weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1894. 39 
144 Dawson (J. William). Our record of Canadian earthquakes. 
Can. Rec. Sci., vol. vi, pp. 8-16. 
Gives a list of publications of the records of Canadian earthquakes 
prior to 1877, and includes a list and description of earthquakes occur- 
ring since that time. 
145 Note on the genus Naiadites, as occurring in the coal forma- 
tion of Nova Scotia. 
Geol. Soc. London, Quart. Jour., vol. 1, pp. 435-437, pi. xx. 
Describes the occurrence of this genus aud its associates in the coal 
deposits of Nova Scotia. 
140 The study of fossil plants. 
Geol. Soc. Am., Bull., vol. v, pp. 2-5. 
Discusses the importance of fossil plants as an aid in determining 
the geologic age of rocks and climatic conditions. 
147 Some recent discussions in geology. 
Geol. Soc. Am., Bull., vol. v, pp. 101-116. 
Abstracts: Am. Geol., vol. xiii, pp. 135-137; Am. Jour. Sci., 3d ser., 
vol. xlvii, pp. 135-136. 
Discusses the correlation of the Cambrian rocks of North America 
and Great Britain, the forces that have produced mountain ranges, 
uniformitarianism, the formation of coal, the relation of vegetation 
to continental movements, the phenomena of the Glacial period, and 
post-Pleistocene continental movements. 
147<y The Canadian Ice age. 
William V. Dawson, Montreal, 1893. 
Review: Jour, of Geol., vol. ii, pp. 232-235, by T. C. Chamberlin. 
Abstracts: Am. Jour. Sci., 3d ser., vol. xlvii, pp. 146-147 (h p.); Am. 
Geol., vol. xiii, pp. 116-121 ; Can. Rec. Sci., vol. vi, pp. 113-115. 
148 Dean (Bashford). Contributions to the anatomy of Dinichthys. 
N. Y. Acad. Sci., Trans., vol. xii, p. 187. 
Abstract: Am. Geol., vol. xiii, pp. 357-358 (8 1.). 
149 A new cladodont from the Ohio Waverly, Cladoselache new- 
berryi n. sp. 
N. Y. Acad. Sci., Trans., vol. xiii, pp. 115-118, pi. 1. 
Describes and figures specimens from the sub-Carboniferous of Ohio. 
150 Contributions to the morphology of Cladoselache (Cladodus). 
Jour, of Morph., vol. ix, pp. 87-114, pi. vii. 
Suggests the name Cladoselache for that of Cladodus for the Ameri- 
can form. Discusses the relationships under the different structural 
characters. 
151 DeKalb (Courtenay). The new gold fields of the Mosquito coast 
of Nicaragua. 
Eng. and Mg. Jour., vol. lvii, pp. 294-295. 
The gold occurs in placers in the Matagalpa Mountains, of small 
extent but very rich, and in "pockets." The mountains are said to 
bo Hanked by Carboniferous limestones overlain by Permian red sand- 
stones and shales which have been covered by diorite flows, and the 
gold occurs along tho contact of the shales and diorite mass. 
