144 
Frocluctus hepar ? 
Strophomena antiquata, 
Fi'o ductus Inca, 
„ peruvianus. 
S. G-. Morton, 1836, Am. Jouru. Sci., XXIX, p. 153, pi. 26, 
fig. 39. 
Bronn., 1837, Lethsea Greogn., p. 86, pi. 2, fig. 14. 
A. d’Orbigny, 1844, Pal. Voyage Amerique merid., p. 51, pi. 4, 
fig. 2 et 3. 
Idem, 1841, ibid., p. 12, pi. 4. fig. 4. 
bolwiensis, 1 
Gaudryi, j 1814, ibid., p. 52, pi. 4, fig. 5, 6, 7, 8, 9. 
antiquatus, McCoy, 1847, Ann. Mag. X^at. Hist., XX, p. 235. 
seniiTCticulatus, E. de Verneuil, 1847, Bull. Soc. Geol. France, IV (2), p. 705. 
Sp. ? Christy, 1848, Letters on Geology, pi. 5, fig. 1. 
seniireticulatus , E. Boemer, 1852, In Bronu’s Lethsea Geogn., 2 Aufl., p. 378, 
pi. 2, fig. 14, und pi. 3, fig. 6. 
COra, H. D. Owen, 1856, Geol. Bepts. Iowa, Wisconsin, and 
Minnesota, p. 103, pi. 5, fig. 1 (non d’Orb). 
cequicostatus, Shumard, 1855, In Swallow’s Ann. Bept. Geol. Survey Missouri, 
I and II, p. 201, pi. C. fig. 10. 
sanireticulatus , J. Hall, 1856, In W. P. Blake’s Bept. Geol. Boute Mississipi 
Biver to the Pacific Ocean, p. 99, pi. 2, fig. 16, 17. 
Ivesii, J. S. Newberry, 1861, Ive’s Colorado Explor. Exped. Geol. 
Bept., p. 122, pi. 2. fig. 1-8. 
seiniTCticulatuS, E. Boemer, 1863, Zeits. Deutsch. Geol. Gesell., p. 590, pi. 16, 
fig. 2. 
,, T. Davidson, 1866, Quart. Journ. Geol. Soc., XXII, p. 43, pi. 2. 
fig. 12. 
sp. ? H. D. Bogers, 1868, Geol. Pennsylvania, II, Pt. 2, p. 833, 
fig. 687. 
seniireticulatus, J. W. Dawson, 1868, Acad. Geol., p. 297, fig. 97. 
,, E. Toula, 1869, Sitzung. Akad. Wissens. Wien, LIX, p. 441. 
,, E. Boemer, 1870, Geol. v. Ober-Schlesien, p. 90. 
L. G. de Koniiick, 1873, Beck. Anim. Eoss. Terr. Carb. Belg., 
II, p. 27 (for reference to the rest of the synonyms). 
O. D. Derby, 1874, Bull. Cornell Univ., I, No. 2, p. 47, pi. 4, 
fig. 8, pi. 6, fig. 18 and pi. 7, fig." 5, 6, 7, 15, 16. 
E. Toula, 1865, Neues Jahrb. fur Min., p. 234, pi. 6, fig. 1. 
Idem, 1875, Sitzung. K. Akad. Wissen. Wien, LXXI, p. 550. 
This species, the list of synonyms for which can he completed by 
reference to my Monograph on the genus to which it belongs, or to the second 
part of my Fecherches sur les Aniniaux fossiles, is so well known, and so 
