TITLES. 
Moll 15 
204. Gordon, W. J. Our Country’s Shells, and how to know them. 
London, 8vo, 1901, vii + 152 pp., 33 pis. 
205. Gorjanovic-Kramberger, K. Uber die Gattung Valenciennesia und 
einige unterpontische Limnaeen. Ein Beitrag zur Entwickelungs- 
geschichte der Gattung Valenciennesia und ihr Yerhaltniss zur Gattung 
Limncea. Beitr. Pal. Oesterr.-Ung. xiii, pp. 121-144, pis. ix & x, 
10 figg. 
206. Grabau, A. W. The Palaeontology of Eighteen Mile Creek and the 
Lake Shore sections of Erie County, New York. Bull. Buffalo Soc. 
vi, pp. 93-203, figg. 
207. -. Guide to the Geology and Paleontology of Niagara Falls and 
Vicinity. Op. cit. viii, pp. 1-284, figg. 
Includes paper by Letson, E. J., on Post-pliocene molluscs. 
208. -. A Preliminary Geologic Section in Alpena and Presque Isle 
Counties, Michigan. Amer. Geol. xxviii, pp. 177-189, pi. xx. 
209. -. Palaeontology of the Cambrian Terranes of the Boston Basin. 
Pap. Boston Soc. iv, vol. i, pp. 601-694, pis., figg. [1900]. 
- . [See also Johnson & Grabau (272).] 
210. Gratacap, L. P. Catalogue of the Binney and Bland Collection of 
the Terrestrial Air-Breathing Mollusks of the United States and 
Territories in the American Museum of Natural History, with 
Enumeration of Types and Figured Specimens, and Supplementary 
Notes. Bull. Amer. Mus. xiv, pp. 335-404, pis. xli-xlvi (maps). 
211. Grave, C. The Oyster reefs of North Carolina, a geological and 
economic study. Johns Hopkins Univ. Circ. xx, pp. 50-53. 
212. Gravier, C. Sur le commensalisme de XEunice harassii Audouin et 
M.-Edwards, et de VOstrea edulis L. Bull. Mus. Paris 1900 [1901], 
pp. 415-417. 
213. -. Guide du Zoologiste collectionneur. Methodes du recolte, de 
fixation et de conservation des Invertebres. Paris, 8vo, 1901, 104 pp. 
& 113 figg. in text. 
214. Gredler, V. Drei neue Land-Conchylien [Patula , Hypselostoma, 
Clausilia\ aus China. Nachrbl. Deutsch. malak. Ges. 1901, pp. ISO- 
153. 
215. Grieg, J. A. [See Friele & Grieg (190).] 
216. Grierson, P. H. Notes on the Mollusca of Co. Leitrim. Irish 
Natural, x, pp. 110 & 111. 
217. Grobben, C. Zur Kenntniss der Morphologie und Anatomie von 
Meleagrina sowie der Aviculiden im allgemeinen. Ber. Comm. Ocean. 
Forschungen vii, pp. 487-496, 2 pis. 
Also to appear in Denk. Ak. Wien lxix. 
218. Gronwall, K. A. Slaktet Dimyodon i Danmarks Krita. Medd. 
Dansk Geol. For. No. 6, pp. 73-82, pi. ii, figg. 1-8. 
219. Gude, G. K. A third report on Helicoid land-shells from Japan and 
the Loo Choo Islands. P. Malac. Soc. London iv, pp. 191-201, 
pis. xix-xxi. 
220. -. Description of a new Species of Chloritis [oshimana'] from the 
Loo-Choo Islands. Ann. Nat. Hist, viii, pp. 157 & 158, fig. 
