In 1941 Rogers (Rogers) described a new species of Diplorchis 

 (D. scaphiopi) from the f rog, Scaphiopus bombifrons Cope (United States of 

 America, Oklahoma), and gave a short description and schematic repre- 

 sentation of the free -swimming larva of that species. Judging from the 

 data of Rogers the larva of D. scaphiopi hardly differs from 

 the larva of D. ranae Ozaki. 



19. The development of Neopolystoma Price 



p. 190 



In the summer of 1949, U. A. Strelkov, a collaborator of our 

 laboratory, studied N. palpebrae, a parasite of the far-eastern turtle 

 Amyda sinensis (Wieg.), which he described in 1950 (Fig. 50). This species 

 appears to be a typical representative of the genus; the latter was charac- 

 terized by Price (Price, 1939) as being very close to Polystomoides and 



Polystomoidella but differs from 

 them in the absence of middle hooks. 

 Development in the eggs of N. pal- 

 pebrae takes place in Z4 days. The 



I 



A 



-K \^ 





/"^i.^ 



( 



-\ 



•»-=c^ 



\K 



C=5=^ 



Fig. Z14. Neopolystoma palpebrae 

 Strelkov, the larva of which emerge 

 from the egg (ciliary covering?), 

 strongly compressed. 



Fig. 215. Neopolystoma palpebrae 

 Strelkov, attaching armature of the 

 larva which has just emerged from 

 the egg. 



larva which emerges from the egg (Fig. 214) is apparently covered with a 

 continuous very small and tender ciliary covering. U. A. Strelkov and 

 A. V. Gussew, who together observed the free-swimming larvae, in- 

 dicated that the ciliary covering of N. palpebrae is scarcely noticeable; 

 in the beginning it even seemed to thenn that the larvae were completely 

 devoid of ciliary coverings. The larva has the usual shape for the Poly - 

 stomatidae; its length is about 0. 3 mm and its width is about 0. 1 mm. 

 The attaching disc is rounded, sharply delineated from the rest of the 

 body and has a diameter of about 0. 08 mm. The larva has four eyes 

 located in the customary places, the digestive system consists of a 



206 



