NEMATODE PARASITES OF BIRDS 263 



of enormous tricuspid hooks. In addition the cuticula is provided 

 with 2 double rows of hooks, the points of which are directed 

 backward. Mouth with 2 lateral lips. Buccal cavity tubular. Vulva 

 directly anterior to middle of body. Uteri divergent. Two unequal 

 spicules. Four pairs of preanal papillae. 



Parasitic in the digestive tract of birds. 



Type species. — Seuratia shipleyi (Stossich, 1900) Skrjabin, 1916r/. 



KEY TO SPECIES OF SEUKATIA 



1. Female 13 to 14 mm. long; from Procellaria anglorum. 



Seuratia procellariae, p. 2G3. 

 Female 21.5 to 35 mm. long; from hosts other than above. 



Seuratia shipleyi, p. 263. 



SEURATIA PROCELLARIAE (Diesing, 1851) Cram, 1927 



Synonyms. — Spiroptera procellariae anglorum Diesing, L851 

 (based on Bellingham, 1844) ; Spiroptera procellariae Diesing, 1851; 

 Prionostemma procellariae (Diesing, 1851) Gendre, 19205. 



Hosts. — Primary : Procellaria anglorum, secondary : Unknown. 



Location. — Attached in crop. 



Morphology. — /Seuratia (p. 262) : Mouth orbicular, projecting, sur- 

 rounded by 4 papillae. Neck armed with recurved hooks and the 

 anterior third of the body also provided with 4 rows of smaller 

 spines. 



Male unknown. 



Female 13 to 14 mm. long. Body thickened posteriorly, very 

 translucent, the course of the intestine, which enlarges posteriorly, 

 visible through body wall. 



Life history. — Unknown : probably involves intermediate stages 

 in other hosts. 



Distribution. — Europe (Ireland ) . 



Seurat states that his new r species, Acuaria pet 'agica (=S. shipleyi), 

 is close to this species in the character of its epaulets, the cutaneous 

 spines of the esophageal region, the median position of the vulva. 

 and the elongation of the cuticular ovejectors. 



SEURATIA SHIPLEYI (Stossich, 1900) Skrjabin, 1916d 



Synonym. — Gnathostoma shipleyi Stossich, 1900; Rictularia para- 

 donna Linstow, 19035/ Rictularia shipleyi (Stossich, 1900) Johnston, 

 1912; Acuaria pelagica Seurat, 1910(2/ Prionostemma pelagicum 

 (Seurat, 1916) Gendre, 19206/ Prionostemma shipleyi (Stossich, 

 1900) Gendre, 19206. 



Hosts. — Primary: Diomedea exulans, Daption capensis, Larus 

 canus, Pufflnus kuhli; secondary: Unknown. 



Location. — Proventri cuius. 



