354 TRANS. OF THE ACAD. OF SCIENCE. 



AMYGDALOCYSTITES, Billings (continued). 



radiatus, Billings, 1854. Canad. Jour., vol. ii., p. 271 Id. 1857. 



Geol. Surv. Canada, p. 289. — Id. Canad. Org. Rem., Dec. 

 3, p. Go, pi. vi., fig. 3. — Ottawa, Canada, 

 tenuistriatus, Billings, 1854. Canad. Jour., vol. ii., p. 271.— Id. 

 1857. Geol. Surv. Canada, p. 289.— Id. 1858. Canad. Org. 

 Rem., Dec. 3, p. G4, pi. G, fig. 2. — Ottawa and Belleville, 

 Canada. 



AMPHORACRINUS, Austin, 1848. Quart. Jour. Geol. Soc. Lond., 

 p. 292. (Subgenus of Actinocrisus.) 



ANCYROCRINUS, Hall, 18G2. 15th Rep. Reg. State Cab. N. York, 



p. 117. 

 bulbosus, Hall, July, 1862. 15th Rep. Reg. State Cab. N. Yoik, p. 



118, pi. 1, fig. 25 & 26.— Ham.— Shore of Lake Erie, 

 spinosus, Hall, July, 1862. 15th Rep. Reg. State Cab. N. York, 



p. 119, pi. 1, fig. 27 & 28.— U. //.—Falls of Ohio. 



ANOMALOCYSTITES, Hall, 1859. Paljeont. New York, vol. ill., 

 p. 132. 



cornutus, Hall. 1859. Pal. New York, vol. iii., p. 133, pi. vii. A, 



fig. 5-7.— L. #.— Herkimer Co., N. York, 

 disparilis, Hall, 1859. Pal. N. York, vol. iii., p. 145, pi. 88, fig. 



1-4. — Orisk. — Cumberland, Maryland. 



APIOCYSTITES,f Forbes, 1848. Mem. Geol. Surv. Great Britain. 



Lepocrinus, Conrad, 1840. Lepocrimtes, Mather, 1843. 

 elegans, Hall, 1852. Pal. N. York, vol. ii., p. 243, pi. 41, fig. 1- 



17. — Niag. — Lockport, New York. 

 Gebhardi — Lepocrinites, Mather, 1843. Geol. 4th Dist. N. York, 



p. 347, fig. 4 & 5. — Lepadocrinvs Gebhardi, Hall, 1859. 



Pal. New York, vol. iii., p. 127, pi. 7, fig. 1 to 20.— Apio- 



cystites Gebhardi, Dana, 1863. Man. Geol., p. 253, fig. 417. 



— L. H. — Scoharie and Ulster Counties, New York, 

 imago, Hall, 1864. New or little known Foss. from Niag. Group, 



p. 10, pi. 1, fig. 9. — Niag. — Racine, Wisconsin. 



AR01LEOCIDARIS, McCoy, 1844. Synops. Carb. Limes. Foss, Ire- 

 land, p. 173. 



aculeata, Shumard, 1858. Trans. Acad. Sci. St. Louis, vol. i., p. 

 223.-^4. Verneuiliana, Swal. Ibid, p. 180. (Not A. Ver- 

 neuiliana, King.) — U. CM. — Valley of Verdigris River, 

 25 miles west of Council Grove, Kansas ; Fort Belknap, 

 Texas. 



Agassizi, Hall, 1858. Geol. Iowa, vol. i., p. 698, pi. 26, fig, 1. — 

 Enc. — Burlington, Iowa. 



1 1 adopt the generic term Apiocystites although aware that Conrad in 1840 

 and Mather in 1843 had designated a similar Crinoid under the name Le- 

 pocrinus. Conrad's description, however, was so unsatisfactory that no one 

 could possibly recognize the fossil from it, and Mather gave merely a fig- 

 ure and name without description. It is only through works of Prof. Hall, 

 published alter Forbes' excellent description and illustrations of his Genus 

 ApiocystUeB, that we have learned what fossil Conrad meant to describe. 

 Under these circumstances, I conceive it but just to give preference to 

 Forbes' name. 



