120 J. M. Clarke—New Devonian Crustacea. 
Arr. XII.—New Discoverres in Devonian Crustacea; by JOHN 
M. CLARKE. 
In continuation of the notice of some new Devonian Crustacea 
with a few remarks on their affinities and distribution. The 
Portage shales, in the town of Naples, Ontario Co., N. Y., but 
at the time of description were confined, as far as my knowledge 
ing distribution : 
. In the “ Lower Black Band” of the Portage. 50 feet above 
the “ Transition shales,” Bristol, Ontario Co. 
2. About 150 feet above the “ Transition shales,” in the town 
of Naples. 
. Approximately the same horizon in the town of Rich- 
mond, Ontario Co. 
4. In the “Upper Black Band” of the Portage, 540 feet 
above the “T'ransition shales,” Naples. 
5. In approximately the same horizon, in the ‘‘ Upper Black 
Band,” 14 miles south of the Shaker Settlement, along Casha- 
qua Creek, Livingston Co. 
6. In approximately the same horizon in a cut on the Dela- 
ware, Lackawanna & Western R. R., in the town of Sparta, 
Livingston 
7. In the shales immediately overlying 4. 
8. In the Upper Portage sandstones, Portageville, Wyoming 
Count ; 
* The term “ Transition shales” is applied without liability to misinterpretation 
to passage beds of slightly arenaceous shales lying between the highest horizon 
of the fossils belonging distinctively to the Genesee, and the lowest stratum of 
undoubted Portage age. 
have a wide distribution in the counties of Ontario, Yates, Livingston, 20! 
believe’them to be well defined on the Genesee River at Mt. Morris, They coR- 
tain ich i i z 
tus H., of the Hamilton and Portage, Styliola fissureila H. abundant from the base 
of the Hamilton to the base of the Chemung proper, and a Pleurotomaria of uD- 
described species, abundant in the Portage. 
