14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 81 



field. The uterus consists of masses of coils filling the central part 

 of body from the ovary to the acetabulum. The vagina is about 

 one-half the length of the cirrus pouch. Eggs oval, 68/a to 79ja long 

 by 43/A to 52ju wide, thickened at posterior pole and circular in 

 cross section. 

 Host. — Zalophus calif ornianus. 

 Location. — Bile ducts. 



Distribution. — North America — United States (New York Aqua- 

 rium and National Zoological Park, Washington, D, C). 



Remarks. — The foregoing description is slightly modified from 

 that given by Stunkard and Alvey (1930). 



Four specimens (U.S.N.M. Helm. Coll. No. 29731) of what ap- 

 pear to be this species were collected, March 17, 1930, from the 

 liver of a specimen of Zalophus calif ornianus^ which died in the 

 National Zoological Park, Washington, D. C. These specimens 

 agree in all essential characters with the description given by Stunk- 

 ard and Alvey except as regards the branching of the anterior ceca 

 and in the length of the cirrus pouch. As regards the anterior ceca, 

 Stunkard and Alvey state that " each of the anterior branches gives 

 oif two or three diverticula," but in the specimens at the writer's dis- 

 posal no such diverticula were found. Two of the specimens showed 

 a slight irregularity in the diameter of these ceca, but this appeared 

 to be due to distention with ingesta. The cirrus pouch is described 

 by Stunkard and Alvey as extending caudally to the level of the 

 ovary, but in the writer's specimens this structure was found to 

 extend to about midway between the posterior margin of the acetab- 

 ulum and the anterior margin of the ovary. These differences, 

 however, appear too slight to warrant considering the possibility of 

 the writer's specimens representing a species distinct from Z. 

 hepaticvmi. 



Genus ORTHOSPLANCHNUS Odlmer, 1905 



Generic diagnosis. — Campulinae : Body elongated and slightly 

 flattened; cuticle covered with pointed spines. Intestinal ceca with- 

 out lateral or median diverticula. Genital pore preacetabular ; cirrus 

 pouch long and pestle shaped, extending beyond posterior margin 

 of acetabulum; cirrus armed with strong pointed spines. Testes 

 with indented margins, postequatorial and tandem in position. 

 Ovary without lobes ; seminal receptacle very small ; Laurer's canal 

 present. Vitellaria profusely developed, the follicles being dis- 

 tributed both dorsally and ventrally from region of pharjaix to pos- 

 terior end of body. Uterus with few coils; vagina well developed 

 and lined with strong pointed spines. Eggs triangular in cross 

 section. Parasites of pinnipeds. 



Type species. — Ortliosplaivchnus arcticus Odhner, 1905. 



