504 REPORT OF NATIONAL MUSEUM, 1S92. 



GEORGE K. Chekrie — Continued. 



(42) Gontopus lugubris, (43) Platypsaris aglaice, (44) Pachyrhamphus versicolor, (45) Pipra 

 velutina, (46) Pipra leucorrhoa, (47) Pipra leucocilla, (48) Pipra mentalis, (40) Trogon elegant., 

 (50) Antrostomus vociferus, (51) Goccygus minor, (52) Chloronerpes simplex, (53) Melanerpes 

 chrysaucTien, (54) Accipiter turns. 

 F. W.Clarke. The relations of abstract research to practical invention. 



7'<V'- ,sw. Monthly, August, 1891, p. 540. 

 P. W. Clarke. Table of atomic masses. 



A leaflet published by C. F. Chandler, October, 1891, for the use of students in Columbia 

 College. 

 F. W. Clarke. Administrative report as chief chemist. 



Tenth Annual Report of the U.S. Geological Survey. 

 F. YV. Clarke. The practical analysis of silicates. 



Journ. Amer. Ghem. Soc, December, 1891, xin, p. 277. 

 F. W. Clarke. Tschermak's theory of the chlorite groups and its alternatives. 



Amer. Journ. Sci., March, 1892, pp. 190-200. 

 F. W. Clarke. Report of the Department of Minerals in the TJ. S. National Mu- 

 seum, 1889. 



Report of the Smithsonian Institution {TJ. S. National Museum), 1889 (1891), p. 401. 

 F. W. Clarke. Report on Prof. Morley'e researches. 

 Report of the Smithsonian Institution. 1890>(1891), p. 83. 

 F. YV. Clarke and E. A. Schneider. On the condition of certain micas, vermicu- 

 lites and chlorites. 



Amer. Journ. Sci., September, 1891, pp. 242-251. 

 F. AY. Clarke and E. A. Schneider. Experiments upon the constitution of certain 

 micas and chlorites. 



Amer. J, mm. Sci.. May, 1892, pp. 378-386. 

 F. YV. Clarke and E. A. Schneider. Ueber die Einwirkung des Salmicks bei IMs- 

 sociatiou teniperatur auf Silicate. 

 Ber. d. Deutsch. Ghem. Gesell, 25, 883. 

 F. W. Clarke, chief chemist, and others. Bulletin 7X of the U. S. Geological Sur- 

 vey. Report of work done in the division of chemistry and physics, mainly 

 during the fiscal year 1889-'90. 

 F. YV. Clarke. Abstracts of various papers on atomic weights published from time 



to time in the Journal of Analytical and Applied Chemistry. 

 E. 1). COPE. A critical review of the characters and variations of the snakes of 

 North America. 



Proc. TJ. S. Nat. Mus., xiv, No. 882, pp. 589-694. 



The attempt is made to define with precision the species of North American snakes, 

 together with their variations. 



E. I>. Cope. Color-pattern in Cnemidophorus. 



Amer. Natural., XXV, 1801, pp. 1135, 1136. 



The longitudinally striped pattern shown to pass in a transversely banded form. 

 E. I>. Cope. Parallel color-patterns in lizards. 



Amer. Natural., XXVI, 1892, p. 522, pi. xviii. 



Calls attention to the parallelism of pattern development in Lacerta and ( Cnemidophorus. 

 E. D. Com:. The osteology of the Laceriitia. 



Proc. Am. PhU. Soc, xxx, 1892, pp. 185-221, pis. ii-vi. 



Descriptions of skeletons of various North American generic types. 



E. 1). Cope. On the characters of some paleozoic fishes. 



Proc. TJ. S. Nal. Mus., xiv, pp. 447-463. 

 Charles B. Cory. Descriptions of new birds from the Bahama Islands, with re- 

 marks on the species of Speotyio which occur in the West Indies. 

 The Auk, viii, No. 4, October, 1891, pp. 348, 349. 



New species are as follows: (1) Spindolis zena stejneger; Elenthera I. (p. 348) ; (2) Dendroiea 

 pityophila bahamensis, Abaco (p. ::48>; (3) Speotyto cunieularia bahamensis Inagua (p. 348). 

 John M. Coulter. Manual of the phanerogams and pteridophytes of Western 

 Texas. 



Gont. Nat. Kerb., n, June, 1892, pp. 153-345. 



This is the second part of a Manual of Western Texas. This number treats of the Gamo- 

 petalw only. 



