NEW TAPEWORMS FROM CARNIVORES SKINKER 215 



Type specimen. — U.S.N.M. no. 39801, collected from Lynx rufus 

 in Alleghany County, Va., by Dr. E. W. Price, of the U. S. Bureau 

 of Animal Industry; paratypes (no. 28482) also collected by Dr. 

 Price. 



TAENIA TAXIDIENSIS, new species 

 Plate 19 Figures !)-12 ; Plate 21 



Specific diagnosis. — Type specimen about 10 cm long; maximum 

 width about 2 mm; about 150 segments (100 immature, 30 mature, 

 20 gravid). Neck relatively long; first segmentation apparent about 

 3 mm posterior to suckers; genital primordia visible in about twen- 

 tieth segment. Genital papillae usually in middle of lateral margin 

 of segment or slightly anterior to middle, sometimes quite promi- 

 nent and occupying one-fourth length of segment margin. Scolex 

 (pi. 19, fig. 12) only slightly wider than anterior portion of neck, 

 about 450/x, in greatest diameter; suckers prominent, cuplike, about 

 140/x, in diameter; rostellum about ITO/a in diameter. Hooks (pi. 19, 

 fig. 9) incompletely known; only one type (presumably large 

 hooks) present on available material; length of hooks 90/x to 93/a; 

 handle about 56/a long ; guard 44ju to 47ju, long ; width of guard about 

 16/x. Hooks appeared to be easily lost; the one hook found on the 

 type specimen was lost during the mounting process. Longitudinal 

 excretory canals inconspicuous, difficult to trace even in cross sec- 

 tions. Calcareous corpuscles round or ovoid, up to ISju, in greater 

 diameter. 



One complete ( ? ) specimen and several fragments comprise the 

 type and paratype material. 



Male reproductive system. — Testes 150 to 250 in number, in one 

 layer dorsoventrally, usually spherical, som.etimes ovoid, about 31,u 

 in greater diameter, with the usual distribution between longitudinal 

 canals. No testes observed posterior to vitellarium and none between 

 lobes of ovary. Coiled mass of vas deferens conspicuous, usually 

 curving somewhat toward posterior margin of segment in its course 

 toward median region of segment. Cirrus pouch extending mediad 

 to inner margin of ventral execretory vessel. 



Female reproductive system-. — Ovaries and vitellarium vary widely 

 in shape and size, as shown by camera lucida diagrams, all drawn to 

 same scale, in plate 21. Vitellarium relatively conspicuous, not ex- 

 tending laterally beyond ovary, usually close to posterior margin 

 of segment. Shell gland not demonstrable. Gravid uterus (pi. 19, 

 fig. 11) with 11 to 19 lateral branches on each side. Eggs not observed. 



Hosts. — Definitive : Taxidea taxus taxus; intermediate : Unknown. 



Location. — Intestine of definitive host. 



L)ist7ihution. — United States (Granite County, Mont.). 



Life history. — Unknown. 



