334 LEWIS HENRY (iOUGH. 



There are five to seven testicles on each side, lying lateral 

 to the ventral canal. The entire course of the vas deferens 

 has not been made out, but the outer half of it runs ventral 

 to the dorsal canal, ^,nd dorsal to the ventral canal and 

 nerve. Between ventral canal and nerve the vas deferens 

 forms a number of very close and densely packed convolu- 

 tions, whose function is without doubt that of a vesicula 

 seminalis (fig. S, r. .v.). In a " teased" specimen this packet 

 of convolutions comes away entire. It appears ahnost to be 

 enclosed in a membrane, but the material was too macerated 

 to make quite sure. 



The cirrus pouch measures 75 /x in length; it opens into a 

 genital cloaca, which is directed laterally and anteriorly, and 

 opens near the anterior angle of the proglottid. 



The position of the female organs and their arrangement 

 appears to be the same as in Stilesia globipunctata 

 (Rivolta), the band of fibrous tissue between the uteri is, how- 

 ever, somewhat more strongly developed. 



The muscles are arranged in two layers, the inner being com- 

 posed of bundles of five to nine, the outer of only one to three. 



The eggs have two envelopes, an outer shrivelled one and 

 an inner oval or rounded one. They measui-e 38 |t x 24 /i over 

 the outer, 22 ^ over the inner envelope, the embryo measuring 

 about 14 /x (tig. 9). (Railliet's measurements were 14-17 jitx 

 13-17//.) The inner envelope is not provided with spines of 

 any kind. 



AviTELLINA CENTRIPUNCTATA (RiVOLTA), 1874. FigS. 1 to 9, 



17 to 35, 37 to 65. Text-fig. 2. 



Synonymy. 

 Taenia centripinutata, Rivolta, 187-i-. 

 Stilesia centripiuictata (Rivolta), Railliet, 1893. 

 Stilesia centripunctata (Rivolta), Stiles. 1893. 

 Stilesia centripunctata (Rivolta), Gougli, 1909" 



Literatiire. 

 Rivolta. — ' S(jpra aknuie specie di Taenia della Pecova," Pisa, IST-i. 

 Perroncito. — 'I Parassiti delluomo e deiili Animali Utili,' Milano, 

 1882. 



