Trematodes and Cestodes 21 g-h 



Subfamily II FIMBRIARIINAE Wolffhiigel 1899 

 Genus Fimbriaria Frolich 1802 

 Fimbriaria intermedia Fuhrmann 1913 



Habitat. — Intestine of Somateria v-nigra Gray; Bernard harbour, North- 

 west Territories, June 27, 1916; C.A.E. Station 49r. 



This species has been well described by Fuhrmann (1913:446-52). A study 

 of the seven specimens and portions of specimens at hand brought out a few 

 differences of dimensions which seem worthy of note:. The largest specimen, 

 incomplete posteriorly, was 55 mm. in length (vs. Fuhrmann's 30 to 40 mm.) by 

 2-5 in width (vs. 1 to 1-5), its pseudoscolex, 2-3 by 1-5 mm.; the calcareous 

 corpuscles in the parenchyma gave maximum dimensions of 12 by 8^; a typical 

 longitudinal muscular fascicle near the median line was 21;u in dorsoventral 

 diameter by 9 in transverse; the cirrus-sac was on the average larger, namely, 

 0-34 mm. in length by 0-036 in diameter (vs. 0-2 by 0-03); both the external 

 seminal vesicle and the seminal receptacle were much enlarged with sperma- 

 tozoa, the latter so much so, in fact, that it was larger than the former — a 

 temporary condition no doubt; the ovary was from 0-8 to 0-9 mm. in width; 

 the vitelline gland was located a little closer to the antiporal border of the ovary 

 than to the poral margin and was 0-13 mm. in width by 0-11 in length; eggs 

 ellipsoidal in shape, 36 by 27^ in dimensions, embryos spherical, 22/^ in diameter. 



By placing the genus Fimbriaria in the family Hymenolepididae I am fol- 

 lowing the advice of Fuhrmann (1913:456) who has emphasized the many 

 characters common to the two groups and the impossibility of maintaining the 

 family Fimbriariidae. However, on account of its very aberrant structure it 

 must be separated considerably from the other genera of the family, hence the 

 use of Wolffhiigel's subfamily name Fimbriariinae. 



Family III TAENIIDAE Ludwig 1886 



Genus Taenia Linneus 1758 

 Taenia coenurus Ktichenmeister 1853 



To this species I refer a lot of ten isolated proglottides taken from the 

 foeces of one of the dogs of the expedition at ColUnson point, Alaskan arctic 

 coast, on September 23, 1913. Although they are past the gravid stage, each 

 containing only a few eggs, and the central reproductive glands and ducts are 

 all but completely degenerated, they agree so well with the description of the 

 species given by Deffke (1891) that there can be no doubt as to their identity. 

 They vary in length from 7 • to 8 • mm. and in maximum diameter from 2 to 

 2-8 mm.; the dimensions of the cirrus-sac are 0-32 by 0-08 mm.; there are 

 from 15 to 18 lateral uterine diverticula; and the eggs are nearly spherical and 

 from 30 to 37 m in maximum diameter. 



College of Medicine, 



University of Illinois. 



