of Microscopical Organisms. 1351 



Ilab. Honcylake Valley. Foot of Sierra Nevada. 



Fig. G. Cymbella gibba, Bail., nov. sp. Small ; 

 valves with very convex, almost conical dorsum ; venter 

 slightly convex ; strias fine and close. 



Hab. Honcylake Valley. 



I know nothing of the character of this locality, other- 

 wise than by the species it contains. Cymbella gibba, B., 

 is its most characteristic and abundant form. 



As most of the preceding forms were discovered so long 

 ago as 1854, it is highly probable that some, if not many 

 of the forms here described as new, may have been seen 

 and named by other writers. I have carefully searched all 

 the books at my disposal, in order to avoid such multipli- 

 cation of synonymes, but have found only one species, the 

 Syringidium Americanum, B., which has as yet been pub- 

 lished by other authors. I would also here say that any 

 errors of description in the preceding remarks may be as- 

 signed to my observation, rather than to that of their first 

 observer, although I have confined myself mostly to veri- 

 fying his results, and have added nothing myself, of which 

 I have not felt entirely sure^ INIy thanks are due to INIr. 

 Charles Stodder, of Boston, for many valuable sugges- 

 tions. 



In conclusion I would say, that a large amount of mi- 

 croscopic and botanical matter, which was in course of 

 preparation for publication, still remains among the Mem- 

 oranda of Prof. Bailey's Microscopic Collection, which I 

 will endeavor to collect and complete at an early day. 



Note. — I take the opportunity afforded by a delay in 

 publication to correct an error, which has crept into the 

 preceding remarks, through a typographical error in Smith's 

 Synopsis. 



