152 TAPEWORMS OF HARES AND RABBITS STILES. VOL.XIX. 



que la pocbe pe~niale soit situee exactemeiit en son milieu ; le pe"nis, qui est trrs long, 

 decrit done pour sortir une courbe accentuee. La saillie que ce dernier organ e peut 

 faire en dehors est considerable. 



Le de"veloppement de la poche peniale iniprime des modifications particulieres a la 

 forme de cet animal. La poche pe~niale occupe d'abord la plus grande partie de 

 1'anneau; par suite de la rapidite" de son developpement, qui marche beaucoup plus 

 vite que celui du reste de 1'anneau, elle forme, sur le bord, une saillie tres forte qui 

 e'efface a mesure que 1'anneau grandit. La syme'trie se trouve ainsi rctablie, mais 

 le developpement des ceufs fait bientot disparaltre completement 1'dnorme poclie 

 peniale. 



Les forts "grossissements permettent de voir les oeufs ; dont les caracteres sont 

 ceux des oeufs des Ttenias inermes [p. 242] vrais; leur appareil pyriforme est tres 

 developpe". Les muscles longitudinaux sont gros et forment une zone continue et 

 peu e"paisse. La z6ne de proliferation est tres dtendue et sous-jacente aux ventouses, 



Blancliard in 1891 found the same form in Lepus variabilis and 

 determined it as an Anoplocephala. 



Eailliet in 1893 transferred it to his genus Andrya. 



Through the kindness of Blanchard, I obtained a number of his speci- 

 mens upon which the following details are based : 



The worms attain 10 mm. in length by 2 mm. in breadth. The head 

 is unarmed, nearly square when viewed en face, measuring about 0.78 

 to 0.88 mm. broad ; it sits like a knob on the end of the strobila, from 

 which it is sharply defined. No rostellum was visible. The four suck- 

 ers are powerful, having a diameter of nearly 0.4 mm. Neck absent 

 segmentation beginning immediately back of the head; as many as 28 

 segments are present in some individuals. The anterior segments are 

 much broader than long and somewhat asymmetrical; the posterior 

 segments may measure 2.24 mm. broad by 0.8 mm. long; in some cases 

 they become nearly as long as broad. The genital pores are unilateral 

 and dextral. 



The reproductive glands are confined to the anterior third of the 

 worm, while the posterior two-thirds are occupied by the uterus. The 

 genital pore becomes almost or quite obliterated upon the atrophy 

 of the glands. The testicles are confined entirely to the aporose side 

 of the segment, as is the case with Anoplocephala mamillana and 

 A. transversaria. 



This parasite is very closely allied to A. mamillana of the horse. 

 From the descriptions of former authors and from my own studies, I 

 propose the following as a revised specific diagnosis: 



Diagnosis. Anoplocephala wimerosa (Moniez, 1880), E. Blancliard, 

 1891: Strobila attains 10 mm. in length by 1.5 to 2.25 mm. in breadth, 

 and contains from 10 to 28 segments which are always broader than 

 long; proximal segments often asymmetrical in outline. Distal seg- 

 ments attain about 2.25 mm. broad by 0.8 mm. long, rarely becoming 

 nearly as long as broad. Head unarmed, nearly cuboid, measuring 0.7 

 to 0.88 mm., and sits like a knob on the end of the strobila; rostellum 

 not observed; suckers 0.4 mm. in diameter, prominent, rounded, open- 

 ing diagonally forward ; posterior lobes absent. Keck absent. Gem 

 tal pores unilateral, dextral. The sexual glands are confined to the 



