264 Scientific Intelligence. 
extinct animals (elephants) at two localities: near La Noria, northeast of 
Mazatlan, and in the Arroya de la Palma, two leagues east of La Casita, 
in Sono 
- Shsets of Liem lavas, somewhat similar to those of California, and 
probably of the same age, forming with tufas the upper — series, 
orerlio the other fobabane occupying a nearly horizontal positi 
e most recent formation is that of the terrace deposits of ane and 
oo which occur in Sonora.” 
The pamphlet, after giving details on these several formations, closes 
with a list of the principal mines of northern Mexico, in which the ores 
they yield are mentioned, the dip and strike of the veins, and other par- 
— of interest. 
n Fucoids in the Coal Formation; by Leo Lesquereux. 14 pp. 
i with a plate. From the Trans. Am. ’Phil. Soc., xiii, 313.—After re- 
; 
on Slippery Rock Creek, opposite Wurtemberg, Lawrence Co., Pennsyl- 
vania. The specimens were from the lower surface of a thin layer of 
Fucoids, resembling sig i, mcs Seats Hall; micaceous sandstone, 
with a few remains of Paleeophycu 
The frond, in the new species, is somewhat lyre-shape in outline, but 
varies much. It is 2 in. to 1 ft. in length, and half this in breadth. 
has a fleshy margin from an eighth to a fourth of an inch thick; and it 
is crossed by curving ribs, which — from the inner to the outer edge, 
a concentric with the lower mar 
8 species is referred by Euscadend to Sternberg’s genus Caulerpiles, 
and nated C. marginatus, It resembles somewhat Fucoides Cauda- 
“ed = the Devonian,—Hall’s Spirophyton—which Lesquereux refers to 
the same genus. It has nothing of the spiral character of the F. Cauda- 
Galli, on which Hall bases his name Spirophyton. Lesquereux considers 
this character not of generic value, and due only to a twisting © f the 
frond as it Lin peculiarity observed in some living Fuci. 
Lesquere ux closes his memoir with a statement of some strong reasons 
ee tio of mar that ssckvoliis has been derived mainly from the decompo- 
marine plants. 
3. On the oldest known British Crab (Protocarcinus longipes Bell, 
a. ) from the poaeie Marble of Malmesbury, Wilts ; by Hz enry Woop- 
living on our om coasts. — Proc, y Book: Sie, Reader, Jona 2. 
