461 



Physaloptera caucasica, v. Linstow, 1902. 



The male measures 14-2 mm. in length and 071 mm. in breadth ; 



the bursa is broad, rounded off in front and narrower at the back ; 



the right spicule measures 0^62 mm. in length, the left spicule 



1*76 mm. ; there are two papillae in 

 front of the orifice of the cloaca, four 

 behind it and six unpedunculated on 

 the tail. The female measures 27 mm. 

 in length, 1-14 mm. in breadth ; the 

 caudal extremity is rounded off ; the 

 vulva is on the border of the first 

 and second sixth of the length of the 

 body; the eggs have thick shells, 

 and measure 57 yu, by 39 //,. It has 

 hitherto only been observed once, 

 by Menetries in the intestine of man 

 (Caucasus). 



p.e. 



FIG. 339. Bursa ofSyngamus trachealis. 

 a., anterior ray cleft ; a.e., antero-external ; 

 tf/.tf.,antero-me(lian; w./.,postero-median ; 

 p.e., postero-external ; /., one branch of 

 posterior (trifurcate). (Stephens.) 



Physaloptera mordens, Leiper, 

 1907. 



Large worms resembling an im- 

 mature Ascaris lumbricoides. 



The inner lancet-shaped teeth have a sharp cutting edge towards 

 the lumen. Below each is a cuticular boss projecting into the mouth 



(fig- 34) 



Male 30 to 50 mm., bursa with four pairs of pednnculated papillae, 

 the second and third lying external to the first and fourth on each side. 

 Spicules unequal, one slender (4-6 mm.), the other stouter (6 mm.). 



Female 40 to 55 mm. Tail sharp. Vulva opens between the 

 anterior fourth and fifth of the body. Eggs 43*6/4 by 35*3 p with a 

 thick smooth shell. 



Habitat. (Esophagus, stomach, small intestine of man (several 

 cases). Nyasaland and Portuguese East Africa. 



Family. Ascaridae, Cobbold, 1864. 

 Sub-family. Ascarinae. 



Without cesophageal or intestinal diverticula ; spicules without 

 flanges. 



Genus. Ascaris, L., 1758. 



Intermediate lips and auricles absent. Lips edged with fine teeth. Lips triangular 

 in cross section. Not grooved on internal surface. 



