1204 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



Streptelasma radicans Hall. 



Streptelasma radicans Hall, 28th Rep. New York State Mus. Nat. Hist., doc. ed., 



1877, pi. 5, figs. 1-4; mus. ed., 1879, p. 106, pi. 5, figs. 1-4; llth Ann. Rep. 



Indiana Dep. Geol. Nat. Hist., 1882, p. 226, pi. 4, figs. 1-4. Lesley, Ceol. 



Surv. Pennsylvania, Rep. P 4, 1890, p. 1087, figs. 

 Zaphrentis radicans Davis, Kentucky Foss. Corals, Geol. Surv. Kentucky, pt. 2, 



1885, pi. 132, figs. 11-13. 

 Niagaran: Waldron, etc., Indiana; Newsom, Tennessee (Waldron); Louisville, 



Kentucky (Louisville). 



Streptelasma robustum Whiteaves. 



Strep telasmacorniculum? Whiteaves, Geol. Surv. Canada, 1879-80, Rep. Progress, 



1881, p. 57c. 

 Streptelasma robustum Whiteaves, Canadian Rec. Sci., 6, 1895, p. 390; Pal. Foss., 



Geol. Surv. Canada, 3, pt. 3, 1897, p. 153, pi. 18, figs. 1, la. Lambe, Cont. 



Canadian Pal., Geol Surv. Canada, 4, pt. 2, 1901, p. 109, pi. 7, fig. 1; Cruise 



of the " Neptune," App. 4, 1906, p. 325. 

 Richmond: Red River Valley, Lake Winnipeg, and Southampton Island, Hudson 



Bay, Canada. 



Streptelasma rusticum (Billings). 



Petraia rustic a Billings, Canadian Nat. Geol., 3, 1858, p. 422; Geol. Surv. Canada, 



Rep. Progress, 1858, p. 168. 



Zaphrentis rustica Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 106. 

 Streptelasma rusticum Miller, N. A. Geol. Pal., 1889, p. 205. Whiteaves, Geol. 



Surv. Canada, Pal. Foss., 3, pt. 2, 1895, p. 113 (loc. occ.). Winchell and Schu- 



chert, Geol. Minnesota, 3, pt. 1, 1895, p. 93, pi. G, figs. 22, 23. Lambe, Cont. 



Canadian Pal., Geol. Surv. Canada, 4, pt. 2, 1901, p. 110, pi. 7, figs. 2, 2a, 3. 



Nickles, Amer. Geol., 32, 1903, p. 207. Whiteaves, Geol. Surv. Canada, Pal. 



Foss., 3, pt. 4, 1906, p. 342. Grabau and Shimer, N. A. Index Fossils, 1, 1906, 



p. 55, fig. 76e-f . Cumings, 32d Ann. Rep. Dep. Geol. Nat. Res. Indiana, 1908, 



p. 708, pi. 2, figs. 2, 2b. 

 Petraia Canadensis Billings, Geol. Canada, Geol. Surv. Canada, 1863, p. 208, 



fig. 205. Lesley, Geol. Surv. Pennsylvania, Rep. P 4, 1889, p. 627, fig. 

 Zaphrentis Canadensis Billings, Pal. Foss., 1, Geol. Surv. Canada, 1865, p. 105, 



fig. 93a-c (adv. sheets, 1862). Hall, 35th Rep. New York State Mus., 1884, pi. 



16, figs. 1-3. 

 Streptelasma vagans Foerste, Bull. Sci. Lab. Denison Univ., 14, 1909, p. 305, pi. 



11, figs. la-c. 

 Zaphrentis corniculum Davis, Kentucky Foss. Corals, Geol. Surv. Kentucky, pt. 



2, 1885, pi. 132, figs. 1-3; pi. 138, fig. 8. 

 Streptelasma corniculum Edwards and Haime (not Hall), Mon. Poly. Foss. des 



Terr. Pal., 1851, pi. 7, fig. 4. Nicholson, Pal. Ohio, 2, 1875, p. 208. Romin- 



ger, Geol. Surv. Michigan, 1876, p. 141, pi. 51, upper row. Hall, llth Rep. 



State Geol. Indiana, 1882, p. 376, pi. 51, figs. 2-4. Nicholson, Manual of Pal., 



1, 1889, p. 247, fig. 127b; pp.278, 279, figs. 156a-b; p. 280, fig. 157; p. 297, 



figs. 178a, 178b. 

 Richmond: Snake Island, Lake St. John, Canada. Widespread and abundant in 



all divisions of the Richmond in the United States and Canada. 



STREPTELASMA RUSTICUM var. TRILOBATUM Whiteaves. See Streptelasma latusculum 

 trilobatum. 



Streptelasma selectum (Billings). 



Petraia selecta Billings, Canadian Nat. Geol., n. s., 2, 1865, p. 429; Cat. Sil. Foss. 

 Anticosti, Geol. Surv. Canada, 1866, p. 7, 33. 



