262 Tin A iin rial a Geologist. October, 1893 
sponge being preserved in so ancient and so greatly modified a quartz- 
ite, is necessary to impugn Matthews's determination, for it is a fact that 
minute hypodermal pentacts are known to occur in at least one of the 
lower Carboniferous (Keokuk group) hexactinellide, having not more 
than one-half the diameter of those assigned by Matthew to his C. 
eozoiea, and associated in the same skeleton with tetracts or pentacts 
20,000 times as large. 
On the Development of the Shell of Zygospira recurvirostra. By- 
Charles Schuchert. (Proc. Biological Society of Washington, vol. 
viii, pp. 79-82, pi. xi, 1893). 
A brief account of the developmental phases of this brachiopod, fol- 
lowed by observations indicating the lines of phyletic departure within 
the limits of the genus. An interesting structural feature is found in the 
youngest specimen observed, viz: a concave plate in the apical portion 
of the pedicle valve, "continuous with the wall of the delthyrium, but 
apparently not attached to the rostral cavity.'' The author suggests 
that this peculiar structure coexisting with a brachiopod possessing at 
maturity deltidial plates, may indicate that the spondylium-bearing 
brachiopods, like the genera Protorthis and Clitambonites or their 
ancestors, are the parent stock of genera possessing deltidial plates 
but without the spondylium. 
A Classed and Annotated Bibliography of the Pahvozoic Crustacex 
1698-1892; to which is added a Catalogue of North American Species. 
By Anthony W. Vogdes. San Francisco, June, 1893. 
This work appears as one of the "Occasional Papers'' of the Califor- 
nia Academy of Sciences and covers 412 pages. It is the second edi- 
tion of Capt. Vogdes' Catalogue, first issued as Bulletin No. 63, U. S. 
Geological Survey, 1890. The new edition is greatly improved in many 
respects; it is much larger than the first, all supplements and addenda 
having been incorporated, and it is vastly superior in typography, paper 
and press work. Indeed, it is in all points a most creditable work, and 
even though it still shows need of more careful proof-reading, and some 
important papers are conspicuous by their absence, yet the author is 
entitled to lay to his soul the nattering unction that he has produced 
the very best bibliography and catalogue extant of any group of fossils, 
a credit to his patient industry and to the academy which has sup- 
ported him. He deserves, and has already received, the appreciative 
thanks of workers in this department everywhere. 
The Geology of Carmelo Bay. Andrew C. Lawson and Juan de la C. 
Posada. Bulletin of the Department of Geology, Univ. of Cal., vol. i, 
pp. 1-50, 1893. Berkeley. Price, 25 cents. 
In this tract we have an investigation carried on by Dr. Lawson and 
one of his geological students into the structure of the country around 
Carmelo bay. Going to the spot to see an intrusion of granite into 
Mesozoic strata and an exhibition of metamorphic rocks, both of which 
were reported in the "Geology of California," the author was surprised 
