NiCKLEs AND BAS9LER.] CATALOGUE OF GENERA AND SPECIES. 171 



Arthropora shafferi (Meek). 



1872. Ptilodictya (Stictopora) Shafferi. Meek, Proc. Acad. Nat. Sci. Philadel- 

 phia, p. 317. 



187:5. Ptilodictya (Stictopora) Shafferi. Meek, Pal. Ohio, I, p. 69, \)\. v. l^r-r-. 



1875. Ptilodictya Shafferi. Nicholson, Pal. Province Ontario, p. 33, fig. 4. 



1882. Arthropora shafferi. Ulrich, Jour. Cincinnati Soc. Nat. Hist.,V, p. 107, 

 pi. vii, 10, 10(1. 



1889. Arthropora shafferi. ]\Iiller, North American Geol. Pal., figs. 458-455 



(p. 293). 



1890. Arthropora shafferi. Ulrich, Geol. Surv. Illinois, VIIT, fig. 3c' (p. 308). 

 1879. Crateripora erecta. Ulrich, Jour. Cincinnati Sot;. Nat. Hist., II, p. 29, 



pi. vii, 29, 29a. • 

 1879. Stromatopora (?) lichenoides. James, Paleontologist, No. 3, p. 18. 

 Cincinnati (Lorraine): Cincinnati, Ohio, and vicinity. 

 Obs. The names Crateripora erecta Ulrich and Stromatopora (?) lichen- 

 oides Jamea were applied to the articulating basal socket of this species 

 before its true nature was understood. 



Arthropora shafferi-cleavelandi (James). 



18S1. Ptilodictya cleavelandi. James, Paleontologist, No. 5, p. 38. 

 1881. Ptilodictya? cincinnatiensis. James, Paleontologist, No. 5, p. 39. 

 1881. Ptilodictya grahami. James, Paleontologist, No. 5, p. 39. 



1881. Ptilodictya dubia. James, Paleontologist, No. 5, p. 40. 

 Cincinnati (Utica): Cincinnati, Ohio, and vicinity. 



Arthropora simplex Ulrich. 



1886. Arthropora simplex. Ulrich, Fourteenth Ann. Rep. Geol. Nat. Hist. Surv. 



Minnesota, p. 65. 

 1893. Arthropora simplex. Ulrich, Geol. Minnesota, III, p. 177, pi. xiv, 12-21. 



Trenton (Stones River and Black River): Minneapolis, St. Paul, and 



Fountain, Minnesota; Decorah, Iowa. 



ARTHROSTYLUS Ulrich. Genotype: Helopora tenuis James. 



1882. Arthronema (preoccupied). Ulrich, Jour. Cincinnati Soc. Nat. Hist., Y, 



pp. 151, 160. 



1888. Arthrostylus. Ulrich, American Geologist, I, p. 230. 



1889. Arthrostylus. Miller, North American Geol. Pal., p. 293. 



1890. Arthrostylus. Ulrich, Jour. Cmcinnati Soc. Nat. Hist., XII, p. 188. 

 1890. Arthrostylus. Ulrich, Geol. Surv. Illinois, VIII, p. 400. 



1893. Arthrostylus. Ulrich, Geol. Minnesota, III, p. 187. 



1896. Arthrostylus. Ulrich, Zittel's Textb. Pal. (Engl. ed. ), p. 280. 



1897. Arthrostylus. Simpson, Fourteenth Ann. Rep. State Geologist New York 



for the year 1894, p. 527. 



Arthrostylus conjunctus Ulrich. 



1890. Arthrostylus conjunctus. Ulrich, Jour. Cincinnati Soc. Nat. Hist., XII, 



p. 189, fig. 14. 

 1893. Arthrostylus conjunctus. Ulrich, Geol. Minnesota, III, p. 188, pi. iii, 13, 14. 

 1897. Arthrostylus conjunctus. Simpson, Fourteenth Ann. Rep. State Geologist 



New York for the year 1894, figs. 78, 79, 79^/ (p. 526). 

 Trenton (Black River) : Fountain, Minnesota. 



Arthrostylus curtus (Ulrich). 



1882. Arthronema curtum. Ulrich, Jour. Cincinnati Soc. Nat. Hist., Y, p. 161, 



pi. vi, 9. 

 1889. Arthrostylus curtus. Miller, North American (Jeol. Pal., p. 293. 

 Cincinnati (Utica): Covington, Kentucky. 

 Obs. This may he a basal segment of some si)ecies of Arthropora. 



