238 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



nasuta Railliet. Henry and Sisoff, 1912; C heilospirura nasuta 

 (Rudolphi, 1819) Ransom, 1916. 



Hosts. — Primary : Gallus gallus; secondary : Unknown, but prob- 

 ably arthropods. PorceUio laevis reported as intermediate host by 

 Piana ; apparently he was dealing with Dispharynx spiralis. 



Location. — Proventriculus and gizzard and connective tissue 

 between these. 



Morphology. — Dispharynx (p. 237) : Two small lateral lips (fig. 

 300a). Worms white or red. Esophageal bulb with 3 teeth, accord- 

 ing to Schlegel. Cordons similar to those in D. spiralis (p. 239). 



Male 5 mm. long, filiform. Tail end (fig. 3006) spiral, according 

 to most writers; Schlegel says it is not. According to Schlegel, the 

 right spicule is long and thin, the left one-third as long, and thicker ; 

 both are dark brown. Five pairs of postanal papillae. 



a. 



Fig. 300. — Dispharynx nasi ta. Head and tail of male. After Dujakdin, 1845 



Female 5 to 9 mm. long, or 9 to 10 mm. according to Schlegel. 

 Tail end conical, or, according to Schlegel, awl-shaped. Vulva in 

 anterior portion of body, according to Schlegel; some writers say 

 that vulva is in posterior portion ; this species has been confused with 

 D. spiralis in some cases and some writers would unite the two as 

 D. nasuta, Eggs thick-shelled. 



Life history. — Unknown; Piana reported a life history involving 

 intermediate stages in the sow-bug, PorceUio laevis, but later writers 

 believe he was dealing with D. spiralis. The 2 species may have very 

 similar life histories. 



Distribution. — North America (United States), South America, 

 Africa (Belgian Congo), Australia, and Guam. The records of this 

 worm from various localities are believed by Kailliet to be records of 

 D. spiralis (p. 238). Both species need reconsideration before one 

 may undertake to give their distribution with any certainty. 



DISPHARYNX SPIRALIS (Molin, 1858) Skrjabin, 191fib 



/Synonyms. — Dispharagus spiralis Molin, 1858; Dispharagus nasu- 

 tus of Piana, 1897; Dispharagus spiralis columbae Bridre, 1910; 

 Acuaria spiralis (Molin, 1858) Railliet, Henry, and Sisoff, 1912. 



