NO. 1105. PROCEEDINGS OF THE NATIONAL MUSEUM. 193 



Industry- collection of Leidy (University of Pennsylvania); collection 

 of Harvard Museum of Comparative Zoology; collection of Ward; col- 

 lection of Stiles ; collection of Hassall. Europe : Berlin Museum ; collec- 

 tion of Leuckart; collection of Max Braun ; Halle Zoological Institute; 

 Vienna Museum; collection of Stossich; collection of Parona; collec- 

 tion of Monticelli; collection of Zschokke; collection of R. Blanchard; 

 collection of Eailliet; collection of Neumann; collection of Moniez; 

 British (South Kensington) Museum. Asia : Imperial University 

 of Japan, Tokyo. Technique of types : Corrosive sublimate, acetic acid, 

 acid carmine. 



Unarmed young stages deposited in collection of Bureau of Aiiimal Industry; col- 

 lection of U.S.N.M. ; collection of Stiles; collection of Hassall; collection of Berlin 

 Museum; collection of Leuckart; collection of R. Blanchard. 



Geographical distribution. Maryland (by Hassall), Florida (by Mills), 

 Long Island (by Peters), ? Puget Sound (collection of Leidy). 



Varieties. To classify the forms at my disposal, I am compelled to 

 recognize three varieties : 



(a) C. variabilis. B. A. I. Cestode series No. 117, type of the species 

 is designated as type of this variety. The posterior liaps of the seg- 

 ments are nearly straight; genital pore in about the middle of the lat- 

 eral margin. Habitat: Lepus sylvaticus. 



(b) C. variabilis angusta. B. A. I. Cestode series No. 1119, designated 

 as type and deposited in the United States National Museum. This 

 variety is only about 2 mm. broad, the posterior flap is straight and does 

 not overlap prominently, the genital pore is generally in the posterior 

 half of the lateral margin. Pores occasionally single. 



(c) C. variabilis imbricata. No. 1246, U.S.N.M., borrowed by B. A. I.; 

 B. A. I. Cestode series No. 1246, designated as type and returned to 

 United States National Museum. At first sight it seems almost like 

 splitting hairs to create a variety for these specimens the technique of 

 which was different from that of C. variabilis. The worms were col- 

 lected by Kobert Mills, an enthusiastic collector at Chuluota, Florida, 

 and kindly presented to the United States National Museum. They 

 were placed in 95 per cent alcohol, accordingly they are somewhat con- 

 tracted. The posterior border of the segments is lobed, a character 

 which is quite constant, and overlaps the next following segment about 

 one-third of its length so that the segments have a general campulate 

 appearance. 



Subfamily DliPYILIDIIlST^E, Railliet, 1896. 



1850, Section Ehynchotcenia, 1 DIESING, Sy sterna Helminthum, I, p. 497. 



1858, Subf. Malacolepidota (Soft-shell Tapeworms), WEINLAND, Human Cestoides, p. 52. 



1863, Cystoidew, R. Leuckart, Die menschlichen Parasiten, I, p. 389. 



1864, Subg. Rhynchotwnia, 1 DIESING, Sitzber. Akad. Wiss. Wien, XLIX, 1, p. 365. 



iKhynchotwnia, Diesing, 1850, a " section" of Toenia, may be interpreted as a sub- 

 genus; by the law of priority, however, it falls as a synonym of Fimbriaria, Frolich, 

 1802, taking of course the same species as type, i. e., Tceuia malleus, Goeze, 1782. In 

 order to meet objection to this ruling, should objection arise, I here definitely pro- 

 pose Tcenia malleus, Goeze, as type of the subgenus. 



Proc. N. M. vol. xix 13 





