=} 
Notice of Ehrenberg’s Memoir on Microscopic Life. 303 
the greater number appear sree with European forms. He 
then continues, thus— 
“ Besides these fossils, which occur directly under the surface of a 
péat-bog, and which cor itly belong most probably to recent spe- 
cies, I have also had an opportunity to examine a great number of not 
only recent but still living forms from West Point. Prof. Bailey sent 
me in the year 1842 some phials full of turf-water from West Point, 
containing mary living species of Bacillaria. These were filled with 
water at West Point on the 2d of April, 1842, and on the 16th of, June 
Iwas able to show many of them in a living state at Berlin. I have 
endeavored to compare all these living or decidedly recent American 
species with the European, and have consequently drawn figures of all 
of them. At the same time Prof. Bailey sent me a printed memoir, in 
which he describes some of the fossil infusoria of Virginia, and a con- 
siderable number of recent species from various places in the United 
States, and particularly from West Point. The following is a list of 
the species found at West Point, which Prof. Bailey has sh and 
figured in Parts I and II of his memoir on American Bacillari 
As this list furnishes the authentic names of the Mecies figur- 
ed in this memoir, we give it eon, believing that it. will be 
valuable for reference. = s 
I. Desmrpiacea. (See Part I of Bailey’s Bacillaria. NS . 
Fig. 1. Desmidium Swartzii ? <= — Swartzii. 
2,3. Euastrum ? = = em 
7 5 ? . — “ 
6. ec var. wii & ““ 
7. S..'  ee ae = Pentistosiagn radiata ? 
8. “  margaritiferum, | = Euastrum margaritiferum. 
9. ~ Dp. ‘ = Desmidium aculeatum. 
A. GL, Bp, = Xanthidium fasciculatum. 
ai. = Gl. Bp. = Arthrodesmus convergens. 
12. ~ Bk Wp. as uadricaudatus, p. 
13. tga @P- = — Kaiidnduain bisenarium. 
14, tel, Bp. — Desmidium glabrum. 
15. Xanthidium al. sp. = *Xanthidium arctiscon. 
16. ei ae = e: co mn, 
We A uN 7 = 3 ee i ae 7 ry 
8. 4 2 cutus, = si scuius. 
19. Micrasterias Tetras, — Micrasterias Tetras. 
ripe, or ee ae et 
* This list includ ioned in Parts I and II of Bailey’s Amer- 
can Bacillaria, Part i, Alok a the Echinelle, and various Spongiolites, Phy- 
bli, and Dictpoche, had not reached Ehrenberg when this list was made out. 
