NO. 1105. PROCEEDINGS OF THE NATIONAL MUSEUM. 213 



are accepted only provisionally, 1 while Fimbriaria is used at present 

 only as a matter of convenience. 



Key to the genera of the subfamilies TtBuiinaB, MesocestoidinaB, Ano- 

 plocephalime, and Dipylidiinse of the cestode family Tseniidie, including 

 all the species of adult tapeworms found in hares and rabbits. 



Tceniidce. 



[Tapeworms of liares and rabbits in roman.] 



1. Head with four cup-shaped suckers; rostellum present, but not always evident; 



uterus without any special pore ; genital pores generally marginal 2 



Head generally absent; genital pores marginal. Host: Birds 34 



2. Genital pores veutro-median (Mesocestoidina)) Mesocestoides.^ 



Genital pores marginal 3 



3. Head never provided with hooks; uterus transverse or reticulate ; egg generally 



with pyriform body; larval stage not known; adults in herbivorous and fru- 



givorous mammals Anoploccplialina? (p. 149), 5 



Head nearly always provided with hooks (T. saginata an exception; see also 

 Hymenolepis) 4 



4. Egg with thin outer shell and thick brown inner shell; uterus median and longitudinal 



with lateral branches; larval stage a cyslicercus, cocnurus, or echinococcus, generally 

 in herbivora; adults in carnivora ( Tceniinw) Tcenia.'- 1 



'For Andrya and Bertia, see pp. 154, 160 of this paper. For the newly proposed 

 genera Amabilia, Choanotcenia, Cotugnia. JJicranotamia, I)repanidota>,nia\v\ the subfamily 

 Dipylidiinse, see my Report upon the Present Knowledge of the Tapeworms of Poultry, 

 Bull. 12, Bureau of Animal Industry, 1896. 

 * 1863, Hesocestoides, VAILLANT, L'Institut, No. 1524. Type, Mesocestoides ambiguus, 



Vaillant, 1863. 

 1885, Pti/chophysa, HAMANN, Zeitschr. f. wiss. Zool., XLII, p. 740. Type, Tcenia 



lineata, Goeze, 1782. 

 3 1758, Twnia, LINNAEUS, Systema naturae, 10 ed., p. 646, 819. Type by elimination 



Tawia solium, Linmvus, 1758. 

 1800, Ali/selminthus, ZEDEH, Erster Nachtrag zur Natnrg. d. Eingeweidewiirmer, p. 



221. Tamia, Linnaeus, renamed, hence type Tania solium, Linmeus, 1758. 

 1803, Halt/sis, ZEDER, Anleitung zur Naturg. d. Eingeweidewiirmer, p. 298. Alysel- 



minthus, Zeder, renamed, hence type Tcenia solium, Linmeus, 1758. 

 1850, Arhyncliotwnia, DIESING, Systema helminthum, I, p. 497. Subgenus containing 



type of genus, hence type Ta>nia solium, Linnrous, 1758. 

 1858, Acanthotrias, WEINLAND, Human Cestoides, p. 51. Type, Cysticercus acantho- 



trias, Weinland, lSoS = Ciislicercuscellnlosw, Rudolphi^:larva of Twnia solium. 

 1858, Tamiarhyncltns, WEINLAND, Human Cestoides, p. 46. Type, Tcenia mediocanellata, 



Kiichenmeister, 1852 = Tcenia saginata, Goeze, 1782. 

 1858, Echinococcifer, WEINLAND, Human Cestoides, p. 52. Type, Tania echinococcus, 



Siebold, 1853. 

 1863, Cystotwnia, LEUCKART, Die menschlichen Parasiten, I, p. 223. As subgenus 



including type of genus, hence type Tcenia solium, Linnaeus, 1758. 

 To this list of synonyms must be added the subgenera Cysticercus, Cocnurus, and 

 Echinococcus. They take the date and authority of the author who first used them 

 in a subgeneric sense and not the date and authority of the author who first pro- 

 posed them, since according to the International Code, section 48, b, the generic 

 and specific names of larval cestodes (Cysticercus, Cocnurus, Echinococcus, Finna, 

 Hydatigena, Hydatis. etc.) are not entitled to the law of priority. 



The genus Tainia is frequently divided into three subgenera : Cysticercus ( = Cys- 

 totcenia\ Ccenurus, and Echinococcus. Tasnia must be substituted for the first sub- 

 genus (type T. aolium) and Echinococcifer must probably be substituted for the third 

 subgenus. 



