NEMATODE PARASITES OF THE BRAZILIAN LAND-TOR- 

 TOISE, TESTUDO DENTICULATA. 



RESULTS OF THE MULFORD BIOLOGICAL EXPLORATION.— 

 HELMINTHOLOGY. 



By Edward A. Chapin, 

 Of the United States Department of Agrimlture. 



Among the numerous vertebrates brought to this countiy by the 

 Mulford Expedition to northern South America were two specimens 

 of the large land tortoise, Testudo denticulata. These animals died 

 shortly after their introduction into the National Zoological Park 

 iind through the kindness of the United States National Museum 

 authorities, the author was permitted to examine the viscera for 

 parasitic worms. Four species of nematodes were found, three of 

 which appear to be new to science. Two of the species fall into the 

 Strongyloidea, one of them representing a new genus; of the re- 

 maining two, one belongs in the Ascaroidea and the other in the 

 Oxyuroidea. 



Superfamily STRONGYLOIDEA. 



Family STRONGYLIDAE. 



SAURICOLA, new genus. 



Generic c^za^cs/^.— Strongylidae ; Strongjdinae, adults about 10 

 mm, long, head about 140{ji, in diameter. Buccal capsule small, shal- 

 low. Capsule surrounded by two leaf -crowns. Cuticle surround- 

 ing mouth forming a short mouth collar, limited behind by an 

 annular constriction. Six circumoral papillae. Lateral papillae 

 stout, apparently with terminal organ, Submedian dorsal and ven- 

 tral papillae more slender, projecting beyond surface of cuticle, 

 sharply angulate before apex in lateral view. Excretory pore 

 behind the esophagus. Cervical groove and papillae absent. Nerve 

 ring at posterior third of esophagus. Esophagus cylindrical, about 

 twice as long as thick. Bursa of male short, dorsal, and lateral por- 

 tions of membrane not separated, preanal bulla present, enclosing 



No. 2526— Proceedings U. S. National Museum. Vol. 65, Art. 13. 



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