264 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Morphology. — Seuratia (p. 262) : Mouth terminal with 2 trilobed 

 lips, each lobe with a minute papilla at its extremity. Cuticle at 

 anterior end of body (fig. 326 a and b) swollen to form a collar 

 with 2 large disks, posteriorly bilobed, and the free margin with 

 strong spines. Large tricuspid cervical papillae a little behind the 

 disks; from these papillae originate 4 longitudinal rows of spines, 

 extending to about the middle of the body. 



Male 15 mm. long. Caudal extremity (fig. 326 c) spirally coiled. 

 Caudal alae only very slightly developed. Caudal papillae very 

 delicate, 17 in number; of these, 4 pairs preanal, 4 pairs postanal, 

 and 1 unpaired at tip of tail, the latter a multicuspidate affair fig- 

 ured by Stossich in a way resembling the spiny knob of the tail of 



Fig. 326. — Seuratia shipleyi. a, Dorso-ventral and b, lateral view of 



ANTERIOR END; C, MALE TAIL; d, FEMALE TAIL; e, EGG. AFTER STOSSICH, 1900 



the larvae of many spirurids, a character maintained into adult life 

 in Desmidocerca aerophila (p. 209). 



Female 21.5 to 32 mm. (Seurat) or 35 mm. (Stossich) long by 

 500/* wide. Tail 180/* long. Vulva 14.6 mm. from head end in worm 

 32 mm. long. Ovejector (fig. 327) very long, 1.8 mm. Eggs (fig. 

 326e) small, ovoid, numerous, and embryonated at oviposition. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution, — Western Pacific, Australia and Africa (Algeria). 



Genus STREPTOCARA Railliet, Henry, and Sisoff, 1912 



Generic diagnosis. — Acuariinae (p. 211) : Mouth with 2 conical 

 projecting lips, originating from a depression, the margin of which 

 forms a denticulated collar. Esophagus short, swollen, muscular. 

 Two cervical papillae in form of a crescent with numerous teeth. 



