40 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.55. 



1788<j; Eydatula Abildgaard, 1790a, part; Hydatis Virey, l798a, 

 part; Polycefhalus Zeder, 1800a; Coenurus Rudolphi, 1808a; Poly- 

 cephops Rafinesque, 1815a; Multiplex Liautard in Hall, 1911 (re- 

 viewer's error). (For additional synonyms, see Hall, 1910.) 



Generic diagnosis. — Taeniinae: Strobilate stage similar to that of 

 genus Taenia. Large hooks usually with a sinuous handle. The 

 vagina usually shows a reflexed loop in the vicinity of the lateral ex- 

 cretory canals. Larval stage a coenurus, a bladderworm with a par- 

 ent vesicle to which are attached numerous heads, internal or external 

 daughter bladders being present or absent. 



Type-species. — Multiceps multiceps (Leske, 1780a) Hall, 1910. 



KEY TO Sl'ECIES OF MULTICEPS. 



1. Mature segments wider than long ; the hiteral margins of each segment at 



times scalloped as a result of a number of constrictions or furrows pass- 

 ing around the segment transversely ; the posterior margin of each seg- 

 ment prolonged posteriorly to overlap the anterior margin of the suc- 

 ceeding segment like a cuff. Small hook with short, blunt curving handle. 

 Genital papilla very narrowly conical and near posterior margin of seg- 

 ment. Larva a coenurus with daughter bladders, found in the connective 



tissue of rodents MtdUceps serialis, p. 51. 



Mature segments longer than broad ; the lateral margins of each segment 

 smootli and not scalloped ; the posterior margin of each segment prolonged 

 very little or not at all to form a projection over the following segment. 

 Small hooks with long slender handle. Genital papilla posterior of middle 

 of segment but not near posterior margin. Larva a coenurus without 

 daughter bladders, found in ungulates, especially ruminants 2. 



2. Small hook with long curving handle terminating in a narrow distal ex- 



tremity. Large hook with tapering handle with sinuous outline. Testes 

 do not extend posterior of the ovaries to the vicinity of the vitellarium 

 or between the vitellarium and the ovaries. Larva a coenurus in the cen- 

 tral nervous system of ungulates, especially ruminants. 



Multiceps multiceps, p. 40. 

 Small hook with long straight handle terminating in a blunt distal ex- 

 tremity. Large hook with the handle not tapering, and either straight and 

 blunt or bent dorsally just at the tip. Testes extend posterior of ovaries al- 

 most to the vitellarium and between the vitellarium and the ovaries. 

 Larva a coenurus in the central nervous system, lungs, parenchymatous 

 organs and connective tissue of ruminants Multiceps gaigeri, p. 45. 



MULTICEPS MULTICEPS (Leske, 1780a) Hall, 1910. 



Synonyms. — Taenia multiceps Leske, 1780ay Vermis vesicularis 

 socialis Bloch, l780a/ Taenia vesicularis cer^ehrina Goeze, 1782a/ 

 Hydatigena cerebralis Batsch, 1786a/ Vesicaria socialis (Bloch, 

 1780a) Schrank, 1788a/ Taenia cerebralis (Batsch, 1786a) Gmelin, 

 1790a/ Polycephalus ovinus Zeder, 1803a/ Coenurus cerebralis 



