336 PROCEEDINGS OF THE ACADEMY OP [1879. 



1869. Pot. (Scaphiocr.) delicatus Meek & Worthen. Proc. Acad. Nat. Sei. Phila., 

 p. 144; Geol. Rep. HI., vol. v. p. 407, pi. 1, fig. 10. Upper Burl, limest. 

 Subcarb. Burlington, Iowa. 



1860. Pot. (Scaphiocr.) divaricatus Hall. Supp. Geol. Rep. Iowa, p. 65. War- 

 saw limest. Subcarb. Illinois and Indiana. 



1858. Pot. (Scaphiocr.) dichotomus Hall. (Type of Scaphiocrinus, as proposed 

 by us.) Geol. Rep. Iowa, vol. i. pt. ii. p. 553. Upper Burl, limest. Sub- 

 carb. Burlington, Iowa. 



1873. Pot. (Scaphiocr.) Huntsvillae Worthen. Geol. Rep. 111., vol. v. p. 534, pi. 

 20, fig. 1. St. Louis limest. Subcarb. Huntsville, Ala. 



*1860. Pot. (Scaphiocr.) Keokuk Hall. (Poteriocr. Keokuk.) Supp Geol. Rep. 

 Iowa, p. 64. Keokuk limest. Subcarb. Keokuk Iowa. 



1858. Pot. (Scaphiocr.) internodius Hall. Geol. Rep. Iowa, vol. i. pt. ii. p. 679, 

 pi. 25, fig. 2. Chester limest. Subcarb. Chester, 111. 



*1843. Pot. (Scaphiocr.) isacobus Austin. (Poteriocr. isacobus.) Ann.andMng. 

 Nat. Hist., vol. ii. p 195. Mon. Rec. and Foss. Crin. , p. 74, pi. 8, fig. 4 

 a, b. Subcarb. England and Ireland. 



1869. Pot. (Scaphiocr.) nanus Meek & Worthen (not Poteriocr. nanus, Ad. Roe- 

 mer, 1868 = Homocrtuus nanus). Proc. Acad. Nat. Sci. Phila., p. 141; 

 Geol. Rep. 111., vol. v. p. 423, pi. 1, fig. 8. Lower Burl, limest. Subcarb. 

 Burlington, Iowa. 



1869. Pot. (Scaphiocr.) penicillus Meek & Worth. Proc. Acad. Nat. Sci. Phila., 

 p. 142. Geol. Rep. 111., vol. v. p. 414, pi. 2, fig. 7. Upper Burl, limest. 

 Subcarb. Burlington, Iowa. 



*1S67. Pot. (Scaphiocr.) pusillus Trautschold (Hydriocrinus pusillus). Bull.de 

 la Soc. Imp. des Naturalists de Moscou, p. 16, pi. ii. fig. 9; Quenstedt. 

 Petrefact. Deutschlands, iv. p. 527, pi. 108, fig. 47. Trautschold, 1879. 

 Kalkbriiche von Mjatschkowa, p. 116, pi. 14, fig. 4, and pi. 15, fig. 2. Up- 

 per Subcarb. Near Moscow, Russia. 



1861. Pot. (Scaphiocr.) ramulosus Hall. Bost. Journ. Nat. Hist., p. 307. Upper 

 Burl, limest. Subcarb. Burlington, Iowa. 



1873. Pot. (Scaphiocr.) Randolphensis Worthen. Geol. Rep. 111., vol. v. p. 551, 

 pi. 21, fig. 14. Chester limest. Subcarb. Chester, III. 



1863. Pot. (Scaphiocr.) rusticellus White. Bost. Journ. Nat. Hist., p. 505. Up- 



per Burl, limest. Subcarb. Burlington, Iowa. 

 1858. Pot. (Scaphiocr.) scoparius Hall. Geol. Rep. Iowa, vol. i. pt. ii. p. 680, pi. 



25, fig. 3. Chester limest. Subcarb. Chester, III. 

 *1852. (?)Pot. (Scaphiocr.) spinosus Owen & Shumard (Poteriocr. spinosus). U. 



S. Geol. Surv. Wis., Iowa, and Min., p. 596, pi. v B, fig. 4. Chester limest. 



Subcarb. Grayson Co., Ky. 



It is possible that this species belougs to Hydreionocrinus the 

 figure is very imperfect. 



1864. Pot. (Scaphiocr.) subcarinatus Hall. 17th Rep. N. Y. St. Cab., p. 58; 



Geol. Surv. Ohio, Pal., vol. ii. p. 176, pi. 12, figs. 13, 14. Waverly Gr. 

 Subcarb. Richfield, Ohio. 

 *1861. Pot. (Scaphiocr.) subimpressus Meek & Worthen (Poteriocr. subimpres- 

 sus). Proc. Acad. Nat. Sci. Phila., p. 138. Geol. Rep. 111., vol. iii. p. 

 485 pi. 18, fig. 1 a, b. Lower Burl, limest. Subcarb. Burlington, Iowa. 



