[55] INSTKUCTIONS FOR COLLECTING MOLLUSKS DALL. 



more expensive, is Tryon's Manual of Conchology,* in three volumes, 

 issued by the Conchological section of the Academy of Natural Sci- 

 ences at Philadelphia. 



Publications which were intended to serve the purijose of handbooks 

 for students of our native mollusks have from time to time been issued 

 by the Smithsonian Institution and the U. S. National Museum. The 

 older papers of this class are to some extent out of print, but may be 

 obtained in most cases from dealers in second-hand books. The series 

 has comprised the following memoirs : 



Land and Fresh-water Shells of North America, by W. G. Binney and T. Bland. 8°, 

 in three parts. 

 Part I. Pulmonata Geophila. 316 pp., 544 ill. in the text. 1869. 

 Part II. Pulmonata Limnophila and Thalassophila. 161 pp., 261 ill. in text. 



1865. 

 Part III. Operculated Land and Fresh-water Species. 120 pp., 232 ill. in text. 



1865. 

 The three parts comprise Smithsonian publication numbers 194, 143, and 144, re- 

 spectively, and cover all the land and fresh-water gastropods except the 

 melanians. 

 Researches upon the HydrobiiuEe and Allied Forms [etc.], by Dr. William Stimpson. 

 59 pp., 29 figures in the text. 1865. 

 This is chiefly devoted to the fresh- water Rissoidse, and is No. 201 of the Smith- 

 sonian list. 

 Land and Fresh-water Shells of North America. Part iv. Strepomatidae (American 

 melanians), by Geo. W. Tryon, jr. 8°, 435 pp., 838 figures in the text. 1873. 

 This is Smithsonian number 253. 

 Monograph of American Corbiculadse, recent and fossil [etc.], by Temple Prime. 

 80 pp., 86 figures in the text. 1865. 

 This is Smithsonian number 145, and includes an account of the American Pisid- 

 ium, Sphoerium, CorMcula, and Cyrena. 

 A Manual of American Land Shells, by W. G. Binney. Bulletin No. 28, U. S. Nat, 

 Mus. 528 pp., 516 figures in the text. 8°. 1885. 

 This brings the subject of the Pulmonata, as treated in the "Land and Fresh- 

 water Shells," up to date, though under a difi"erent arrangement. 

 Bibliographies of American Naturalists, ii. The published writings of Isaac Lea, 

 LL. D. By Newton Pratt Scudder. Bulletin U. S. Nat. Mus. No. 23. 8°. 

 LX, 278 pp. and portrait. 1885. 

 In the absence of any general work on the American Unionidce, this biblio- 

 graphical index to Dr. Lea's works will be of use to students of the group. 

 A Preliminary Catalogue of the Shell-Bearing Marine Mollusks and Brachiopods of 

 the Southeastern Coast of the United States [etc.] . By William Healey Dall, 

 A. M. Bulletin U. S. Nat. Mus. No. 37. 221 pp., 74 pi. 1889. 

 This bulletin is devoted to the marine forms, which are illustrated by over 1,000 

 figures and tabulated so as to show their geographical and bathymetric dis- 

 tribution. The classification is revised and the tables are preceded by a 

 bibliography comprising titles of works bearing on the moUusca of the 

 region. 

 The nomenclature of the catalogue is extensively reformed over earlier usage, 

 and the collector or student who desires to understand why many names 

 have been changed or have disappeared will in most cases find the reasons 

 fully stated in the following publications. 



* Structural and Systematic Conchology, an introduction to the study of the Mol- 

 lusca, by Geo. W. Tryon, jr. Philadelphia, 1882-'84. 3 vols. 8°. 



