NO. 1105. FEOCEEDINGS OF THE NATIONAL MUSEUM. 213 



are accepted only x^ro vision ally/ while Fimhriaria is used at present 

 only as a matter of convenience. 



Key to the genera of the subfamilies Ta'uiinu', Mesocestoidina', Ano- 

 plocephalime, and Dipylidiina^ of the cestode family TiieniidiB, including 

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



Ta'nikliV. 



[Tapeworms of hares ami rabbits in ronian.] 



1. Head with fonr cnp-shaped suckers; rostellum iireseut, but not always evident; 



uterus without any .s])ecial pore ; genital pores generally marginal 2 



Head geiieraUji absent; grnital povr^ maryinal. Host: IHrds 34 



2. Genital pores veniro-median (Mesocestoidina") Mcsocestoides:^ 



Genital pores nutrginal ." 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 nianinials Anoiiloeepliatimv (p. 149), 5 



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

 Htjmcnotepis) 4 



4. Egg with thin outer shell and thiek hrown inner shell; nterns median and longitudinal 



tvitlt. lateral branches; larval stage a cijsiicereus, ewnnrus, or echinococcus, generally 

 in herbivora; adults in carnivora (Ta'niina') Twnia.' 



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

 genera J »irt/>i/(V(, Choanota'nia, (otngnia. Dicranotania, Drepanidolirniain thesubfarnily 

 I)ipylidiin;e, see my IJeportupcui the Present Knowledge of the Tapeworms of Poultry, 

 Bull. 12, Bureau of Animal Industry, 1896. 

 " 1863, J/esoces/oir/e.s', Vaillant, L'Institut. No. 1524. Tyjye, Mesocestoides anibigmis, 



Vaillant, 1863. 

 1885, I'tgchophgsa, Hamann, Zeitschr. f. wiss. Zool., XLII, p. 740. Type, To'nia 



lineata, Goeze, 1782. 

 3 1758, Tania, LInn.kus, Systema naturte, 10 ed., p. 646, 819. Type by elimination 



Tania solinm, Linna'us, 1758. 

 1800, Alysehninthns, Zedei;, Erster Xachtrag zur Naturg. d. Eingeweidewiirmer, p. 



221. Tonia, Linna-us, renamed, hence type Ta'nia solium, Linn;eus, 1758. 

 1803, Hah/sis, Zeder, Anleitung znr Naturg. d. Eingeweidewiirmer, p. 298. Ahjsel- 



minthus, Zeder, renamed, hence type Tivnia solium, Linnieus, 1758. 

 1850, Arhgnchotania, Diesixg, Systema helmiuthum, I, p. 497. Subgenus containing 



type of genus, hence type Tania solium, LinnaMis, 1758. 

 1858, Acauthoirias, Weinland, Human Cestoides, p. 51. Type, Cysticercus acantho- 



irias, Weinland, 1S58 = Cysticercus cellulosa', Rudolphi:=.larva of Teenia solium. 

 1858, Taniarhynehus, Weinland, Human Cestoides, p. 46. Type, Taniia mediocanellata , 



Kiichenmeister, 1852= Ta'«m saginata, Goeze, 1782. 

 1858, Echinococcifer, Weinland, Human Cestoides, p. 52. Type, Ta'nia echinococcus, 



Siebold, 1853. 

 1863, Cystotania, Leuckart, Die menschlichen Parasiten, I, p. 223. As subgenus 



including type of genus, hence type Tania solium, Linnanis, 1758. 

 To this list of synonyms must be added the subgenera Cjisticercus, Cwnurus, 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 iirst i>ro- 

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

 and specific names of larval cestodes {Cysticercus, C(rnnrus, Echinococcus, Finna, 

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



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

 totwnia), Caenurus, and Echinococcus. Tamia must be substituted for the first sub- 

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

 subgenus. 



