NEW TAPEWORMS FROM CARNIVORES SKINKER 219 



Table 1. — Descriptive data on Taenia laticoUis Rudolphi, 1819 



Character 



Length.. 



Maximum width. 

 Neck 



Scolex (diameter) 



Rostellum (diameter) 



Suckers (diameter) 



Hooks (total number) 



Small hooks (length) 



Small hooks (distance from 



tip of handle to tip of 



guard). 

 Small hooks (distance from 



tip of guard to tip of blade) . 



Large hooks (length) 



Large hooks (distance from 



tip of handle to tip of 



guard). 

 Large hooks (distance from 



tip of guard to tip of blade) . 

 Genital papillae.. 



Hall's compilation (1919) 



50 to 95 mm. 



2 mm_ 



Absent 



1 to 1.22 mm.. 

 600m to 700;ii_-. 

 310^ to 400/1... 



38 to 60 



150 (?) to 183/.. 



Leuckart's descrip- 

 tion (1856) 



95 mm. 

 2 mm.. 



Absent. 



700/i. 



CO. 



About 250m ^- 

 128/. 



380 to 420/x. 



Longitudinal excretory 

 canals. 



Testes (number) 



Testes (diameter) 



Eggs 



Hosts (definitive). — 



Locality. 



Larva 



Drawings. 



Prominent. 



Lynx lynx (syn., Felis 

 lynx), L. canadensis, s 



Europeand(?)U.S 



Unknown... 



Small hooks, after Liihe 

 (1910). 



Slightly more than 

 128/.. 



About 390 2 



239/. 



Slightly more than 

 239/.. 



Mot observed. 

 The lynx 



Europe. 



Unknown 



Large hooks and 

 small hooks. 



Skinker 



Up to 140 mm. 



3.2 mm. 



Present or absent accord- 

 ing to state of contrac- 

 tion.! 



About 1.5 mm. 



About 714/.. 



About 390/1. 



38 to 42. 



214/1 to 238/.. 



122/1 to 134/.. 



134/1 to 140/1. 



390/1 to 415/1. 

 195/. to 244/1. 



146/1 to 177/1.2 



Only moderately promi- 

 nent. 

 Not prominent. 



About 180 to 250. 



37/. to 49/1. 



28/. to 32/. by 40/.. 



Lynx fasciatus, L. f. fas- 



ciatus, L. rufus, L. r. 



californicus. 

 North America (Wash, 



and Calif.) 

 Unknown. 

 Hooks, mature segment, 



gravid segment. 



1 Observations made by me on many specimens of cestodes indicate that the presence or absence of the 

 neck in any taenioid cestode is dependent upon the state of contraction of the strobila as a whole. In T. 

 taeniae for mis, a species described by most authors as being without a neck, I find a distinct neck in all 

 uncontracted specimens. 



' See discussion of measurement of hooks given in the general discussion of this species (p. 217). 



3 Hall (1919) included Lynx canadensis in the list of hosts of T. laticoUis. This record is undoubtedly 

 based on a record published by Stiles and Hassall (1894), but examination of this material by me reveal8 

 that the specimens, which were collected by Dr. A. I. Comfort, were incorrectly determined and are T. 

 macTocystis; no other information concerning them is available. Therefore Lynx canadensis cannot at pres- 

 ent be said to be known to serve as a host for T. laticoUis, although several other members of the genus Lynx 

 are known to serve as hosts, and it is therefore probable that L. canadensis will in time be found to harbcr 

 this cestode. 



