154 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Paleontology— Continued. 
Silurian — Continued. 
Petalocrinus mirabiiis, n. sp., Weller and 
Davison, 5978. 
Problematic fossil Medusae, Weller, 5983. 
Pteraspidian, Palseaspis (Claypole), Ameri- 
can, Claypole, 983. 
Rocks of Trenton age, Whiteaves, 6094. 
Sections of the formations along the northern 
end of the Helderberg plateau, Prosser, 
4499. 
Silurian-Devonian boundary in North Amer- 
ica, Williams, 6192. 
Silurian fauna interpreted on epicontinental 
basis, Weller, 5991. 
Silurian fossils from Nova Scotia, Ami, 88. 
Silurian plants, Grant, 2093a. 
Silurian strata in Wyoming and South Da- 
kota, Beecher, 372. 
Silurian strata of Maine, Upper, Dodge and 
Beecher, 1522. 
Siiurian vertebrate life at Canyon City, Wal- 
cott, 5788. 
Siluric fungi from western New York, Loomis, 
3570. 
Siluro-Devonic contact in Erie County, New 
York, Grabau, 2090. 
Sponges and coelenterates of lower Helder- 
berg, Girty, 2034. 
Sponges from the Quebec group, Dawson, 
J. W., 1437. 
Sponges, graptolites, and corals from the 
Lower Silurian of Minnesota, Winchell, 
N. H., and Schuchert, 6318. 
Stratigraphic geology of the eastern Helder- 
bergs, Prosser and Rowe, 4498. 
Structure and appendages of Trinucleus, 
Beecher, 367. 
Structure and systematic position of "Anom- 
aloides" and a proposal to change the name 
to Anomalospongia, Ulrich, 5536. 
Structure of Paleozoic barnacles, Clarke, 951 
Stratigraphic classification, Marcou, 3663. 
The St. Peter sandstone, James, 2890. 
Trenton fossils from Cumberland, Ont., Ami 
110b. 
Triarthrus beckii, antennae of, Matthew, W 
D., 3794. 
Trilobites, larval forms of, Beecher, 354. 
Trilobites of the Trenton limestone, Blake 
462. 
Upper Devonian and Niagaran crinoids, Mil 
ler and Gurley, 3997b. 
Upper Silurian in Iowa, Wilson, 6264. 
Utica terrane in Canada, Ami, 81. 
Variation of the nodes of a species of Encri 
nurus, Norton, 4121. 
Vertebrate fauna in Silurian strata, Walcott 
5780. 
Virginia, fossil in "Archean" of Piedmont, 
Darton, 1293. 
Zygospira reeurvirostra, Schuchert, 4837. 
Devonian. 
A Devonian Iehthyodorulite, Lindahl, 3513. 
Acervularia profunda Hall and Acervularia 
davidsoni Edwards and Haime, Calvin, 683. 
Actinophorus clarki Newberry, Claypole, 997. 
Paleontology— Continued. 
Devonian — Continued. 
Air-breathing animals of the Palezoic, Daw- 
son, J. W., 1446. 
Amphibian footprints, Marsh, 3699. 
Autodetus and paramorphic shells from the 
Devonian, Clarke, 942. 
Camden chert and its Lower Oriskany fauna, 
Safford and Schuchert, 4733. 
Chaetetes, occurrence of, Rominger, 4ti(i;;. 
Chonophyllum, monograph of, Sherzer, 4951. 
Circum-insular Paleozoic faunas, Weller, 5973. 
Cladodont sharks, Claypole, 986. 
Cladodonts of the Upper Devonian of Ohio, 
Claypole, 998. 
Cladodus? magnificus, Claypole, 993. 
Clymenia, discovery of, Clarke. J. M., 937. 
Coccostean-coccosteus, Cuyahogae, new, Clay- 
pole, 985. 
Composite -generic fundamenta, Clarke, 941. 
Contribution to our knowledge of the Clado- 
dont sharks, Claypole, 996. 
Corals, notes on fossil, Calvin, 687. 
Cordania on, Clarke, J. M., 938. 
Corniferous rocks of Ohio, Bownocker, 511. 
Correlation of Devonian faunas, Weller, 5982. 
Crinoids and brachiopodsfrom the Hamilton, 
Rowley, 4674. 
Crinoids, blastoids, and brachiopods, Rowley, 
4673. 
Crustaceans from Chemung group, Clarke, 959. 
Dentition of Devonian fishes, Eastman, 1608. 
Dentition of Devonian Ptyctodontidae, East- 
man, 1601. 
Devonian and Carboniferous faunas, Kindle, 
3173. 
Devonian and Carboniferous fossils from Yel- 
lowstone National Park, Girty, 2038. 
Devonian and Carboniferous outliers in Iowa, 
Norton, 4116. 
Devonian crinoids and blastoids, Weller, 5988. 
Devonian deposit in Illinois, Weller, 5997. 
Devonian fish fauna, Woodward, A. S., 6434, 
6435. 
Devonian fishes, Upper, Claypole, 989. 
Devonian fossils from southwestern Colorado, 
Girty, 2039. 
Devonian in southwestern Colorado, Spencer 
and Girty, 5111. 
Devonian in the southern Appalachians, 
Hayes, 4484. 
Devonian of eastern Pennsylvania and New 
York, Prosser, 4484. 
Devonian of north Missouri, Broadhead, 605. 
Devonian Palaeospondylus, Gill, 2023. 
Devonian placoderms of Ohio, Claypole, 999, 
1002. 
Devonian plants from New York and Penn- 
sylvania, Penhallow, 4333. 
Devonian rocks, Udden, 5509. 
Devonian rocks in California, Diller and 
Schuchert, 1501. 
Devonian series in Iowa, Norton, 4115. 
Devonian strata in Colorado, Spencer, 5118. 
Devonian system in Canada, Whiteaves, 6095. 
Dictyonine hexatinellid sponges, Clarke, 974. 
Dinichthys kepleri, Claypole, 1004. 
