256 Endoparasites : Georglna S^veet. 



Figs. 14-21. — OxYSPiKruA parvovum, sp. n. 



Fig. 14: — Male and female worms. x IJ. 



15 — Head and anterior part of body of female worms, show- 

 ing position of pharynx (ph.), nerve-ring (n. r.), 

 excretory pore (e. p.), oesophagus (oes.), intestine 

 (int.), and lateral line (1. 1.). x about 60. 



16 — Outline of head of male, showing oral papillae from 

 ventral surface. x 40. 



17 — Head of male, showing oral papillae from ventral sur- 

 face. X about 1 20. 



18 — Head, showing structure of pharynx in lateral view. 

 X about 380. 



19 — Tail of male worm, showing long (1. s.) and short (s. s.) 

 spicules, 5 pairs of anal papillae (a .p.), intestine 

 (int.), ductus ejactulatorius (d. e.), and position of 

 cloacal opening (c. o.). x about 60. 



20 — Tail of female worm, showing position of vulva (v.), 

 anus (a.), ovai-y (o.), vagina (va.), and intestine 

 (int.). x 80. 



21 — Three eggs, showing enclosed embryo. x 220. 



END OF VOLUME XXIII., PART I. 



[Published August, 1910.] 



