T^NIOID CESTODES OF NORTH AMERICAN BIRDS. 83 



papilla. Testicles very numerous, entirely surrounding the female 

 genital glands. Uterus ventral, growing laterally between the 

 excretory vessels into the cortical parenchyma. Adults in birds. 



Type-species. — CyclorcJiida omalancristrota (Wedl, 1856) Fuhr- 

 mann, 1907. 



Genus GRYPORHYNCHUSa Nordmann, 1832. 



Acanthocirrus Fuhrmann, 1907 (type, A. macrorostratus Fuhrmann, 1907). 



Generic diagnosis. — Dipylidiinse : Rostellum armed. ' Genital pores 

 unilateral. Genital canals pass between the longitudinal excretory 

 vessels. Root of cirrus with one or two pairs of powerful spines 

 lying in special pockets. Testicles few (6 to 8). Uterus sac-like. 

 Adults in birds. 



Type-species. — Gryporhynclius pusillus Nordmann, 1832 = larva of 

 Acanthocirrus macropeos (Wedl, 1856). 



GRYPORHYNCHUS PUSILLUS Nordmann, 1832. 



For description see Krabbe, 1869b, p. 279, fig. 84 {Taenia macro /jeos Wedl) . 



Host. — Nycticorax nycticorax. 



GRYPORHYNCHUS CHEILANCRISTROTUS (Wedl, 1856). 



For description see Clerc, 1906b, pp. 716-718, figs. 7-11 (Dilepis macropeos). ^ 



Host. — Ardea cinerea. 



GRYPORHYNCHUS MACROROSTRATUS (Fuhrmann, 1907). 



For description see Fuhrmann, 19G7b, pp. 527-528, figs. 24-27 (Acanthocirrus 

 macrorostratus) . 



Host. — Anthus pratensis. 



Genus ANGULARIA Clare, 1906. 



Generic diagnosis. — Dipylidiinse: Rostellum armed with a zigzag 

 crown of numerous hooks (about 50). Genital pores irregularly 



C' Acanthocirrus, described by Fuhrmann (1907b) for the two species A. macroros- 

 tratus (designated as type by Fuhrmann, 1908a, p. 63) and Dilepis macropeos (Wedl) 

 of Clerc, 1906 falls into synonymy. Fuhrmann (1908a, p. 63) lists the following species 

 in Acanthocirrus: A. macrorostratus, A. cheilancristrota (Wedl, 1856)=Dilepis macropeos 

 (Wedl) of Clerc, and A. macropeos (Wedl, 1856). Krabbe (1869b, p. 279) who ex- 

 amined Wedl's original specimens of Tsenia macropeos, states that in the shape and 

 size of the hooks they correspond so exactly to Gryporhynchus pusillus that the latter 

 must be considered the larval form of Tsenia macropeos. Now as Gryporhynchus 

 pusillus de'scribed in 1832 by Nordmann is the only original and hence type-species 

 of Gryporhynchus, this generic name takes precedence over any later genus in which 

 its type may be placed. Accordingly the placing of Txnia macropeos Wedl=Grypo- 

 ■rhynchus pusillus in Acanthocirrus necessitates the dropping of the name Acanthocirrus. 



&The form which Clerc describes and figures under the name Dilepis macropeos, 

 according to Fuhrmann (1908a, p. 63), is in reality the species Tsenia cheilana'istrota 

 Wed], 1856. 



