160 PROCEEDINGS OP THE ACADEMY OP [1886. 



The following species are to be added to our former list : 

 a. With simple brachials. 



*1882. Soaphiocrinus kaskaskiensis (Worthen), Poteriocrinus kaskaskiensis, 



Bull, i, 111. St. Mus. Nat. Hist., p. 27; also Gool. Rep. 111., vii, p. 300, PI. 



30, fig. 15. Kaskaskia limest. Near Chester, 111. 

 *1882. S. latidactylus (Worthen), Poteriocrinus latidactylus, Bull, i, 111. St. Mus. 



Nat. Hist., p. 8; also Geol. Rep. 111., vii, p. 275, PI. 28, fig. 6. Keokuk 



limest. Hamilton, 111. 

 *1884. S. obscurus W. and Sp. (Poteriocrinus tenuidactylus Worthen), Bull, i, of 



the 111. St. Mus. Nat. Hist., p. 6 (not p. 10 ; nor Pot. [Scaph.] tenuidactylus 



M. and W., 1865) ; also Geol. Rep. Illinois, vii, p. 271, PI. 28, fig. 13. Keokuk 



limest. Keokuk, Iowa. The specific name tjeing preoccupied by M. and W. 



in Geol. Rep. 111., iii, p. 490, PI. 18, fig. 10, we propose for this species the 

 . above name. 

 *1882. S. occidentals (Worthen), Poteriocrinus occidentalis Worthen (not Shum.), 



Bull, i. 111. St. Mus. Nat. Hist., p. 10; also Geol. Rep. Illinois, vii, p. 278, 



PI. 29, fig. 2. Keokuk limest. Hamilton, 111. The name Pot. occidentalis 



was preoccupied, in 1852, by Owen and Shum., Geol. Rep. of Wise, Iowa 



and Minnesota, p. 596, PI. 5 b, fig. 5 ; but, as it has since been referred to 



Agassizocrinus, we propose retaining Worthen's name for the above species. 

 *18S2. S. okawensis (Worthen), Poteriocrinus okawensis, Bull, i. 111. St. Mus. 



Nat. Hist., p. 24; also Geol. Rep. Illinois, vii, p. 296, PI. 29, fig. 2. Kas- 



kaskia gr. Okaw River, 111. 

 *1882. S. Orestes (Worthen), Poteriocrinus Orestes, Bull, i. 111. St. Mus. Nat. Hist., 



p. 7; also Geol. Rep. Illinois, vii, p. 273, PI. 27, fig. 3. Keokuk limest. 



Keokuk, Iowa. (Compare with Scaph. Coreyi M. & W.) 

 *1882. S. popensis (Worthen), Poteriocrinus popensis, Bull, i. 111. St. Mus. Nat. 



Hist., p. 23; also Geol. Rep. Illinois, p. 290, PI. 29, fig. 12. Kaskaskia gr. 



Pope Co., 111. 

 *1882. S. propinquus (Worthen), Poteriocrinus propinquus, Bull, i, HI. St. Mus. Nat. 



Hist., p. 26 ; Geol. Rep. 111., vii, PI. 29, fig. 9. Kaskaskia gr. Monroe Co., 111. 

 *1882. S. Salteri (Worthen), Poteriocrinus Salteri, Bull, i, 111. St. Mus. Nat. Hist., 



p. 21 ; Geol. Rep. 111., vii, PI. 29, fig. 18. Kaskaskia gr. Chester, 111. 

 1880. S. spinifer Wutherby, Journ. Cincin. Soc. Nat. Hist. (July), p. 13, PI. 5, fig. 



5. GrapMocrinus spinifer S. A. Miller, 1883, Catalogue Amer. Pal. Foss. 



Ed. ii, p. 287. Kaskaskia gr. Pulaski Co., Ky. 

 *1882. S. spinobracMatus (Worthen), Poteriocrinus spinobrachiatus (not Hall), 



Bull, i. 111. St. Mus. Nat. Hist., p. 20; also Geol. Rep. 111., vii, p. 290, PI. 



29, fig. 1. Kaskaskia gr. Monroe Co., 111. Hall described in 1861 a 



species under P. (ScapMocrinus) spinobrachiatus, which we referred in 



Rev. i, p. 123, to Graphiocrinus. 

 *1882. S. varsoviensis (Worthen), Poteriocrinus varsoviensis, Bull, i. 111. St. 



Mus. Nat. Hist., p. 20; also Geol. Rep. Illinois, vii. p. 290, PI. 28, fig. 



15. Warsaw limest. Warsaw, 111. 

 *1882. S. venustus (Worthen), Poteriocrinus venustus, Bull, i, HI. St. Mus. Nat. 



Hist., p. 24; also Geol. Rep. 111., vii, p. 297, PI. 29, fig. 13. Kaskaskia gr. 



Monroe Co., 111. 

 %. P. peculiaris Worthen, (described Bull, i. III. St. Mus. Nat. Hist., p. 26, as 



Pot. clytis), Geol. Rep. 111., vii, p. 298, PI. 29, fig. 10. The specimen from 



which the species was described has an anomalous arrangement of anal plates. 



