NEMATODE GENUS PHYSALOPTEEA. 1091 



the anus, 4 stalked and in a transverse row just in front of middle 

 of tail, 2 stalked and at the junction of last tail quarters. 



Eggs ,52 X 32 /x. 



Host : Pelis catus domesticus . Stomach and intestine. Egypt. 



(52) Physaloptera cesticillata Sonsino, 1889, 



Length 1^-3 mm. and more, slightly attenuated anteriorly, 

 obtuse behind. Two retractile lips, with teeth on its inner front, 

 and with at least one well-developed latei-ai papilla. A well- 

 defined collar over the lips. 



Male. Bursa of variable size, elongate and bent inwards. 

 Four pairs of lateral pedunculate papillse, and six pairs of ventral 

 sessile papillas plus two unpaired papillse, one of which is pre- 

 anal, and the other between the last pair of ventral post-anal 

 papillae. Except for the posterior unpaired papillae, the arrange- 

 ment of the papiike is similar to that found in Ph. papillotruncata. 

 Ventral surface of bursa with longitudinal rows of spikes. 



Female immature. Tail mucronate and anus 500 jjl from its tip. 



Host : Canis cerdo. Stomach. Egypt. 



(53) Physaloptera torquata Leidy, 1856. 



Males unknown. Females •25--5 inches long by '02 inches thick 

 (3-6 lines x '25 of a line). 



Body cylindrical, attenuated anteriorly ; a conspicuous and 

 narrow collar round the head ; lips half conical, each v/ith a pair 

 of lateral papillae and a group of four teeth on its apex, of which 

 one is external to the ofchers. Tail short, conical, obtuse, recurved 

 from the anal aperture. 



Host : Meles labirodorica. Stomach. [America.] 



Stossich (1889) lists this species under Sp. Inq., but the nature 

 of the lips and the collar round the head, together with the 

 nature of the teeth, strongly suggest that this species is a true 

 Fhi/saloptera. 



(54) Physaloptera mephites Sola^net, 190?. 

 Host : Mephites suffocans. Buenos Aires. 



(The description of this species, published in the ' Revista del 

 Centro d. Estados d. Agronomia y Veterinaria,' Buenos Aires, 

 was not available for reference.) 



(55) Physaloptera elegantissima Stossich, 1902. 

 Length of female 50-60 mm. Male unknown. 



Body large, cylindrical, and attenuated antei-iorly. A large 

 more or less imbutiforni cuticular expansion embracing most of 

 the cephalic region except the lips. Two lateral lips, large, and 

 each has three large papillae — one central and two latei^al. 

 External tooth large and conical, supplemented by two subequal 

 denticles. Tail conical and rounded. Eggs smooth and elliptical 

 with very thick shell. 



Host : Ratelus ccqjensis. Stomach. Eritrea. 



