
822 The American Naturalist. [September, 
force which transported the material to its present resting-place was the 
storm action of waves. (Trans. Can, Inst., March, 1891.) The 
most interesting fact developed in the recent surveys of the Pacific 
coast is that the coast-line of Southern California is more abrupt than 
that of any part of the Atlantic or other portion of the Pacific. (Scien. 
Am., July 25th, 1891.) 

Archean.—Professors Solas and Cole call attention to the streaki- 
ness which characterizes the interlamination of an olivine and coral 
sand-rock, and note its resemblance to eozonal and serpentinous lime- 
stone. (Proceed. Roy. Dublin Soc., 1891, p. 124.) 
Paleozoic.—Sir William Dawson has described a new fossil plant, 
Lepidodendron murrayanum, from the Carboniferous rocks of Newfound- 
land.. The specimen shows the character of the old stem, branches, 
and leaves. (Bull. Geol. Soc. Am., Vol. IL, p. 532). ev. 
Herzer has found in the Upper Helderberg limestone, near Sandusky, 
Ohio, a fossil fragment of an Alga, which has been described by Prof. 
Lesquereux under the name, Halymenites herzerit. The specimen is 
remarkable, and of great value, from the fact that its internal structure 
is so well preserved that its characters are clearly discernible. One or 
two specimens only of that kind are recorded by paleobotanists 
(Proceeds Nat. Mus., Vol. XIII.) Mr. H. M. Ami has contributed 
a paper to the Canadian Record of Science, April, 1891, in which he 
says that it is perhaps premature to state the precise geological hori- 
zon of the strata at Quebec city, but in his opinion they occupy a 
position in the Ordovician system higher than the Lewis formation, 
but lower than the Trenton, and are probably an upward extension of 
Sir William Logan’s ‘Quebec Group.” This would make them 
about equivalent to the Chazy formation of the New York and Ontario 
_ divisions. 


Mesozoic.—M. Kilian and M. Leenhardt have decided that from 
a stratigraphical standpoint the sands of the valley of the Apt, in 
Southeastern France, are Cretacic, and not Tertiary, as has been thought. 
(Bull. No. 16, Tome II., de la Carte Geol. de la France.) Mr. A. J. 
Jukes-Brown and Rev. W. R. Andrews have ascertained, by means of 
a well sunk at Dinton, Eng., that there is a well-developed Upper 
Purbeck series in the vale of Wardour, with a thickness of 70 or 80 
feet, and this is succeeded by representatives of the Wealden and Vec- 
tian series, which, however, are poorly developed, and taken together 
are less than 100 feet. (Geol. Mag., July, 1891.)———Mt, Diablo is an 
isolated peak of the Coast Ranges of California, lying about 27 miles 



