1896. 65 
470 Marsh (Otbniel 0.). A new belodent reptile (Stegomus) from the 
Connecticut River sandstone. 
Am. Jour. Sci., 4th ser., vol. ii, pp. 59-62, pi. 1, figs. 1-3. 1896. 
Describes and figures a new species of Belodontia i'rom the Connecti- 
cut River sandstone at New Haven, Conn., and discusses its relations to 
other reptilian forms of this horizon. 
470 _ The geology of Block Island [Rhode Island]. 
Am. Jour. Sci., 4th ser., vol. ii, pp. 295-298 and 375-377, 1896. 
Compares the clay beds of Block Island with those of the Potomac 
formation of Maryland and the Raritan clays of New Jersey. Discusses 
the origin of the clays, considers the clays of Marthas Vineyard are 
Jurassic and resemble the Block Island clays. In the second paper 
reviews the literature of the subject. 
478 Amphibian footprints from the Devonian. 
Am. Jour. Sci., 4th ser., vol. ii, pp. 374-375, 1896. 
Describes a footprint from upper Devonian strata of Pennsylvania. 
479 The Jurassic formation on the Atlantic Coast. 
Am. Jour. Sci., 4th ser., vol. ii, pp. 433-447, 1896. 
Describes the Baptanodon and Atlantosaurus beds of the West, and 
gives a general section showing the lithologic character and the horizons 
of vertebrate fossils of the Cenozoic and Mesozoic series. Describes the 
Pleuroceelus beds and the Potomac formation. Discusses the relative 
importance of fossils, the age of the Wealden and the Laramie, and the 
position and character of the Jurassic, and reviews the work of early 
investigators. 
480 The dinosaurs of North America. 
U. S. Geol. Surv., 16th Ann. Rept., Pt. I, pp. 143-244, pis. ii-lxxxv, 
figs. 1-66, 1896. 
Describes the characters of the Jurasic and Triassic dinosaurs and dis- 
cusses their affinities and classification. 
481 Vertebrate fossils [Denver Basin, Colorado]. 
U. S. Geol. Surv., Mon. xxvii, pp. 473-527, pis. xxi-xxxi, figs. 23-102, 
1896. 
Gives a brief account of the succession and distribution of the Juras- 
sic, Cretaceous, and Tertiary beds, and the description of the vertebrata 
collected. 
482 The Jurassic formation on the Atlantic coast. 
Abstract: Science, new ser., vol. iv, pp. 805-816, 1896. 
Gives a table of the geologic horizons of vertebrate fossils of the Meso- 
zoic and Cenozoic eras and discusses the evidences of the Jurassic age 
of the Potomac beds. 
483 Restoration of some European dinosaurs, with suggestions as 
to their place among the Reptilia. 
Abstract: Geol. Mag., dec. 4, vol. iii, pp. 1-9, pis. i-iv, 1896. 
Noticed in Bibliography and Index for 1895. 
484 Classification of dinosaurs. 
Geol. Mag., dec. 4, vol. iii, pp. 388-400, 1896. 
Noticed in Bibliography and Index for 1895. 
Bull. 149 5 
