Conchifera. Mactra. 



atigulata, Sow. G. T. vol. iv, pi. 16, f. 9. E. U. G. 



Araucana, d'Orb. Yoy. Astrol. pi. 5, f. 2-4. Chili. 0. 



Carteroni, d'Orb. P. F. 367, 368, 6-9. E., Fr. N. 



Chiliensis, Gabb, 1860, Proc. Acad. 198, 3, 5. Chili. C. 



Cecileana, d'Orb. Am. Merid. 126, 15, 5-6. Chili. C. 



Dupiniana, d'Orb. P. F. 367, 368, 3-5. Fr. JV. 



formosa, M. & H. 1856, Proc. Acad. 271. Neb. C. 



Gaultina, P. & K. Env. Genev. 407, 29, 3. Fr. G. 



gracilis, M. & H. 1860, Proc. Acad. p. 179. Neb. C. 

 intersecta, Forbes, Sp. (Carduim), d'Orb. Prod. 235. India. C. 



Matronensis d'Orb. P. F. 366, 368, 1-2. Fr. N. 

 porrecta, Gein. Quader. G. 



Siouxensis, M. & H. 1860, Proc. Acad. 179. Neb. C. 



substriata, d'Orb. Prod. 75. E. JV. 



Texana, Con. 1856, Proc. Acad. p. 269. Tex. 0. 

 tripartita, Sow. in Forbes, G. T. vol. vii, 142, 15, 17. India, C. 



Warrenana, M. & H. 1856, Proc. Acad. p. 271. Neb. C. 



Mactromya, Ag. 1842. 

 Couloni, Ag. (DONACILLA), Etud. Grit. 195, 10, 6-14. 



^_ MERETRIX, Lam. 1799 (Cytherea, Lam. 1805). 



Deweyi, M. & H. (Cytherea), 1860, Proc. Acad. p. 185. Neb. C. 



juunda, Duj. Sp. " Gabb, 1861. Fr. C. 



lineolata, Sow. Sp. " " " E. U. G. 



Leonensis, Con. Sp. " " " Texas. C. 



Lamarensis, Shum. Sp. " " " Texas. C. 



Missouriana, Morton, Sp. (Cytherea), Gabb, 1861. Mo. C. 



Nebrascensis, M. & H. Sp. " " " Neb. C. 



orbiculata, M. & H. " 1860, Proc. Acad. p. 



185. Neb. a 



Owenana, M. & H. " id. p. 185. Neb. <7. 



pellucida, M. & H. " id. p. 185. Neb. C. 



subrotunda, Sow. Sp. " Gabb, 1861. E. U. G. 



therefore bears date 1767. It was, however, very much wider in its range than 

 when, in 1799, Lamarck restricted it to the true Madras. But, in 1778, Hum- 

 phreys applied the name TRIGONELLA to the genus. Still, Linnaeus ; s name being 

 the oldest, must be retained under the more restricted sense, and thus Trigonella 

 becomes a synonym. 



