6 
Specimens of Chaetoceras are very abundant in some of the Quill Lake gather- 
ings, though apparently wanting in others. They occur in both lakes and 
probably include more than one species. That described above closely resembles 
the form described and figured by C. S. Boyer under the name of Chaetoceras 
Elmorei, as found in the Devil’s Lake, North Dacotah:-—which, like the Quill 
Lakes, is saline—but others appear to differ. 
Excepting in the Devil’s Lake locality no species of the genus Chaetoceras 
has heretofore been found in any inland waters, unless it be those of the Caspian - 
Sea. It is also to be noticed, as bearing upon the theory of transportation by 
birds, that the species in question is wholly different from any other forms as 
yet observed upon either the Atlantic or Pacific sea boards of America or else- 
where. 
List oF DIATOMS FROM LITTLE AND BiG QuILL LAKEs, SASKATCHEWAN.* 
Amphiprora lepidoptera Greg. 85 (42:30:42) s20. 
Amphora commutata Grun. 56 (11) s10. 
es ovalis K. 33 (15) s13. 
i: salina W. Sm. 26 (6) ? 
Campylodiscus clypeus E. 210 (210) s1; 110 (110) s2 and 12. 
Chaetoceras Quillensis (nov. sp.) z16 (15); z18 (12); z4 (15). Setae 100 plus, 
crossing at joints making angles ol 
less than 60. Valval view 18 (10) 
13.(G)F 9} 46: 
Cymbella ehrenbergii K. 45 (10) s10. 
zs tumida Breb. 62 (5:15:5) s8. 
Cyclotella compta (E) K. 25 (9:7:9) s6 and 18. 
cp compta var. affinis Grun. 23 (63:10:63) s10. 
< Quillensis (n. sp.) 50 (50) s6; 75 (75) s6. 
Encyonema ? 26 (7) s16. 
Epithemia gibba K. 130 (5:8:5) s6; 90 (7:10:7) sé. 
Eunotia pectinalis var. undulata Ralfs. 82 (7) s10. 
Fragillaria virescens Ralfs. 32 (45/11) s18. 
Gomphonema capitatum E. 70 (7:10:20:15) s8. 
Mastogloia lanceolata Thew. 58 (3:11:38) sO. 
- Smithii Thew. 30 (10) s16. 
os var. lacustria Grun. 
Melosira granulata (E) Ralfs. z15 (12) s8; 29 (12) s12. 
ag distans K. z16 (40/5) s16. . 
Navicula acrospheria var. sandricensis A. S. 94 (13:9:16:9:13) s10. 
A ammophila Grun. (or mollis Sm.) 29 (7) s11. Doubtful 
Navicula anglica Ralfs. (Doubtful.) 35 (4:15:4) s13. 
‘ bacilliformis Grun. 38 (9:9 :9) s20. 
cs crucicula W. Sm. 48 (5:15:5) s17. 
a; cryptocephala K. 40 (3:10:83) s12. 
*For explanation of formulae see last page. 
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