150 



STEONGYLUS VENTEICOSUS, Eud. 



Plate XX. 



Fig. I. Male, natural size iudioatod by line and sm ill figure of worm: a, head ; b, 



bursa and spioula. 

 Fig. 2. Female, natural size indicated by line and small figure of worm: a, head; 



h, genital orifice. 

 Fig. 3. Head: a, mouth; 6 6, ohitiiious cap surrounding it; c, oesophagus. 

 Fig. 4. Portion of skin showing eight of the fourteen lines: o a, the two lateral 



lines: 6 6, the dorsal and ventral lines. The dots indicate depressions 



where the longitudinal and the latitudinal lines cross. 

 Fig. .'>. Cephalic end: a, head ; 6, oesophagus. 

 Fig. 0. Spiculum : a, its chitinous portion; 6, the protractor muscle; c, the fringe 



edging the membranous portion ; d, the distal eud covered by membrane. 

 Fig. 7. Female, natural size indicated by line: This female is more characteristic of 



the species than that of Fig. 2, but is not quite mature. 

 Fig. 8. Bursa with spicula. 

 Fig., 9. Bursa spread out: a, ventral costio; 6, ventro-lateral ; c, lateral, of which 



there seems to be an accessory branch ; d, dorsal-lateral; e, dorsal, which 



also has an accessory branch. 



