320 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



KEY TO SPECIES OF CERATOSPIRA 



1. Male 14.6 mm., female 18 mm., long. Vulva near middle of esophagus. Long 



spicule 968m in length Ceratospira ophthalmica, p. 320. 



Male 20 mm. long; female length unknown. Vulva near posterior end of 

 esophagus. Long spicule over 3 mm. in length. 



Ceratospira vesiculosa, p. 320. 



CERATOSPIRA VESICULOSA Schneider, 1866 



Hosts. — Primary: Psittacus sinensis (Eleotus pectoralis) ; second- 

 ary: Unknown. 



Location. — Orbital cavity. 



Morphology. — Ceratospira (p. 319) : Head rounded, with (?) pa- 

 pillae. Buccal cavity short. Cuticula marked by widely separated 

 annulations with sharp projecting edges. 



Male 20 mm. long. Caudal extremity rolled spirally and with 

 thick vesicular alae. Caudal papillae (fig. 384) asymmetrical, 11 

 on one side, 12 on the other ; 1 pair is near tip of tail, 3 pairs form a 

 group on either side of cloacal aperture, and the preanal papillae 

 (7 on left side, 8 on right side) are distributed at unequal intervals. 

 Two unequal spicules, one very short and cornet-shaped, the other 

 very slender and over 3 mm. long. 



Female length unknown (specimen incomplete). Tail rounded. 

 Vulva in anterior part of body, near posterior end of esophagus. 

 Viviparous. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — Europe (Germany (Zoological Garden, Berlin)). 



CERATOSPIRA OPHTHALMICA (Linstow, 1898) Ransom, 1904 



/Synonym. — Ancyi'acanthus ophthalmicus Linstow, 1898. 



Hosts. — Primary: Carpophaga brenchleyi (=Zonoenas breneh- 

 leyi) ; secondary : Unknown. 



L^ocation. — Orbital cavity. 



Morphology. — Ceratospira (p. 319) : Head (fig. 385a) surrounded 

 by 6 cephalic papillae. Buccal cavity wide. Caudal extremity 

 rounded in both sexes. Cuticula with transverse annulations 13/* 

 wide, with swollen posterior edges. 



Male 14.6 mm. long by 390/x wide. Esophagus 1/18, tail 1/370, of 

 body length. Caudal end curved hook-like, with broad alae. Nine 

 to 10 pairs of preanal and 4 pairs of postanal papillae (fig. 3855). 

 Spicules unequal, the right one short (264/x) and broad, the left long 

 (968/x) and slender. 



Female 18 mm. long by 470/x wide. Esophagus 1/23, tail 1/54, of 

 body length. Vulva near anterior end of body, about at the middle 



