60 General Notes. [ January, 
while the Echini were most abundant in the Bajocian stage of thè 
Jurassic, the crinoids attained their maximum in the Oxfordian, 
After the Sequanian they suddenly diminish, and only one spe- 
cies occurs in the Portlandian. 
Quaternary.— At Ternefine near Maseara sr be teeth of two 
species of Elephas (E. atlanticus and E. melitensis) have been 
found, also Rhinocerus mauritanicus, a hippopotamus and Came- 
lus thomasi. The last is of about the size of the dromedary, but 
differs in the shape of the palate and jugal bones. With these 
were found a horse rather larger than the zebra, some antelopes, 
an ox, and a single bone of a swine. Roughly-shaped hatchets 
of limestone or coarse sandstone show the presence of man, but 
no remains of the domestic dog and no bones marked by the teeth 
of Carnivores were found. The presence of a large number of the 
cotyloid cavities of the pelvis of the elephant seem to indicate 
that they were used as utensils, and the numerous canines and 
incisors of the hippopotamus found were probably employed as 
weapons. 
MINERALOGY AND PETROGRAPHY.! 
AMERICAN MINERALS.—Quartz.—Vom Rath describes’ quite a 
number of complicated forms on the quartz crystals: from Alex- 
ander and Burke counties, N. C. The former have already been 
mentioned i in these notes. Among the rare forms on the latter 
are —H R 7, P, anda rough face to which the symbol oP may 
be referred. 
Stephanite—In the same article a stephanite crystal from Mex- 
ico, containing the new form 4} P 4} is described. 
Alaskaite of Konig,’ has bie, reéxamined by Th. Liweh, of 
Strassburg, who declares it to be tetrahedrite. He found it to 
crystallize in the hemihedral division of the regular system. 
In the November number of the Naruratist, fayalite was 
mentioned as having been found by Mr. J. P. Iddings i in the lith- 
ophyses of the obsidian and rhyolite from the Yellowstone Park. 
About the same time C. A. Tenne, of Berlin, found the same 
amai black crystals in the lithophyses of obsidians from the 
de aE Navajas, Mexico.. They were measured and pro- 
unced t the same mineral which G. seni as early as 
ay 6 had gece to be olivine. 
1 Edited by W. S. BAYLEY, Johns Hopkins Univ., Baltimore, M 
2 Mineralogische Mittheilungen. Zeitschrift fiir Be X, pp. 156 and 
475- 
3 May, 1885. 
4 Ueber die alaskaite, ein neues Glied aus der Reihe der wismuthsulfosalze. Zeit- 
PEF für Krystallographie, VI, p. 42. 
itsthrift der deutschen geol. Gesellschaft, 1885, p. 613. 
ipo der Physik. u. Chemie, 1827, Bd. x, pp. 323-332. 
