250 
W. E. WADE 
the omission of desmids from the syslematic section was neces- 
sitated by limitations of space for such a great number of species 
of this grouj). 
Despite these numeroiis articles, there are still counties of the 
State from which desmid distributional records are few in number 
or complelely lacking. AIso, there lias beeii no coinpreheiisive 
atteinpt (except for Nichols and Ackley) to déterminé the distribu¬ 
tion of this group in relation to the major jihysiographic and soil 
types of the state. 
The purpose of this présent paper is to report two hundred and 
eight (208) new records for the state (of which 13 are iiew to 
science), whereas a later paper will deal exclusively with the 
ecology and distribution of desmids in the state. 
The writer wishes to thank D' G. W. Prescott for his valuable 
guidance and for the use of his extensive iconograph. Species 
lhanks are aiso extended to D' M. L. Britton of Northwestern 
University and to Mr. Lee Franuam for the use of collections from 
Berrien and Barry counties respectively. The writer aiso wishes to 
acknowledge the help of D' Hannah Croasdale in preparing the 
Latin diagnoses. 
Family Mesotaeniac;eae 
Mesotaeniuin Naeg. 
Mesotaeninm endlicherianiwi Naeg. Berrien County. 
CijUndrocyslis Menegh. 
Cylindrocijsiis crassa De Bary. Schoolcraft County. 
Roya (West and West) Hodgetts. 
Roya cambrica West and West fa. Specimens from Gogebic County 
agréé well with the typical, altliough they are only about one- 
half the size (about 20 times longer than wide) with more 
truncate apices. 
Length 91.5 p.; width 4.3 ]l. 
Family Desmidiaceae 
Closterium Nitzsch. 
Closferinm acutum var. variable (Lemm.) Krieger. Barry County. 
C. baillyanum var. alpinum (Viret) Grônbl. Specimens from 
Schoolcraft County are relatively longer than the typical and the 
variety but agréé more favorably with the latter in cell curva- 
ture and in the proportionalely narrower and longer cells. 
Source MNHN.Pans, 
