weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, L901. 17 
iTBayley (W. S.). [Review of "Elements of mineralogy, crystal 
lographyand blowpipe analysis," by A. J. Moses and C. L. 
Parsons]. 
Am. Nat., vol. 35, pp. 239-240, L901. 
4s Beard (J. Carter). Three characteristic types of American dino- 
saurs. 
Sci. Am., vol. 84, pp. 184-185, fig. 1, 1901. 
49 Something about ancient American saurians. 
Sci. Am., vol. 85, p. 267, 1 fig., 1901. 
Describes their general characteristics. 
50 Becker (George F.). Report on the geology of the Philippine 
Islands, followed by a version of " Ueber Tertiare fossilien 
von den Philippinen" (1895), by K. Martin. 
U. S. Geol. Surv., 21st Ann. Kept., Part III, pp. 493-625, pis. lxvi- 
lxviii, figs. 103-104, 1901. 
Abstract: Am. Geol., vol. 28, pp. 126-127, 1901. 
Describes the character of the igneous rocks and the mineral resources 
of the islands. Includes a bibliography and a translation of a paper by 
K. Martin on the Tertiary fossils of the Philippines. 
51 Beecher (Charles Emerson). Studies in evolution; mainly reprints 
of occasional papers selected from the publications of the 
laboratory of invertebrate paleontology, Peabody Museum, 
Yale University. 
Yale Bicentennial Publications, 638 pp., pis. i-xxxiv, figs. L— 132, 
1901. Charles Scribner's Sons, New York. 
Contains discussions on the origin and significance of spines, structure 
and development of trilobites, studies in the development of the Bra- 
chiopoda, development of a Paleozoic poriferous coral, symmetrical 
cell development in the Favositidse, and development of the shell in 
the genus Tornoceras Hyatt. 
52 Note on the Cambrian fossils of St. Francois County, Missouri. 
Am. Jour. Sci., 4th ser., vol. 12, pp. 362-363, 1901. 
Abstract: Geol. Mag., new ser., dec. 4, vol. 8, pp. 559-561, L901. 
Discusses the fossil evidence indicating that a considerable thickness 
of the rocks of this region are to be referred to the Cambrian. 
58 Discovery of eurypterid remains in the Cambrian of Missouri. 
Am. Jour. Sci., 4th ser., vol. 12, pp. 364-366, pi. vii, L901. 
Abstract: Geol. Mag., dec. 1, vol. 8, pp. 561-564, 1901. 
Describes Sirabop* thatcheri n. gen. el sp. 
54 [Review of "A treatise on zoology," 1>\ F. A. Bather, etc.] 
Science, new ser., vol. 14, pp. 844-845, L901. 
55 Beede (J. W.). Fauna of the Permian of the central United 
States. Part I. 
Kans. Acad. Sci., Trans, vol. 17, pp. Is:. L89, pi. xiii-xiv, L901. 
Describes several n< w species. 
9251— No. 203—02 2 
