aaa 
1890.] American Invertebrate Paleontology. 135 
CAN NATURALIST, May number; Variations Exhibited by a Car- 
bonic Gasteropod, American Geologist for June; Note on the 
Distribution of Certain Löss Fossils, American Geologist, August, 
1889; Lower Carbonic Gastropoda from Burlington, Iowa, 
Proceedings Academy Natural Sciences, Philadelphia, for Sep- 
tember 24, 1889; the American Species of Polyphemopsis, ibid. ; 
Sphzrodoma; A Genus of Fossil Gastropods, ibid.; The Car- 
boniferous Echinodermata of the Mississippi Basin, American Jour- 
nal of Science, September number; and The Sub-generic Groups 
of Naticopsis, American Geologist for October. 
F. H. Knowlton describes a Problematic Organism from the 
Devonian at the Falls of the Ohio, in the American Journal of 
Science, March number. 
Joseph Leidy, in the Ann. Rept. Geol. Sur. Pa., for 1887, has a 
Notice of Fossils in Caves and Crevices of the Limestone Rocks 
of Pennsylvania ; chiefly vertebrates. 
J. P. Lesley publishes as Report (P. 4) of the Second Penn- 
sylvania Geological Survey, a Dictionary of the Fossils of Penn- 
sylvania and neighboring States. 
In the American Geologist for March Jules Marcou describes 
the Original Locality of Gryphea pitcheri. 
G. F. Mathew has: A Second Note on Stenotheca, in the Geo- 
logical Magazine, May number; On the Cambrian Organisms in 
Acadia, in the Canadian Record of Science for July; and On 
Remarkable Organisms of the Upper Silurian and Devonian of 
New Brunswick, in the Transactions of the Royal Society of 
Canada, Vol. VI. 
S. A. Miller has issued North American Geology and Paleon- 
tology, with a catalogue of the species described to date. 
Kentucky Fossil Shells from the Silurian and Devonian rocks _ 
are described by Henry Nettleroth in one of the monographs of 
the Ky. Geol. Survey. 
H. A. Nicholson discusses the Relations between the Genera 
css en Hinde, and Roemeria Ed. & H., and the Genus 
Schliiter, in the October number of the Geol. Mag. 
A. S Packard briefly notes some Recent Discoveries in the 
Carboniferous Flora and Fauna of Rhode Island, American Jour- 

