252 



MR. H. A. BAYLIS AND LT.-COL. CLAYTON LANE ON 



SO formed (PI. II. fig 6). The male has well-developed caudal 

 alse (PI. II. figs; 8 & 9), the lateral papillae being correspond- 

 ingly buried. The ventral papillae are stalked and cup-shaped 

 or forked at their ends. The lateral papillae are more widely 

 separated than those of the genotype. Tlie spicules are orna- 

 mented with granulations tending to .arrange themselves in 



Text-fiffure 4. 



oiroxys gangetica. Tail of female: a, ventral view; h, lateral view; 

 c, lateral view of tip, at a higher magnification, to show the " notch." 



Text-figure 5. 



Text-figure 6. 



L 



Text-fig. 5. — Spiros-ys gangetica. Female genital ovj 

 Text-fig. 6. — Spiroxj/s gangetica. Ovum. 



transverse rows, and each has a blunt tip surmounted by a clear 

 chitinous cap (PI. II. fig. 10). 



In the female the tail is relatively more slender than in the 

 genotype both in lateral a,nd in ventral views, while the notch 

 nea,r its tip and the hook formed by it are particularly delicate 

 (text- fig. 4,c). The generative organs (text-fig. 5) and eggs (text- 

 fig. 6) are of the generic type. 



