158 



THE FUR SEALS OF THE PRIBILOF ISLANDS. 



contains very poorly preserved specimens, but the determination is evidently correct. 

 A bottle labeled '^Ascaris osculata, Phoca groenlandica" contains both A. osculata 

 (B. A, L, No. 2835) and A. decipiens (B. A. I., Fo. 2843). 



Specimens from Exjmbtopias Stellbri. — In the material brought to Wash- 

 ington by the seal commission are three bottles of worms taken from the stomachs of/ 

 three specimens of Uumetopias Stelleri. The worms were collected by Mr. Lucas in 

 August, 1896, on St. George Island, Bering Sea, and two of the lots represent very 



Fig. 88. 



Fig. 89. 



heavy infections. One lot (tag of seal commission 82) contained both Ascaris decipiens 

 (D.S.N.M.,No. 2822) and A. osculata (U.S.N.M., No. 2767), while the other two lots 

 (tag of seal commission 84=U.S.N.M., No. 2764, and tag 85=U.S.N.M., No. 2766) 

 apparently contained only Ascaris osculata. 



Our determination of these worms (figs. 84, 85) as Ascaris osculata is based upon 

 the following details : 



Intermediate lips present (iigs. 86, 87); lips with lateral 'projections; oesophageal 

 and intestinal caeca present; cuticular bands without finer striae; cuticular folds 

 back of lips (fig. 88). 



