NEMATODE PARASITES OF BIRDS 



279 



Female 7.4 mm. long (Linstow) or 10 to 11 mm. long (Dujardin) 

 by 480/* wide. Vulva somewhat posterior to middle of body, the 

 ratio of part anterior to part posterior being as 4:3. Tail end 

 rounded, the tail length 1/41 of body length. Esophagus one-third 

 of body length. Eggs 30/4. by 19/* (Dujardin). 



Life history. — Unknown ; probably involves intermediate stages in 

 other hosts. 



Distribution. — Europe (Prussia (Hanover)). 



SYNHIMANTUS INVAGINATA (Linstow. 1901) Skrjabin, 1924 



Synonyms. — Dispharagus invaginatus Linstow, 1901; Acuaria 

 {Synh'nnantus) invaginata (Linstow, 1901) Railliet, Henry, and 

 Sisoff, 1912. 



Hosts. — Primary: Babulcus lucidus, Ardeola ibis, purple heron, 

 and a host unknown; secondary: Unknown. 



Location. — Esophagus and under tunic of gizzard. 



Fig. 345. — Synhimantus invaginata. a and b, Head end; c, male tail; d, 



RIGHT AND C, LEFT SPICULE; f, FEMALE TAIL. AFTER GDNDRE, 1913 



Morphology. — Synhimantus (p. 272) : Mouth with 2 triangular. 

 conical, lateral lips, each bearing 2 very small symmetrical papillae 

 on the outer surface. Body transversely striated, the striations 5/* 

 apart anteriorly and 10 to 14/* apart posteriorly. Cordons (tig. 345# 

 and b) recurrent and anastomosing. 



Male 10.45 to 11.1 mm. long by 270 to 290/* wide (Stossich), or 

 8.46 mm. long by 220/* wide (Linstow). Tail 1/111 to 1/119 of total 

 body length (fig. 345 c). Pharynx 250 to 270/* long; anterior esoph- 

 agus 960 to 970/i long; posterior esophagus 3.2 mm. long. Cordons 

 extend 550/* posteriorly from head and anastomose 300/x from head 

 end. Tricuspid papillae 630/c from head end. Caudal alae thick, 

 vesicular, not spread out laterally in leaflike arrangement, but cov- 

 ering most of lateroventral surface of body; they originate 800/* 

 anterior to the cloaca. Four pairs of preanal and 5 pairs of postanal 

 papillae. Left spicule (fig. 345<?) atrophied in appearance, very 

 slender and flexible, 470/* long by 8/* wide; right spicule (fig. 345c?) 

 large and robust, 900/* long by 35/x wide (Stossich) or 620/* long 



3612—27 20 



