l, r )0 TAPEWORMS OF HARES AXD RABBITS STILES. voi.xix. 



all the double-pored forms in Dipylidium. R. Blanchard 1 in 1891 

 placed the double-pored forms in Moniezia, the single -pored forms in 

 Anoplocepliala; Stiles 2 in 1893 separated the double-pored forms from 

 Moniezia, but did not establish any genus for them; Railliet 3 in 1893 

 created the genus Ctenotcenia for the double-pored forms and An dry a 

 for the single-pored forms. 



My studies now lead me to adopt Cittotcenia for the double-pored 

 leporine cestodes, and to divide the unarmed single-pored forms 

 between the genera Anoplocepliala^ Andrya, and Bertia. 



Genus ANOPLOCEPHALA, E. Blanehard, 1848 (nee 



Stal 187O). 



1848, Anoplocephala, E. BLANCHARD, Ann. des Sci. nat., 3 ser., Zool., X, p. 344. Type 



by elimination, Tcenia equina perfoliata, Goeze, 1782. 

 1871, Plagiotccnia,* PETERS, Proc. Zool. Soc. Lond , p. 146. Type, Tcenia gigantea, 



Peters, 1856. 

 1891, " Plagotcenia, PETERS, 1871 "(as synonym) in R. BLANCHARD, Me~m. Soc. zool. 



France, IV, p. 446. 



Diagnosis. Anoplocephalinae with segments broader than long. 

 One set each of male and female organs in each segment; genital pores 

 unilateral (dextral 5 ) ; testicles in the aporose, ovary in the pore side of 

 the median field. Uterus a transverse tube with proximal and distal 

 pouches. Dorsal canals lie dorsal or lateral of ventral canal. Genital 

 canals cross the longitudinal canals and nerves dorsally. Calcareous 

 bodies (always?) absent from parenchyma. Eggs with well-developed 

 pyriform body. Hosts: Perissodactyla, Kodentia. 



Type. A. perfoliata (Goeze, 1872), E. Blanehard, 1848. 



1 Sur les Helminthes des Primates Anthropoides, Me"m. Soc. zool. France, IV, pp. 

 186-196. Notices helminthologiques : 7. Cestodes du groupe des Anoplocephalime 

 R. Blanchard, 1891, Me"m. Soc. zool. France, IV, pp. 443-450. 



2 A Revision of the Adult Cestodes of Cattle, Sheep, and Allied Animals, Bull. IV, 

 Bur. An. Ind., U. S. Dept. Agric. 



3 Trait<5 Zool. me'd. et agric., I. 



4 Max Braiin (1894, Verrnes, 36-37 Lieferung, p. 1138) erroneously gives the date of 

 this genus as 1870; R. Blanehard spells the generic name Plagotcenia. A typograph- 

 ical error in R. Blanehard, 1891, p. 446, gives Anoplocepliala the date of 1868, while 

 Brauu (loc. cit., p. 1133) dates the genus 1847. Errors of this kind naturally creep 

 into every author's writing. In this connection I would call attention to the list of 

 Cestoda given hy Braun (loc. cit., pp. 1133-1145). While this list is extremely valua- 

 ble in tracing the different species, it must not be looked upon as complete; further- 

 more, care must be exercised in using the dates of species given by Brauu. Rudolphi's 

 species of 1810 are erroneously given as 1808 ; Krabbe's species of 1869 are erroneously 

 given as 1870. A number of other species are also incorrectly dated. 



5 In A.wimerosa the pores are evidently dextral, but in the other species I am 

 unable to determine whether they are dextral or sinistral, either from the figures or 

 descriptions given by various workers. In one of my preparations of A. mamiUana 

 they are certainly sinistral; in another preparation they are apparently dextral. 

 Professor Zschokke has reexamined his preparations of A. mamiUana at my request 

 and writes me that he finds the pores dextral, which agrees with the topography 

 found upon a preparation by Railliet very recently sent to me. 



