1881.] NATURAL SCIENCES OF PHILADELPHIA. 353 



Lower Subcarboniferous genus ; the only species so far recognized 

 in Europe has been found in the Devonian of the Eifel. 

 The following is a list of the known species : — 



1S69. Dory.rinus canaliculatus Meek and Worth. Proc. Acad. Nat. Sei. Phi!a , 



p. 16fi; Geol. Rep. 111., v, p. 381, PI. 6, fig. 4. Lower Burlington limest. 



Burlington, Iowa. 

 *1861. Dorycr. concavus Meek and Worth. (Actinocr. ooncavus) Proc. Acad. Nat. 



Sci. Phila., p. 131; Sphaerocr. Concavus Meek and Worth., 1865, Ibid., p. 



154; Coelocr. concavus Meek and Worth., 1865 (Dec), Ibid., p. 273; also 



Geol. Rep. 111., ii, p. 215, PI, 15, figs. 10 a, b, c. Lower Burling'on limest. 



Burlington, Iowa. 

 1858. Dorycr. cornigerns Hall. (Actiaoor. comigerus, not A. cornigerus Lyon 



and Casseday) Geol. Rep. Iowa, i, pt. ii, p. 576, PI. 9, figs. 12 a, b, c ; 



also Ibid., Supp., PI. 3, fig. 4; Meek and Worth., Lorycr, cornigems, Geol. 



Rep. 111., p. 380. Upper Burlington limest. Burlington, Iowa. 

 Syn. Actinocr. divaricatus Hall, 1860. Supp. Geol. Rep. Iowa, p. 11. 

 Syn. Actinocr. qninquelobus Hall, 1860. Supp. Geol. Rep. Iowa, p. 15 ; Meek 



and Worth. Dorycr. quinquelobus 1873. Geol. Rep. 111., v', p. 380. 

 *1860. Dorycr. deoornis Hall. (Actinocr. decornis) Supp. Geol. Rep. Iowa., p. 13. 



Burlington limest. Burlington, Iowa. 

 (This is a very doubtful species.) 

 1858. Dorycr. Gouldi Hall. (Actinocr. Gouldi) Geol. Rep. Iowa., i, pt. ii, p. 613, 



PI. 15, figs. 6 a, b; Meek and AVorth. Dorycr. Gouldi, lieol. Rep. III., v, p. 



380. Lower part of the Keokuk limest. Keokuk, Iowa. 

 1875. Dorycr. Kelloggi AVorthen, Geol. Rep. 111., vi, p. 513, PL 29, fig. 8. Keokuk 



limest. Keokuk, Iowa. 

 1853. Dorycr. mississippiensis Roemer. Type of the genus. Archir f. Naturgesch., 



Jahrg. xix. Band i, PI. 10, figs. 1, 2, 3 : Meek and Worth., 1S73, Geol. Rep. 111., 



V, p. 380. Keokuk limest. Iowa, Illinois, Tennessee, Kentucky and Missouri. 

 Syn. Actinocr. (Dorycr). mississippiensis var. spiniger Hall, 1860. Supp. 



Geol. Rep. Iowa., p. 54. (This is mertlv a young form.) 

 1858. Dorycr. missouriensis Shumard. (Actinocr. missouriensis) Geol. Rep. 



Missouri, by Swallow, pt. ii. p. 190, PI. A, figs. 4 a, b, c ; Meek and Worth. 



Dorycr, missouriensis, 1873. Geol. Rep. 111., v, p. 380. Upper Burl. 



limest. Palmyra, Mo. and Burlington, Iowa. (This species is very variable 



in the number of arms.) 

 Syn. Actinocr. desideratus Hall. Desc. New Sp. Crin. p, 2; Host. Journ. 



Nat. Hist., p. 273; Meek and Worth. Dorycr. desideratus, Geol. Rep. 111., 



V, p. 380. 

 *1855. Dorycr. parvus Shumard. (Actinocr. parvus) Geol. Rep. Mo., by Swallow, 



ii, p. 193, PI. A, fig. 9; Upper Burling'on limest. (not St. Louis limest. as 



quoted by Shumard), Palmyra, Mo. and Burlington, Iowa. 

 Syn. Actinocr. trinodus Hall, 1858. Geol. Rep. Iowa, i, pt. ii, p. 575. 

 Syn. Actinocr. symmetricus Hall, 1858. Geol. Rep., Iowa, i, pt. ii, p. 574, PI, 



9, figs. 8a, b; Meek and Worth., Dorycr. symmetricus 1873, (Jeol. Hep. 111., 



V, p. 380. 

 Syn. Actincor. (Amphoracr.) subturbinatus Meek and Worth., I860, Proc. 



Acad. Nat. Set. Phila., p. 388; Geol. Rep. 111., ii, p. 212, PI. 15, figs. 4 a, b. 



Dorycr. subturbinatus, 1873, Ibid., v, p. 380. 



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