NO. 2038. FOaSIL CRICOID GENUS ROMOCRlNUki— KIRK. 483 



BIBLIOGRAPHY. 



1893. Bather, F. A. The Crinoidea of Gotland, pt. 1, K. Svenska Vet.-Akad. 



Handl., vol. 25, No. 2, 200 pp., 10 pis. 

 1847. Hall, James. Natural History of New York, pt. 6, Paleontology, vol. l, 



23+338 pp., 99 pis. 

 1852. Natural History of New York, pt. 6, Paleontology, vol. 2, 8+362, 



pp. 99 pis. 

 1859. Natural History of New York, pt. 6, Paleontology, vol. 3, pt. 1, 



text, 12+532 pp., 1859, pt. 2, 143 pis., 1861. 

 1888. RiNGUEBERG, E.N. S. The Niagara Shales of Western New York; a study 



of the origin of their Subdivisions and their Faunae: The American Geo- 

 logist, vol. 1, No. 5, pp. 264-272, May 1888. 

 1879. Wachsmuth and Springer. Revision of the Palteocrinoidea: Pt. 1, Proc. 



Acad. Nat. Sci. Philadelphia for 1879, pp. 226-378, pis. 15-17. Author's 



edition, 153 pp. pis. 1-3. 

 1886. Revision of the Palseocrinoidea: Pt. 3, sec. 2, Proc. Acad. Nat. Sci. 



Philadelphia for 1886, pp. 64-226. Author's edition, pp. 139-334. 



EXPLANATION OF PLATE 42. 

 Homocrinus parvus Hall. 



Fig. 1. View of left anterior radius of dorsal cup, and first primibrachs. X 8. 



2. View of posterior interradius. X 8. 



3. View of right posterior interradius. X 8. 



4. View of anterior radius. X 8. 



5. View of another specimen showing crown and portion of column. X 3. 



6. View apparently of left anterior radius X 3? after Hall, Pal. New York, vol. 



2, pi. 41, fig. Ic. 



7. Analysis of dorsal cup, copied from Hall, Pal. New York, vol. 2, pi. 41, fig. Id. 



8. Analysis of the dorsal cup. X 8. 



Lasiocrinus tenuis (Bather) new combination. 



Fig. 9. Posterior interradius X 3, after Bather, Crinoidea of Gotland, pi. 4, fig. 144. 



Lasiocrinus scoparins (Hall) new combination. 



Fig. 10. Posterior interradius of one of the type specimens. X 2. 



11. View of crown X 2, probably of anterior radius. 



12. Analysis of dorsal cup. X 4. 



