84 BULLETIN 69, UNITED STATES NATIONAL MUSEUM. 



alternate. Genital canals pass dorsal of the longitudinal excretory 

 vessels. Vas deferens coiled, seminal vesicle absent. Testicles 20 

 to 25 in the posterior portion of the segment. Uterus with very 

 irregular lobulations. Adults in birds. 



Type-species. — Angularia heema Clerc, 1906. 



ANGULARIA BEEMA Clerc, 1906. 



For description see Clerc, 1906b, pp. 728-730, figs. 27-31. 

 Host. — Riparia riparia. 



Genus CATENOTvENIAa Janicki, 1904. 

 Cladotsenia Cohn, 1901 (in part). 



Generic (^m^Tios'is.^Dipylidiinse: Scolex unarmed, without rostel- 

 lum. Segments considerably longer than broad. A single set of 

 reproductive organs in each segment. Genital pores irregularly 

 alternate. Genital canals pass dorsal of longitudinal excretory ves- 

 sels and nerve. Testicles numerous, in posterior portion of segment. 

 Female glands in anterior portion. Uterus consists of a median stem 

 and lateral branches. Adults in mammals. 



Type-species. — Catenotsenia pusilla (Goeze, 1782) Janicki, 1904. 



Genus DIPYLIDIUM Leuekart, 1863. 



Generic diagnosis. — Dipj^lidiinae : Rostelium armed with several 

 rings of rose-thorn booklets, which usually have a discoidal base. 

 Suckers unarmed. Gravid segments generally longer than broad. 

 A double set of reproductive organs in each segment. Genital pores 

 double and opposite. Testicles very numerous, scattered throughout 

 entire medullary parenchyma. Vas deferens coiled, seminal vesicle 

 absent. Uterus at first reticular, later breaking up into egg cap- 

 sules, each containing one or more eggs. Eggs with two shells. 

 Adults in mammals and birds. 



Type-species. — Dipylidium camnwm (Linnaeus, 1758). 



Genus OOCHORISTICA Luhe, 1898. 



Generic diagnosis. — Dip3didiin8e : Scolex unarmed, without rostel- 

 ium. A single set of reproductive organs in each segment. Genital 



« Fuhrmann (1907a, p. 293) would suppress this generic name in favor of Cladotsenia 

 Cohn, 1901, type-species, Tsenia globifera Batsch, 1786, a species which (see Fuhrmann, 

 1906a, p. 220) is considered sufiiciently similar to Tsenia solium to belong in the same 

 genus, but, under the rules of nomenclature, if Cladotsenia globifera is transferred to 

 Tsenia, the generic name Cladotxnia becomes a synonym of Tsenia, and can not be 

 used as a separate genus so long as the species globifera remains in Tsenia. Cohn 

 (1901b, p. 380) definitely designated Tsenia globifera as the type of Cladotsenia, and 

 hence no other species can be taken as the type of this genus. Accordingly, Fuhr- 

 mann's proposal to take Tsenia dendritica Goeze (one of the species originally included 

 both in Cladotsenia Cohn and Catenotsenia Janicki) as type of Cladotxnia Cohn, and 

 to suppress Catenotsenia Janicki is entirely at variance with article 29 of the Inter- 

 national Code of Nomenclature. 



