376 PROCEEDINGS OF WASHINGTON MEETING. 



that Wachsmuth and Springer began to publish the results of their in- 

 vestigations. The most important works by these two authors are the 

 " Revision of the Paleocrinoidea," published by the Philadelphia Acad- 

 emy of Natural Science, between 1879 and 1886, and the superb " Mono- 

 graph of the Crinoidea Camerata of North America," published by the 

 Museum of Comparative Zoology. 

 The complete list of titles compiled by Dr Keyes* is as follows : 



BIBLIOGRAPHY 



Evidence of two distinct geological formations in the Burlington limestone: Am. 



Jour. Sci. [2], vol. 42, 1866, pp. 1-7. 

 Notes on the external structure of Paleozoic crinoids : Ibid, [3], vol. 14, 1877, pp. 



115-127 and 181-191. 

 Ee vision of the genus Belemnocrinus and descriptions of two new species : Ibid. [3], 



vol. 14, 1877, pp. 253-259. 

 Transition forms in crinoids: Proc. Acad. Nat. Sci., Phila., 1878, pp. 224-266. 

 Revision of the Pal£eocrinoidea ; part I, Ichtyocrinoidse and Cyathocrinoidse : 



Ibid., 1879, pp. 226-379. 

 Revision of the Palseocrinoidea ; part II, Sphseroidocrinoidse : Ibid., 1881, pp. 177- 



414. 

 Remarks on Glyptocrinus and Reteocrmus, two genera of Silurian crinoids : Am. 



Jour. Sci, [3], vol. 25, 1883, pp. 225-268. 

 Hybocrinus, Hoplacrinus, and Beerocrinus: Ibid. [3], vol. 26, 1883, pp. 365-377. 

 On the Challenger report on the stalked crinoids : Science, vol. 6, 1895, pp. 138, 139. 

 Description of fossil invertebrates : Illinois Geol. Survey, vol. 7, 1885, pp. 339-345. 

 On a new genus and species of blastoids : Ibid., vol. 7, 1885, pp. 339-357. 

 Description of a new crinoid from the Hamilton group of Michigan : Proc. Daven- 

 port Acad. Sci., vol. 4, 1885, pp. 94-96. 

 Revision of the Palseocrinoidea ; part III, section I: Proc. Acad. Nat. Sci., Phila., 



1885, pp. 225-364. 

 Revision of the Palseocrinoidea ; part III, section II : Ibid. , 1886, pp. 64-226. 

 Summit plates in blastoids, crinoids, and cystids and their morphological rela- 

 tions: Ibid., 1887, pp. 82-114. 

 Discovery of the ventral structure of Taxocrinus and Haplocrinus, and consequent 



modifications in the classification of the crinoids : Ibid. , 1 888, pp. 337-390. 

 Crotalocrinus : its structure and zoological position: Ibid., pp. 364-390. 

 Perisomic plates of the crinoids: Ibid., 1890, pp. 345-392. 

 New species of crinoids and blastoids from the Kinderhook group of Le Grande, 



Iowa: Illinois Geol. Survey, vol. 8, 1890, pp. 157-251. 

 Description of two new genera and eight species of camerate crinoids from the 



Niagara group : Am. Geologist, vol. 10, 1892, pp. 135-144. . 

 Monograph of the Crinoidea Camerata of North America : Memoirs of Museum of 



Comparative Zoology, 2 vols., 1895, 800 pp., and atlas of 83 plates, comprising 



1,500 illustrations. 



*American Geologist, vol. xvii, March, 1896, p. 136. 



