FISHERY BULLETIN: VOL. 71, NO. 2 



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a sperm whale, PJiyneter catodon L; 

 and Z. luhimotvi Petrov and Chert- 

 kova, 1963, from the liver of a southern 

 sea lion, Otaria bijronia (Blainville, 

 1820) at the Moscow Zoo. Zalophotremo 

 pacificum sp. n. can be easily separated 

 from the three previously described 

 species. Z. hihimoici differs from all 

 other species in the genus in that it 

 does not have confluent vitellarian fields 

 anteriorly. Z. curileiish differs from 

 Z. pacificum by larger body size (18- 

 22.5 mm long by 5-7 mm wide) as 

 well as the acetabulum being larger 

 than the oral sucker. Z. pacificum sp. n. 

 is most similar to Z. hepaticum in 

 general body shape but differs in the 

 following characteristics: body width 

 (Z. hepaticum 3.0-3.6 mm wide), sucker 

 ratio (in Z. hepaticum oral sucker almost 

 twice as large as acetabulum while in 

 Z. pacificum sp. n. suckers are approxi- 

 mately same size), ratio of distance be- 

 tween suckers to body length {Z. hepati- 

 cum 1:13, Z. pacificum sp. n. 1:2.5), 

 distribution (percentage) of preacetabu- 

 lar vitellaria {Z. hepaticum nearly twice 

 as large as those of Z. pacificum sp. n.), 

 and egg size (75 jjl long by 50 [jl wide 

 in Z. hepaticum). 



CiinipnLi rochehrntii (Poirier, 1886) 

 Bittner et Sprehn, 1928 



This parasite was recovered from the stom- 

 achs and hepatopancreatic ducts of three (two 

 S. (jraffma)ii and one S. lougirostris) of 78 

 (3.9% ) animals examined. This is a new host 

 record for this parasite and represents the 

 first report from the genus Stoiella. C. roche- 

 by^u)ti was originally described from Delphinus 

 dclphis L. in European waters. 



Incidental Trematodes 



Three specimens of the genus Hirudiuella 



Figures 9-10. — Zalophoircina paiificuni sp. n. 9. Entire 

 worm, ventral view; 10. egg. Abbreviations used: 

 a - acetabulum; gp - genital pore; o - ovary; os - oral 

 sucker; p - pharynx; t - testis; u - uterus. 



462 



