390 TRANS. OF THE ACAD. OF SCIENCE. 



PLATYCRINUS (continued). 



528. — Arch. — Keokuk, Iowa ; White's Creek Springs, Ten- 

 nessee; Allen Co., Kentucky. 

 Sara3 Hall, 1858. Geol. Iowa, vol. i., pt. 2, p. 073, pi. 17, fig. 4. 



— St. L. — St. Louis, Missouri, 

 scobina, Meek & Worthen, 1861. Proc. Acad. Nat. Sci. Phil., p. 



129. — Enc. — Burlington, Iowa, 

 sculptus, Hall, 1858. Geol. Iowa. vol. i., pt. 2, p. 53G, pi. 8, fig. 



xi. — Enc. — Burlington, Iowa. 

 Shumardanus, Hall, 1858. Geol. Iowa, vol. i., pt. 2, p. 532, pi. 8, 



fig. 5. — Enc. — Burlington, Iowa. 

 striobrachiatus, Hall, 1861. Des. New Crin., Prelim. Not., p. 4. — 



1861. Boston Jour. Nat. Hist., vol. vii., p. 287. — Enc. — 



Burlington, Iowa, 

 subspinosus, Hall, 1858. Geol. Iowa, vol. i., pt. 2, p. 536, pi. 8, 



fig. 9 & 10. — Enc. — Burlington, Iowa, 

 subspinulosus, Hall, 1860. Geol. Iowa, Sup. to vol. i., p. 81. — 



Enc. — Burlington, Iowa, 

 tentaculatus, Hall, 1859. Pal. N. York, vol. iii., p. 116, pi. 5, fig. 



1-4. — L. H. — Schoharie, New York. 

 Tennesseensis, v. Cupellsecrinus Tennesseensis. 

 truncatus, Hall, 1858. Geol. Iowa, vol. i., pt. 2, p. 537, fig. 59. 



— Enc. — Burlington, Iowa, 

 truncatulus, Hall, 1858. Geol. Iowa, vol. i., pt. 2, p. 538, fig. 60. 



— Enc. — Burlington, Iowa. 

 tubaerosus, Hall, 1858. Geol. Iowa, vol. i., pt. 2, p. 534^ pi. 8, fig. 



7. — Enc. — Burlington, Iowa, 

 verrucosus, White, 1863. Jour. Bost. Soc. Nat. Hist., vol. vii., 



p. 502. — Enc. — Burlington, Iowa. 

 Wortheni, Hall, 1858. Geol. Iowa, vol. i., pt. 2, p. 530, pi. 8, fig. 



4. — Enc. — Burlington, Iowa. 

 Yandelli, Owen & Shumard, 1850. Jour. Acad. Nat. Sci. Phil., 



vol. ii., p. 58, pi. 7, fig. 6.— 1852. Geol. Iowa, Wis. & Min., 



p. 587, tab. 5 A., fig. 6. — Enc. — Burlington, Iowa. 



PLEUROCYSTITES, Billings, 1854. Canad. Journal, vol. ii., 



p. 250. 

 Anticostiensis, Billings, 1857. Geol. Surv. Canada, p. 288. — 1858. 



Can. Org. Rem., Dec. iii., p. 52. — H. R. — Charleton Point, 



Canada, 

 elegans, Billings, 1857. Rep. Geol. Surv. Canada, p. 287.— 1858. 



Canad. Org. Rem., Dec. iii., p. 51, pi. 3, fig. 2. — Tr.— Ot- 

 tawa, Canada, 

 exornatus, Billings, 1858. Canad. Org. Rem. Dec. iii., p. 52. — 



Tr. — Montreal, Canada, 

 filitcxtus, Billings, 1857. Canada Jour., vol. ii., p. 252. — 1857. 



Geol. Surv. Canada, p. 286.— 1858. Can. Org. Rem., Dec. 



iii., p. 50, pi. 2, fig. 1. — Tr. — Ottawa, Canada. 



robustus, Billings, 1854. Canad. Jour., vol. ii., p. -"»-.— 1857. 

 Geol. Surv. Canada, p. 286.— 1858. Can. Org. Rem., Dec. 

 iii., p. 49, pi. 1, fig. 2.— Tr.— Ottawa, Canada. 



