1884.] Geology and Paleontology. 283 
longicostatum; Seeleya pusilla; Ricnodon copei; R. dispersus; R. 
trachylepis; Orthocosta microscopica. Microbrachide, Micro- 
brachis pelekani; M. mollis ; M. branchiophorus. These species are 
fully described and admirably illustrated. In the Hylonomide 
Dr. Fritsch includes the genera Hylonomus Daws., Smilerpeton 
Daw., Hyloplesium Fr., Seeleya Fr., and Orthocosta Fr. In the 
Microbrachide he is inclined to include, besides Microbrachis, 
the American genera Tuditanus and Cocytinus Cope. 
— 
FILHOL on Eocene Lemuroips.—Dr. Henri Filhol has pub- 
lished in the Annales des Sciences Geologiques a valuable illustrated 
paper on the two lemuroid genera Necrolemur Filh., and Adapis 
Cuv. His object is firstly to show that these genera are distinct 
from certain American genera ; and second, to describe the limb- 
bones and dental variations of the species of Adapis. As regards 
the first proposition it results from a statement by myself that 
the Necrolemur is identical with Anaptomorphus Cope, and the 
Notharctus Leidy, is identical with Adapis Cuv. Dr. Filhol 
shows that both these identifications are erroneous. The first 
correction I have already made in my forthcoming volume on the 
Tertiary Mammalia of the West, which has been in press about 
a year. ¿I do not remember that I had published this conclusion 
prior to my Paleontological Bulletin No. 37, p. 318 (January 2, 
1884), though it may be inferred from my language in the Pro- 
ceedings American Philosophical Society, 1881, p. 154. It is also 
expressed in the January, 1884, number of the AMERICAN NATU- 
RALIST, Dec. 29, 1883. Necrolemur has three premolars and 
Anaptomorphus has but two. As Dr. Filhol remarks, he has 
made no detailed description of the teeth in his account of Ne- 
crolemur in the Recherches sur les Phosphorites de Quercy, 
hence the difficulty I experienced in determining at first its den- 
tal formula, The differences in the detailed structure of the 
molar teeth of the two genera, now pointed out by Dr. Filhol, are 
mostly due to differences of wear. ` 
_Dr. Filhol has obtained the canine and incisive series of Ada- 
, and can show that they are of generally identical structure. 
“Us discovery furnishes the needful desideratum for the distinc- 
on of that genus from Notharctus. Hitherto no characters suffi- 
“lent to indicate a difference were known. 
Dr. Filhol gives a figure of a nearly complete skull of Adapis 
s. His figures of the limb bones of the same species 
Cope. that they greatly resemble those of Tomitherium.—Z. D. 
Tae MINERAL PRODUCTS OF THE UNITED STATES FOR 1882-3. 
ae impossible to state the total mineral product in any form 
shall not be open to just criticism. It is evident that the 
metallic statistics of such incongruous substances as iron ore, 
gold and silver; the spot value of coal mined, and the 
