440 SYNOPSIS OF AMERICAN FOSSIL BRACHIOPODA. [bull. 87. 



Strophonella striata Hull. Niagara (Sil.). 



Strophomena striata Hall, Oeol. N. Y.; Rep. Fourth Diet., 1843, p. 104, lig. 3; — 



Twelfth Rep. N. Y. State Cab. Nat. Hist., 1859, p. 82. 

 Strophodonta striata Hall, Twenty-eighth Rep., Ibidem, 1879, p. 152, pi. 23, figs. 



l_p,;_Eleventh Rep. Indiana State Geol., 1882, p. 290, pi. 23, figs. 1-6.— Net- 



telroth, Kentucky Fossil Shells, Mem. Kentucky Geol. Survey, 1889, p. 149. 

 Lofta-na striata Hall, Fal. Ne\v York, II, 1852, p. 2.59, pi. 53, lig. 7. 

 Strophodonta (Strophonella?) striata Hall, Second Ann. Rep. N. Y. State Geol., 



1883, pi. 43, figs. 1-3. 

 Strophonella striata Beecher and Clarke, Mem. N. Y. State Mus., 1, 1889, p. 25, pi. 



3, figs. 1-8. 

 Strophomena hanoverensis Foerste, Proc. Boston Soc. Nat. Hist., XXIA'^, 1890, p. 



301, pi. 6, fig. 1. 

 Strophonella (Amphistrophia) striata Hall and Clarke, Pal. New York, VIII, Pt. 



I, 1892, p. 292, pi. 12, figs. 1-3. 

 Strophomena (Orthothetes) hanoverensis Foerste, Geol. Ohio, VII, 1895, p. 567, 



pi. 27, fig. 34; pi. 31, fig. 1. 

 Loc. Lockport, New York ; Waldron and Hanover, Indiana ; Louisville, Kentucky. 



Syntrielasma Meek and Worthen=Enteletes. 



SYNTROPHIA Hall and Clarke. Genotype Triplesia lateralis Wbittield. 



Syntrophia Hall and Clarke, Pal. New York, VIII, Pt. I, 1892, p. 270;— Ibidem, 



Pt. II, 1893, p. 216;— Thirteenth Ann. Rep. N. Y. State Geologist, 1895, p. 836. 



Syntrophia arachne (Billings). Upper Cambrian. 



Stricklandia? arachne Billings, Pal. Fossils, I, 1862, p. 85, tig. 77. 

 Syntrophia arachne Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 216. 

 Loc. Point Levis, Canada. 



Syntrophia arethusa (Billings). Upper Cambrian. 



Stricklandinia? arethusa Billings, Pal. Fossils, 1, 1862, p. 85, fig. 78. 

 Syntrophia arethusa Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, p. 216. 

 Loc. Point Levis, Canada. 



Syntrophia (?) armanda (Billings). Upper Cambrian. 



Orthis? armjvuda Billings, Pal. Fossils, I, 1865, p. 303, fig. 293.— Hall and Clarke, 

 Pal. New York, VIII, Pt. I, 1892, p. 217. 



Loc. Phjllipsburg, Canada. 



Ohs. This species may prove to be a Billingsella. In the interior of the ventral 

 valve " the dental plates seem to form an imperfect triangular chamber" 

 (Billings). If there is present a true spondylium and the foramen is "appar- 

 ently open" O. armanda will prove to be more nearly related to Syntrophia 

 than to any other genus. If, however, there is present only an imperfect 

 triangular chamber and the foramen closed by a deltidium, then the species 

 is probably a Billingsella. 



Syntrophia barahuensis (A. Winchell). Ui^per Cambrian. 



Orthis barahuensis A. Winchell, American Jour. Sci., 2d ser., XXXVII, 1864, j). 228. 

 Lepta»na barahuensis Whitfield, Ann. Rep. Geol. Survey Wisconsin, 1877, p. 60; — 



Geol. Wisconsin, IV, 1882, pp. 171, 195, pi. 1, figs. 6, 7; pi. 3, fig. 6. 

 Syntrophia barahuensis Hall and Clarke, Pal. New York, VIII, Pt. II, 1893, 



p. 216. 

 Loc. Near Baraboo, Wisconsin. 



Syntrophia calcifera (Billings). Upper Cambrian. 



Camarella calcifera Billings, Canadian Nat. Geol., A'l, 1861, p. 318, fig. 3; — Geol. 

 Canada, 1863, p. 231, fig. 247;— Pal. Fossils, I, 1865, p. 220.— Meek, Sixth 

 Ann. Rep. U. S. Geol. Survey Terr., 1873, p. 464. 



