Occasional Papers of the Museum of Zoology 5 



been seen in whole mounts of the worm. Ovarian lobes of 

 mature and of most ripe proglottids are long and relatively- 

 slender. Vitelline glands are lateral, composed of many large 

 follicles, closely packed together. In mature proglottids the 

 vitellaria form thick masses while in more elongate proglottids 

 they form narrower masses. Uterine pouches appear early. 

 In old proglottids these reach to the vitellaria and come to oc- 

 cupy the greater proportion of the proglottid. There are about 

 seven to twelve well-marked uterine pouches on either side of 

 the mid-line in most ripe proglottids but in older proglottids, 

 well distended with eggs, the pouches are more irregular and 

 more numerous. Smaller pouches seem to have been crowded 

 in between larger pouches, especially in the region of the 

 median stem of the uterus, while the walls of the uterus in 

 some of the larger proglottids seem to have given way. Ducts 

 within the interovarial space could not be completely follow- 

 ed out in the preparation. 



The six-hooked embryo of uterine eggs measures about 

 0.015 mm. in diameter. No determination of the egg mem- 

 branes could be made. 



Notes on Paratypes : A specimen collected by A. S. Pearse 

 clearly belongs in this species. It differs from the type in hav- 

 ing a narrower head (a contraction state) and a narrower neck. 

 Its suckers are somewhat smaller, figure 3. These suckers 

 measure 0.070, 0.077. a"<i 0.076 mm. respectively, and their 

 cavities 0.04, 0.04, and 0.047 i^m- respectively. The fifth suck- 

 er measures 0.04 mm. in diameter and its opening 0.023 "i"i- 

 The head at the level of the posterior edge of the suckers meas- 

 ures 0.228 mm. in width and the neck at its narrowest part just 

 equals the width of the head. Since the neck is broken off 

 at 2.84 mm. back of the head and there may be a small por- 

 tion of it missing its full lenrth cannot be measured. The six 



