668 The American Naturalist. [August, 
Summing up the principal changes which have occured in the evolu- 
tion of Anoplotherium from Dacrytherium, I emphasize the following : 
1. Increase in height of the crowns of the upper molars, and the redu- 
plication of the metaconid of the lower molars, this division of the meta- 
conid is found in an incipient condition in young jaws of Dacrytherium. 
Complete separation of the metaconid into two distinct cusps only 
occurs in some forms of Anoplotherium. 2. The hind foot of Daery- 
therium is normal in structure, and has at least four toes, this is the 
primitive type of pes, from which the specialized fost of Anoplotherium 
has been derived. 
Note.—In my “Notes on the Fossil Mammalia of Europe,” part 
II, American NATURALIST, April, 1896, I find two mistakes, which 
should be corrected. On page 309, third and fifth lines from top, read 
Adriotherium, instead of Adiotherium as printed, and also page 310, 
eighth line from the bottom, read Anoplotheriide, in place of Suillines. 
— CHARLES EARLE.. 
BOTANY:.' 
De Toni’s Sylloge Algarum.—Dr. De Toni’ has recently issued 
the third volume of his Sylloge Algarum. It deals entirely with the 
Brown Algæ or Phaeophycee—the FucotpE® as he calls them. A 
thousand species are described under one hundred and eighty genera, 
which are grouped into twenty-nine families. He divides the group into 
three orders, Cyclosporine, (Fucacex) Tetrasporine (Dictyoter) Phæo- 
zoosporine (Phsevzoosporez ). 
Splanchnidium rugosum the interesting plant which after careful 
study was placed by M. O. Mitchell and F. G. Whiting’ in the Phæo- 
sporin, is retained in the Durvilleacee, the fruit being described as a 
polysporous oogone. The general appearance of the plant and the 
structure of the conceptacles suggest a close relationship with the 
fucoids, but if the above investigations are to be accepted the plant 
1 Edited by Prof. C. E. Bessey, University of Nebraska, Lincoln, Nebraska. 
2 Sylloge Algarum Omnium Hucusque cognitarum by J. Bapt. De Toni, Vol. III, 
—. 
hnidi im Grey. the type of a new order of Algæ, Phycolog- 
ical Memoirs, BLE 1892, 
