INTRODUCTION 13 



Springs, Kentucky. In Monroe and Randolph counties, Illinois, Braun in 1913, by careful 

 collecting and by quarrying in one locality, obtained a very fine lot of well-preserved specimens 

 of this formation ; while the Hambach collection contains the fruits of many years' annual 

 expeditions into that region. 



Foreign equivalents. Russian ; from the Bergkalk at Moscow, a complete series obtained 

 from Professor Trautschold, including good specimens of all his species, supplemented by 

 others secured since that time by purchase from dealers. British ; from the Hurlet limestone 

 of the Scotch Carboniferous, a fauna remarkably similar to the American Kaskaskia, a good 

 collection obtained by exchange. 



Upper Carboniferous. Straggling specimens from the Lower Coal Measures of Kansas 

 and Illinois. From the upper beds and Permo-Carboniferous of Missouri, Kansas, and New 

 Mexico. Especially two collections by local collectors from the great find of well-preserved 

 specimens at Kansas City, and a considerable quantity of the same material in the Hambach 

 collection. 



mesozoic : 



Very complete series from the Muschelkalk of the German Trias — Encrinus and allied 

 forms ; from the Liassic of Lyme-Regis, England, and the Holzmaden area in Germany — 

 Pentacrinus, etc. ; the Middle Jurassic of England and Northern France — Apiocrinus, etc. ; 

 Upper Jurassic of France, Germany and America — Isocrinus, etc. ; Cretaceous of England— 

 Marsupites, Bourgueticrinus, etc. ; and of America, Uintacrinus — the extensive material used 

 instudies for my memoir of 1901 on that genus, except most of the figured specimens which 

 are at the Museum of Comparative Zoology. 



recent : 



A small but useful series of comatulids and stalked crinoids necessary for the study of 

 the fossils, accumulated prior to the removal of my collection to Washington, containing some 

 extremely rare forms, such as Holopus. 



Speaking of the Flexibilia alone, the collection contains good specimens of 142 species out 

 of the total of 176, or 80 per cent of all the recognized forms. 



Collectors 



During the years in which the above-mentioned material was being ac- 

 cumulated I was fortunate in obtaining the services of several able and zealous 

 collectors. The first was Mr. Charles S. Beachler, of Crawfordsville, Indiana, 

 a graduate of the Wabash College of that place, who began his field work 

 under my direction in 1887, and continued for about four years. During this 

 time he quarried the famous Crawfordsville beds; discovered in the same 

 county the more important locality on Indian Creek, which goes by his name 

 among the fossil hunters, and spent another season working it; made collec- 

 tions in two other Keokuk localities discovered by him in that region; quarried 

 in the Waldron beds at Conn's Creek; collected carefully in the Laurel exposures 

 at St. Paul; made two trips among the different localities in southern Indiana 

 and Kentucky, and also one to Boonville, Missouri. He had a good knowledge 

 of the geology of the Indiana Carboniferous formations, and published several 

 papers in relation to them. Mr. Handel T. Martin, now Curator of Paleon- 

 tology in the University of Kansas at Lawrence, assisted me in making my 

 extensive Uintacrinus collections in the Cretaceous of western Kansas, and 



