4 PEOCEBDINGS OP THE ]SrATI01«J"AL MUSEUM vol.72 



310/^. The buccal capsule is from 131 to 178/* wide. The esophagus 

 (fig. 3) is from 638 to 740/* long by 168/x in maximum width. The 

 nerve ring is located anterior to the middle of the esophagus, dividing 

 the latter into two parts having an approximate ratio of 4 to 6. In 

 a specimen from Felis tigrma the cervical papillae divide the esoph- 

 agus into two parts, the ratio of the anterior part to the posterior 

 part being 17 to 13, whereas in a specimen from Felis eyra this ratio 

 is 25 to 17. 



The spicules are long and slender (fig. 6), and are from 1.15 to 

 1.17 mm. long. The short gubernaculum is from 60 to 74/i long by 

 lOjU. wide. The bursa (fig. 5) is from 470 to 554/x wide when spread 

 out. The ventro-ventral ray is a little longer and also somewhat wider 

 than the latero-ventrai ray. The tips of these rays extend to within 

 a short distance from the margin of the bursa. The externo-lateral 

 ray, which terminates at a considerable distance from the edge of 

 the bursa, is much smaller than the medio-lateral and postero-lateral 

 rays from which it diverges. The medio-lateral and postero-lateral 

 rays are large and parallel, their tips extending almost to the poste- 

 rior margin of the lateral lobes of the bursa. The distance between 

 the tips of the externo-lateral rays when the bursa is viewed from 

 the dorsal aspect is 180/x. The dorsal ray is from 151 to 168/a long 

 and divides into two branches at a distance of about 35/(, from the 

 posterior end. Each branch of the dorsal ray is tridigitate. The 

 prebursal papillae are located at a distance of 504,a, from the posterior 

 margin of the lateral lobes of the bursa. As noted by Alessandrini, 

 a rugged structure is present on each side near the anogenital opening 

 (fig. 6), the surface of which appears granular in optical section. 



Female. — The females are from 10 to 11 mm. long by 344 to 378/a 

 wide in the region of the vulva. The maximum diameter of the 

 buccal capsule varies from 168 to 210ft. The esophagus is from 739 

 to 806/1 long by 185 to 210/a in maximum width. The cephalic 

 papillae divide the esophagus into two unequal parts, the ratio of the 

 portion anterior to the papillae to that posterior to the papillae being 

 26 : 20 in a specimen from Felis tigrina., whereas in a specimen from 

 FeUs eyra the ratio is 22 : 23. The nerve ring is anterior to the 

 cephalic papillae, the excretory pore being in a position inter- 

 mediate between the nerve ring and cephalic papillae. 



The vulva is located near the beginning of the posterior third of 

 the body. In an immature specimen about 8 mm. long the vulva is 

 located at a distance of 2.8 mm. from the tip of the tail. In a speci- 

 men about 11 mm. long the distance from the vulva to the tip of the 

 tail is 3.3 mm. The tail (fig. 2) is from 126 to 176/t long and is 

 gradually attenuated. The slender bristle that is inserted in the tip 

 of the tail is from 17 to 25/1 long. 



