Conchifera. \15 Thracia. 



subtruncata, Meek, Trans. Alb. Inst. vol. iv, p. 44. Vancou- 

 ver I. C. 

 taurica, Agas. Sp. (Coriomya), d'Orb. Prod. 74. Crimea. N. 

 vulvaria, Agas. Sp. (Coriomya), d'Orb. Prod. 74. G. N. 



TRIGONIA, Brug. 1791. 



abrupta, Von. Buch, Petr. Rec. En. Ainer. 17, 2, 21, 22. N. 



Gren. N. 



aliformis, Sow. M. Con. 215. E., Fr. U. G., G. 



alaeformis, Morton, not Sow. (thoracica), Jour. Acad. 1st s. 



vol. viii. 



aliformis, Goldf. Roem. Forbes, &c., not Sow. (limbata). 

 affinis, Sow. (sinuata), M. Con. 208. 



Archiaciana, d'Orb. P. F. 142, 290, 6-10. Fr., G. G. 



bipartita, d'Orb. Prod. 240. Fr. C. 



carinata, Agas. 1840, " Trigonies," 47, 8, 1. Fr. N. 



caudata, Agas. id. 32, 7, 1-3. Fr., G., Port. JV. 



cincta, Agas. (rudis), id. 27, 7, 21-23. 

 conformis, Agas. Trigon. pi. 9, f. 2-4. 



Constantii, d'Orb. P. F. 144, 294, 1-6. Fr., G. G. 



Coquandiana, d'Orb. P. F. 149, 249, 1-4. Fr. U. G. 



crenulata, Lam. An. S. Vert. vol. vi, p. 63. Fr. U. G. 



crenulata, Roem. (Mooreana), Kreid. Tex. 51, 7, 6.* 

 conocardiiformis, Krauss. Sp. (Lyrodon), Gabb, 1861. 



S. Africa. U. G. ? 



daedalea, Park. Org. Rem. pi. 12, f. 6. E., Fr. U. G 



Delafossei, Bayle & Coquand, M. G. S. F. vol. iv, 37, 8, 27. 



Chili. JV. 



disparilis, d'Orb. P. F. 157, 299, 3-4. Fr. C. 



divaricate, d'Orb. P. F. 135, 288, 1-4. Fr. JV. 



echinata, d'Orb. Prod. 240. Fr. C. 



elongata, Sow. pars, (carinata), M. Con. 431, f. 1-2 (exclus. 3). 

 elegans, Baily, Q. J. G. S. vol. xi, 461, 13, 3. S. Africa. U. G. ? 

 Emoryi, Con. Emory's Rep. 148, 3, 2. Texas. C. 



* After a careful comparison of Roeiner's figure and description with authentic 

 specimens and figures of Lamarck's species, I am convinced that they are different. 

 Besides the outline, the most obvious difference is in the number and arrangement 

 of the ribs. I take pleasure, therefore, in naming the species after my friend, 

 the able State geologist of Texas. 



