222 MARINE AND FISHERIES 



5 GEORGE v., A, 1915 



8. Polyphemus pediculus, Miill. 



Rather abundant in most of the samples. 



9. Leptodora hyalina, Lilljeb. 



Likewise rather common. 



COPEPODA 



10. Epischura lacustris, Forbes. 



Very abundant in all the samples. 



11. Diaptomus oregonensis, Lilljeb. 



Likewise abundant in most of the samples. 



12. Diaptomus minutus, Lilljeb. 



Together with the preceding species, but less abundant. 



13. Cyclops brevispinosus, Herrick. 



This form is closely related to C. robustus, G. O. Sars, and is perhaps the 

 same species. 



Only a few specimens observed, apparently dredged from theiaottom. 



14. Cyclops thomasi, Foibes. 



This form has been identified by Dr. Schmeil and some other authors with 

 C. pulchellus, Koch ( = C. bicuspidatus, Glaus). It is however, as I have con- 

 vinced myself, a well-defined species. 



Not infrequent in some of the samples. 



15. Cyclops edax, Forbes. 



Nor in the case of this species has its validity been admitted by Dr. Schmeil, 

 who regards it as only a variety of C. leuckarti, Glaus, I find it, however, to 

 be quite certainly specifically distinct though nearly allied to that species. 

 Gommon in most of the samples. 



OSTRAGODA. 



16. Cyclocypris serena, Koch. 



Occasionally from the bottom. 



