26o 



26. M. larvata, Conrad, Fossil Shells Tert. Form. U. S. 1st 



ed. p. 33, pi. 16, f. 7, Aug. 1833. 

 M. ovafa, Lea, Contrib. to Geol. p. 179, pi. 6, f. 191, Nov. 



1833. 

 M. semen (young). Lea, Contrib. to Geol. p. 179. pi. G, f. 190, 



Nov. 1833. 

 M. larvata, Conrad, Fossil Shells, Tert. Form. U. S. 2d ed. 



p. 45, pi. 16, f. 12, 1834. 

 VoJuteUa larvata, Conrad, Am. Journ. Conch, i, 25, 1865. 



Oliogocene ; Claiborne, Ala. 



27. M. limatula, Conrad. 



Porcellana limatula, Conrad, Journ. Ac. Nat. Sci. vii, 140, 



1834. 

 Marg. limatula, Conrad, Fossils Med. Tert. U. S. p. 86, pi. 



49, f. 11,* 1838. 

 Porcellana limatula, Tuomey and Holmes, Pleiocene Foss. S. 



C. p. 130, pi. 27, f. 10, 11, 1857. 

 Marg. limatula, Emmons, Rep. Geol. Surv. N. C. 1858, p. 



261, f. 134, 1858. 

 Porcellana limatula, Tuomey and Holmes, Post Pleiocene Foss. 



S. C. p. 78, pi. 12, f. 12, 1860. 

 Porcellana [Crlabella) limatula, Conrad, Cat. in Proc. Ac. Nat. 



Sci. 1862, p. 564, 1862. 

 Prunum limatula, Conrad, Am. Journ. Conch, iv, 67, pi. 6, 

 f. 5, 1868. 

 Miocene ; N. Carolina and S. Carolina. Post Pleiocene of S. 

 Carolina.'^ 

 M. MILIARIA, (Linn.) See among recent species. 

 M. MILIACEA, Dujardin (not Lam.), is 31. submiliacea, Orb. 

 M. MiNUTA, Pf. See among recent species. 

 M. MONiLis, (Linn.) See among recent species. 

 M. NANA, Conrad, Cat. in Append. Morton's Synops. is un- 

 described and unidentitied. 



28. M. nitidula, Desh., Coq. Foss. do Paris, ii, 709, pi. 95, f. 



10, il, 1824. 

 Desh. ed. Lam. Anim. sans Vert, x, 456, 1844. Desh. 

 Traite Elementaire, pi. 123, f. 13, ? 1850. Beyrich, 

 Conch. Nord-Deutsch Tert. Geb. p. 54, pi. 2, f. 11 a, b, 

 1853. Middle Eocene ; Paris Basin. 



* The text refers to fig. 9, but fig. 11 is evidently the one intended for 

 M. limatula. 



t There is much variation between the earlier and later deposits in the 

 size and development of the shell, and it must be confessed that it closely 

 approaches some of the forms now existing. Compare with M. roscida, 

 Redf., and the more robust varieties oi' 31. apicina, Menke. 



