K. zool.-bot. Ges. Wien, xxxiii. 107. 
Dujardin, F. (1845). Histone naturelle des Helminthes. Paris. 
Gedoelst, L. (1916). Notes sur la Faune Parasitaire du Congo beige. Rev. Zool. Afric. 
(Brussels), v. 1. 
Hall, M. C. (1916). Nematode Parasites of Mammals of the orders Rodentia, etc. Proc. 
U.S. Nat. Mus. (Washington), l. 1. 
Magath, T. B. (1919). Camallanus americanus, nov. spee., a Monograph on a Nematode 
Species. Trans. Amer. Microsc. Soc. xxxvm. 47. 
Railliet, A. and Henry, A. (1912). Quelques Nematodes parasites des Reptiles. Bull. 
Soc. Path. exot. (Paris), v. 251. 
- (1915). Sur les Nematodes du genre Goezia Zeder. Ibid. viii. 270. 
Stiles, C. W. and Hassall, A. (1899). Internal Parasites of the Fur Seal. In The Fur 
Seals and Fur Seal Islands of the North Pacific Ocean. Report on Fur Seal Investigations 
(Washington). Part III, 99. 
Stossich, M. (1896). II Genere Ascaris Linne. Boll. Soc. Adriat. Sci. Nat. (Trieste), xvii. 9. 
Ward, H. B. and Magath, T. B. (1916). Notes on some Nematodes from Fresh-water 
Fishes. Journ. Parasitol. in. 57. 
Wigdor, M. (1918). Two new Nematodes common in some Fishes of Cayuga Lake. Ibid. 
v. 29. 
A series of diagrams illustrating certain types of structure met with in the alimentary canal 
of Ascaridae. The shaded portion represents the hinder part of the oesophagus. 
A, oesophageal ajjpendix; B, oesophageal bulb; C, intestinal caecum; V, ventriculus. 
1, Anisakis; 2, Porrocaecum; 3, Contracaecum; 4, Dujardinia (4a, D. hdicina; 46, D. hali- 
choris ); 5, Anyusticaecum; 6, Amplicaecum. 
No specimens of Raphidascaris having been available, the structure found in this genus has 
not been figured. It is presumably like (3), but without the intestinal caecum. 
