BY VERA IRWIN-SMITH. 



423 



29). Common trunk very short, dividing dichotomously into four branches, the 

 two branches from the first division as long as the common trunk; the whole 

 system extending straight back, branches looped and coiled in region of second 

 bifurcation; no uteri in front of this, all four intertwined and coiled in posterior 



Fig's. 17-19. Larval Phijsaloptera bancrofti, from Gymnodactylus platurus. 

 17. Whole worm (x 7.5) ; 18. Anterior end of body, showing oesophagus (x 27) : 

 19. Anterior end, showing junction of muscular and glandular oesophagi, nerve- 

 ring, and post-cen'ical papillae (x 100) • 



Figs. 20-24. Physaloptera sp. (larva), from Lialis burtonii. 

 20. Whole worm (x 7.5); 21. Anterior end of bodv (x 27); 22. The two 

 lateral lips (x 190); 23. Anterior extremity (x 100); 24. Posterior end of body 

 (x 100). 



Fig-s. 25-29. Physaloptera sp. (5), from Hinulia sp. 

 25. Whole worm (x 7.5); 26. The two lateral lips (x 290); 27 

 oesophagus and intestine (x 30) ; 28. Posterior end of body (x 30) ; 

 portion of female genital system (x 27) . 



Junction of 

 29. Terminal 



region of body, extending back nearly to anus; uteri very narrow, poorly deve- 

 loped. Receptacula seminis not observed. No developed eggs. 



Measurements. — Total length, 8.56 mm.; maximum diameter. 480 ^n; diameter 

 at base of collarette, 176 /j,; at posterior third of body, 480 yn; at anus, 208 /a. 

 Tail, 256 fj. long. Distance from cephalic extremity of nerve-ring, 176 /j. ; post- 

 eervical papillae, 256 /x, vulva, 2.24 mm. ; most anterior loop of uterus, 4.50 mm. 



