363] AXOPLOCEPHALIDJE—DOUTHITT 13 



it has a well developed external vesicula seminalis. The extraordinary 

 development of the ventral excretory system, moreover, is a character 

 of which one finds no suggestion in its nearest allies. These points argue 

 strongly for generic distinctness for this and the next species. Whether 

 to create for them a distinct genus or include them in the genus Andrya 

 is a question. However the uterine structure and testicular distribution, 

 combined with certain other undefinable resemblances seem evidences 

 of sufficiently close generic kinship to the known species of Andrya to 

 permit the inclusion of these forms in this genus. Yet the diagnosis of 

 the genus Andrya must be altered so as to admit these species. 



Andrya translucida sp. nov. 

 [Figures 14-16] 



Three specimens of this cestode were taken from a pocket gopher 

 (Geomys bursarius) from low, semi-swampy river bottom land at 

 Brainerd, Minnesota. The same gopher yielded also five specimens of 

 A. macrocephala to which it is evidently closely related. Since a great 

 many gophers were examined in this and other localities (see table, 

 page 62) it would seem that the species is a rare parasite of the gopher. 



The total length of the specimens at hand is 9 to 12 cm. The num- 

 ber of proglottids is 278 to 289. The greatest diameter of the strobila, 

 0.75 mm., is reached 3 cm. from the anterior end. Back of this the 

 proglottids become longer and narrower, the most posterior becoming 

 attenuated and some of those at hand measuring 0.3 mm. wide by 1.3 

 mm. long. The worm is quite transparent in life, due to the enormous 

 development of the excretory ducts. 



The scolex is 730 to 830^ long by 590 to 640/* wide. The suckers 

 stand out rather prominently and are separated from each other by 

 distinct grooves. They open obliquely forward, through orifices about 

 110//, across. A definite neck is present, 500 to 730/x, in length and 350 

 to 410/a in diameter. 



The genital pore is usually on the right margin but frequently a 

 number of adjacent proglottids have their pores on the opposite side. 

 The pore is located seven-tenths of the length of the lateral margin 

 from the anterior end of the proglottid. The cirrus pouch at the time 

 the sperms begin to enter is usually short and thick, being 75/i long by 

 40/* broad, and lying wholly laterad of the ventral excretory duct. In 

 succeeding proglottids it lengthens rapidly, becoming 160/i, long by 40/i 

 wide at its inner end which lies mediad of the ventral excretory duct. 

 The vesicula seminalis occurs both within and without the pouch, being 

 represented without by a coiled tube which is about five times the 



