1879.] NATURAL SCIENCES OF PHILADELPHIA. 325 



The inner canal is large throughout and increases in size toward 

 the root. 



Geological position, etc. The genus has a very limited range. 

 It occurs so far as known only in the Subcarboniferous, and in 

 America, where it first appeal's in the Lower Burlington lime- 

 stone. It is found in the greatest profusion and size in the Keo- 

 kuk, and has only two representatives in the Warsaw, where it 

 becomes extinct. 



We recognize 23 species, 2 of them being doubtful. 



I860. Barycrinus angulatus Meek & Worthen. (Cyathocr. angulatus.) Proc. 



Acad. Nat. Sei. Phil., p. 3 ( J1 ; Geol. Rep. 111., vol. ii. p. 234, pi. 17, fig. 4; 



Barycr. angulatus, 1868, Proc. Acad. Nat. Sci. Phil., p. 340. Burlington 



and Keokuk transition bed. Subcarb. Nauvoo, Illinois (probably syn. of 



B. sculptilis Hall). 

 1858. Barycr. bullatus Hall. (Cyathocr. bullatus.) Geol. Rep. Iowa, vol. i. pt. 



ii. p. 624, pi. 18, fig. 1. Barycr. bullatus M. & W. 1868. Proc. Acad. Nat. 



Sci. Phil., p. 340. Keokuk limest. Subcarb. Keokuk, Iowa. 

 Sy?i-. Cyathocr. protuberans Hall. Geol. Rep. Iowa, vol. i. pt. ii. p. 626, pi. 



18, fig. 9. 

 1850. Barycr. cornutus Owen & Shumard. (Cyathocr. comutus.) Jour. Acad. 



Nat. Sci. Phil. (2d ser.), vol. ii. ; U. S. Geol. Surv. Wise , Iowa, and 



Minn., p. 561, pi. 5, fig. 8 a, b ; Barycr. comutus, 1868. Proc. Acad. 



Nat. Sci. Phil., p. 340. Lower Burl, limest. Subcarb. Burlington, 



Iowa. 



1860. Barycr. crassibrachiatus Hall. (Cyathocr. crassibracMatus.) Supp. Geol. 



Rep. Iowa, p. 60; Barycr. crassibrachiatus, 186S. Proc. Acad. Nat. Sci. 

 Phil., p. 340. Keokuk limest. Subcarb. Warsaw, III. 

 1873. (?) Barycr. geometricus Meek & Worthen. (Cyathocr. 1 undetermined.) 

 Geol. Rep. 111., vol. iii. pi. 20, fig. 5 a-c ; vol. v. pi. 12, fig. 3. Keokuk 

 limest. Subcarb. Warsaw, 111. 



The original specimen is very imperfect, possibly Niptero- 

 crinus. 



*1868. Barycr. herculeus Meek & Worthen. (B. Hoveyi var. herculeus.) 

 Proc. Acad. Nat. Sci. Phil., p. 341; Geol Rep. 111., vol. v. p. 485, pi. 13, 

 fi<r. 2. Keokuk limest. Subcarb. Crawfordsville, Ind. 



This is a good species, and not a variety. 



1861. Barycr. Hoveyi Hall. (Cyathocr. Hoveyi.) Desc. New. Pal. Crin., p. 5; 



Bost. Jour. Nat. Hist., p. 293 ; Meek & Worthen, 1873. B Hoveyi, 



Geol. Rep. 111. vol. v. p. 486, pi. 13, fig. 1. Keokuk limest. Subcarb. 



Crawfordsville, Ind. 

 *1862. Barycr. Kelloggi White. (Cyathocr. Kelloggi.) Proc. Bost. Soo. Nat. 



Hist., p. 8. Keokuk limest Subcarb. Biggsville, III. 

 1858 Barycr. magister Hall. (Cyathocr. magister.) Geol. Rep. Iowa, vol. i. 



pt. ii. pi. 18, figs. 2, 3 ; B. ?nagister, 1868, Proc Acad. Nat. Soi. Phil., 



p. 340. Keokuk limest. Subcarb. Keokuk, Iowa. 



