The following additional species is not uncommon: 



Cladosporium typharum Desm., on dead or old leaves of Typha. 



Diatomacece. — A more complete record of the diatoms of this region will 

 be published later. They have heretofore received scant attention. Buchanan 

 reported the following species: is 



Melosira granulata, Lake Okoboji and Gar lake. 



Stephanodiscus niagarge Ehr., Gar lake, 



Tabellaria fenestrata (Lyngb.) Kutz., Gar lake. 



Myers had previously given a general report is on the diatoms of this 

 region, and referred to the genera Cocconema, Gomplionema, FragiUaria, 

 Synedra, Odontidium, and Stictodiscus. 



Algce. — ' In the Proceedings of the Iowa Academy of Sciences, vol. IV, 

 1897, the writer reported a list of Okoboji algte, identified by Miss Cavanagh, 

 containing the following species: 



Chaetophora piciformis (Eoth) Ag. 



Cladophora glomerata Kg. 



Cladophora fracta Kg. 



Cladophora fracta gossypina Kg. 



The writer has since added Hydrodictyon utriculatum, and a number of 

 other species not yet identified. 



Buchanan (loc. cit.) reports the following: is 

 Coelosphgerium Keutzingianum Naeg., South G^r lake. 

 Microcystis (Clathrocystis) a5ruginosa Kuetz, E. Okoboji lake. 

 Anabaena circinalis Eaben., E. Okoboji lake. 

 Gloeotrichia (Eivularia) pisum Thur., Gar lakes. 

 Q^^dogonium Franklinianum Wittr., Gar lake. 

 Penium closteroides Ealfs., E. Okoboji lake. 

 Cosmarium undulatum Corda, N. Gar lake. 

 Volvos globator (L.) Ehrenb., Lower Gar lake. 



Subkingdom II. — BEYOPHYTA 



The following representatives of this group were formerly quite common, 

 but have become rare : 



Hypnum fluitans L. In ponds. 

 Eicciocarpa natans (L.) Corda. Ponds. 

 Eiccia fluitans L. E. Okoboji lake. 



The Pteridopliyta are also represented by but one species, and the Sperma- 

 topliyta again form the conspicuous feature of this flora. Frequently the 

 latter form greater or lesser beds which are more or less widely separated, 

 with a few or no specimens scattered between them. These plants are thus 

 often found in but few localities, but may there be very abundant. 



In the appended list of vascular plants the following symbols are em- 

 ployed : 



1. — ■ The Eoman numerals at the heads of the columns mark groups of 

 localities as follows: 



I. — Miller 's Bay and Emerson 's Bay. 



13 See Bibliography. 



42 



