NO. 1105. PROCEEDINGS OF THE NATIONAL MUSEUM. 159 



these segments, but they appear about twenty segments later, soon 

 becoming numerous and distinct and occupy the entire median field 

 except the portion taken up by the female organs. Plate VIII, fig. 6, 

 represents four segments about 15 mm. from the anterior end. About 

 forty testicles are present. The anlage of the female glands is near the 

 median line in the pore side of the median field; it is roundish and not 

 very prominent. The genital canals are not very distinct, but may be 

 traced to the lateral margin. Plate VIII, fig. 7, represents three seg- 

 ments about 30 mm. from the anterior end, The testicles have increased 

 in number and size ; the ovary and vitellarium are distinct, but the shell- 

 gland is scarcely visible j the genital canals have become well differen- 

 tiated, and the pore has developed. The greater majority of the genital 

 pores are on one side of the strobila, and are situated in the distal half 

 of the margin. In the specimen under discussion they range about as 

 follows : 



15. 16. 119. 44. 7. 5. 9. 



4. 4. 6. 6. 2. 2. 18.' etc * 



About 50 mm. from the anterior extremity the structure of the seg- 

 ment becomes complicated by the development of the uterus. My prep- 

 aration does not permit a study of its gradual development, but this 

 organ appears to be much more complicated than one would expect 

 from Eiehni's description. At first no distinct limits can be made out, 

 and one sees only numerous ova scattered through the segment. As the 

 testicles atrophy, however, and the uterus comes more distinctly into 

 view, the latter is apparently composed of a network of anastomosing 

 tubes, much like the uteri found in Moniezia, arid totally different from 

 the transverse uterus found in Cittotcenia, Bertia, and Anoplocephala. 

 As in the case of the anastomosed testicles of Fasciola, it is here often 

 impossible to distinguish whether we are dealing with anastomosing 

 tubules or branched tubules which lie close together. 



My limited material will not warrant a more minute study of the 

 uterus of this form. See also General Eemarks, p. 203. 



The cirrus pouch is seen to best advantage in segments in which the 

 uterus has begun to develop. It is pyriform and measures 0.4 mm. long 

 by 0.144 mm. broad. It is highly muscular, especially in its proximal 

 portion, and its middle portion contains a prominent dilatation repre- 

 senting a vesicula seminalis. Median to the pouch is found a roundish 

 body, which evidently corresponds to the "prostata" described by 

 Biehm. 



The vagina and large elongate receptaculum seminis lie distally of 

 the pouch and vas deferens, as Eiehm has already described. 



The ova measure 48 to 60 // in diameter j the pyriform body measures 

 20 ^ broad by 32 to 44 p. long. 



The following is proposed as a revised specific diagnosis: 



Diagnosis. Andrya cuniculi (K. Blanchard, 1891), Kailliet, 1893: 

 Strobila attains 100 cm. in length by 8 mm. in breadth. Head 



