1 54 The West American Scientist. 



6. Zygnema anomalum. 



7. Spirogyra quinina, Ag., near Short Creek, 8,200 feet; 

 West CHft. 



8. Spirogyra nitida, West Clift. 



9. Oscillaria froelichii, Kutz. 

 JO. " gracillima , Kg. 



11. Vaucheria geminata, Short Creek. 



12. " dichotoma, West Cliff. 



13. Nostoc sphoericum. 



14. " interruptum. 



15. Navicula viridis, Kutz, near Ula. 



16. " rhomboides, (Ehrenb), Greg, near Ula. 



17. " dactylus. West Cliff. 



18. Nitzschia amphioxys, Sm., near Ula. 



19. Epithemia turgida. Sm., near Ula. 



20. " gibba, Kutz, Short Creek, 8,20ofeet alt. 



21. Synedra ulna, Ehrenb., near Ula and Short Creek. 



22. Gomphonema acuminata, Ehrb. 



23. " dichotomum. 



24. Cocconeis pediculus, common, and also found in Pueblo Co. 



25. Fragilaria capucina, Sm., West Cliff and Short Creek. 



26. Diatoma (Odontidium) hiemale, Kutz., Short Creek. 



27. Closterium acerosum, Ehr., near Ula. 



28. " leibleinii, Kutz. . 



29. " cucumis, Short Creek. 



30. Cosmarium nitiduliim, DeNot. 



31. Euastrum ansatum, Ehr. 



IV. PTERIDOPHYTA. 



1. Botrychium lanceolatum. Angst., Willow Creek, 8,200 

 feet (M. E. Cusack.) A syrphid larva, about 10 mill, long, pale, 

 the dorsum dull orange, was found on this plant. 



2. Cryptogramme acrostichoides, 'Spreng.) R. Br., Porter 

 and Coulter, Fl., S. Colorado. 



3. Woodsia oregana, Eaton. Porter and Coulter, "Fl. Color- 

 ado. 



4. Pteris aquilina, Linn., somewhat local at about 8,400 feet 

 alt. 



5. Cystopteris fragilis, Bernh., Porter and Coulter, "Fl. Col- 

 orado." 



6. Equisetum pratense, Ehrh., West Cliff. 



7. Equisteum Icevigatum, Braun, Grape creek (Demetrio), 

 Ellis and Everhart. This species has priority over E. Iceviga- 

 tum, Lesqx, fossil at Golden. The fossil species may be amended 

 to E. perloevigatum, so as not to conflict with the recent one. 



8. Equisetum arvense L , Willow creek and elsewhere. Some 

 of the specimens are not typical. 



9. Equisetum hiemale, L., Willow creek and elsewhere, com- 

 mon. 



