PUBLICATIONS OF CHARLES GIEARD, M. D. 13 



1852. GiRARD, Charles, with Spencer F. Baird — Coutiuued. 



Tiecessarily be widely separatiMl. The almost entire detjciency of modern general works upon 

 the Coluhridii;, has also been a serious obstacle to any correct idea of a natural system. 'J'hc 

 forthcoming work of M. M. Duni6ril will uudoubtly clear np luiich of the obscurity which 

 now exists. But when systematic writers all carefully avoid the sulyect of the Ojiliidians, 

 each waiting for the others to make the first step, the attempt to combine genera by well- 

 marked, tliouj^h perha])s artificial points of relation, will, it is hoped, bo looked ujmn with 

 indulgence, even after more c(miprehensive and extended investigations shall render it neces- 

 sary to break >ip the combinations here adopted. 



"The collections upon which the original descriptions of the present catalogue have been 

 based are as follows: — 



Spencer F. Baird. Species froni Massachusetts, New York, Ohio, and Pennsylvania. 



Charles frirard. Maine, Massachusetts, and South Carolina. 



Re^'. Charles Fox. Species from eastern Michigan. 



Dr. P. R. Hoy. Species from eastern Wisconsin. 



Prof. L. Agassiz. Lake Superior, Lake Huron, and Florida. 



Dr. J. P. Kirkland. Northern Ohio. 



G. W. Fahnestock. "Western Pennsylvania. 



Miss Valeria Blaney. Eastern Shore of Maryland. 



Dr. C. B. E. Keunerly. Nortbern Virginia. 



John H. Clark. Maryland, Texas, New Mexico, and Sonora. 



John Varden. District of Columbia and Louisiana. 



Dr. J. B. Barratt. Western South Carolina. 



Miss Charlotte Paine and Mrs. M. E. Daniel. Western South Carolina. 



Dr. S. B. Barker. Charleston, S. C. 



Prof. F. S. Holmes and Dr. W. J. Burnett. South Carolina. 



K. R. Cuyler and Dr. W. L. Jones. Georgia. 



D.C.Lloyd. Eastern Mississippi. 



Dr. B. F. Shumard and Col. B. L. C. Wailes. Mis.siasippi. 



James Fairie. Mexico and Western Louisiana. 



Capts. R. B. Marcy and G. B. McClellan, U. S. A. Red River, Ark. 



Ferdinand Lindheimer. Central Texas. 



Col. J. D. Graham, U. S. A. The specimens collected while on the U. S. and Mex. Boundary 

 Survey, by Mr. J. H. Clark, viz., in Texas, New Mexico, and Soriora. 



Maj. W. H. JImory. Specimens collected on the U.S. and Mexican Boundary Survey by 

 Arthur Scbott, at Eagle Pass, Tex., and by J. H. Clark, in Texas and New Mexico. 



Gen. S. Churchill, V. S. A. Valley of the Rio Grande. 



Dr. L. Edwards, U. S. A. Northern Mexico. 



Dr. Win. Gambel. New Mexico and California. 



Dr. John L. Le Conte. Littoral California. 



Dr. C. C. Boyle and J. S. Bowman. Central California. 



Dr. A. J. .Skilton. Species collected in California by Heniy Moores, Esq. 



U. S. Exploring Expedition. Littoral California and Oregon. 



Academy of Natural Sciences of Philadelphia. Various unique specimens described by 

 Dr. Holbrook. 



Boston Society of Natural History. California. 



" Smithsonian Institution, January 5, 1853." 



SYSTEMATIC INDEX OF WELL-ASCERTAINED SPECIES OF NORTH AMERICAN 



SERPENTS. 



Crotalus, Linn. 



Page. 



1. Crotalus dnrissue, Linn Penna., Louisiana, Mississippi 1 



2. " admanteris, Beauv South Carolina 3 



8. " flf^or, B. & G., n. s Texas 5 



4. " lucifer, H. &. G Oregon 6 



5. " confluentus, Say Arkansas, Texas 8 



6. " moto««M« B. & G., n. s Sonora 10 



7. " oregonus, Holbr Columbia River 145 



CROTALOPHORrs, (Jray. 



1. Vrotalophorus miliarivn, Holier Georgia, South Carolina 11 



2. " co/isors, B. & G., n. s Texas 12 



3. " tergeminuii. Holbr - Wise, Mich., Ohio 14 



4. " Edwardn, li. S^ G., n. s Mexico. Sonora 15 



5. " Kirtla^idi, KolhT Ohio 16 



