weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1901. 73 
646 Rickard (Forbes). Notes on Nome, and the outlook for vein min- 
ing in that district [Alaska]. 
Eng. and Mg. Jour., vol. 71, pp. 275-276, 1 fig., 1901. 
Contains notes on the geology of the region and the occurrence of gold. 
647 Rickard (T. A.). The Cripple Creek volcano [Colorado]. 
Am. Inst. Mg. Engrs., Trans., vol. 30, pp. 367-403, figs. 1-2, 1901. 
Gives an account of the various stages of eruption in this volcano and 
compares it with volcanos in other regions. 
648 — — The telluride ores of Cripple Creek [Colorado] and Kalgoorlie 
[Australia]. 
Am. Inst. Mg. Engrs., Trans., vol. 30, pp. 708-718, 1901. 
Describes the characteristics of the ores of these regions. 
649 Ries (Heinrich). Theodore Greely White. 
Am. Geol., vol. 28, pp. 269-270, with portrait, 1901. 
Gives a brief sketch of his life and work, and a list of publications. 
650 Riggs (Elmer S.). The Dinosaur beds of the Grand River valle} T 
of Colorado. 
Field Col. Mus., Geol. ser., vol. 1, pp. 267-274, pis. 34-39, 1901. 
Describes the general character of the Cretaceous, Jurassic, and Triassic 
strata and the occurrence of vertebrate remains. 
651 The fore leg and pectoral girdle of Morosaurus. With a note 
on the genus Camarosaurus. 
Field Col. Mus., Geol. ser., vol. 1, pp. 275-281, pis. 40-42, 1901. 
652 The largest known dinosaur. 
Science, new ser., vol. 13, pp. 549-550, 1901. 
Contains brief description of the skeleton obtained by a recent expe- 
dition of the Field Columbian Museum. 
653 Ritter (Wm. E.). Some observations bearing on the probable 
subsidence during recent geologic times of the Island of 
Santa Catalina off the coast of southern California. 
Science, new ser., vol. 14, pp. 575-577, 1901. 
654 Robinson (H. H.). On octohedrite and brookite, from Brindle- 
town, North Carolina. 
Am. Jour. Sci., 4th ser., vol. 12, pp. 180-184, figs. 1-6, 1901. 
Describes occurrence and crystal]* "graphic characters of the minerals. 
655 Rogers (Austin F.). Mineralogical notes, No. 2. 
Am. Jour. Sci., 4th ser., vol. 12, pp. 42-48, figs. 1-8, 1901. 
Describes crystallographic characters of calcite, galena, pyrite, topaz, 
leadhillite, iivarite, caledonite, barite, and celestite. 
656 The Pottawatomie and Douglas formations along the Kansas 
River. 
Kan. Univ. Quart,, vol. 9, pp. 234-251, L900. 
(Jives lists of fossils from various localities. 
