AMERICAN OPEAS. 193 



2. 0. MICRA (Orbigny). PI. 27, figs. 49, 56-57. 



Shell elongate, turriculate, thin, translucent, very strongly 

 striated with small sharp and raised ribs : nearly umbilicate ; 

 spire long, nearly conic, with the end obtuse, composed of 8 

 not much r.ounded whorls; aperture oval, with sharp margins; 

 columella straight. Color yellowish-white. Length 6, diam. 

 2.5 mm. This species is especially related to B. clavulus but 

 differs chiefly by its raised ribs. (Orb.). 



Bolivia : easternmost foothills of the Bolivian Andes, not far 

 from Santa Cruz de la Sierra, under stones (Orbigny, type 

 loe.). Brazil: Rio de Janeiro (Orb.) ; Fernando Noronha I.; 

 Para (Hubbard). Colombia at Honda (T. Bland). Trini- 

 dad (Guppy). 



Central America and Mexico: Polvon, Nicaragua (McNiel) ; 

 Utilla L, Honduras (Simpson) ; Progreso, Izamal, Ticul, Tun- 

 kas and Tekanto, Yucatan (Heilprin exped.) ; San Juan Bau- 

 tista, Tabasco (Rovirosa) ; Vera Cruz Heilprin exped.) ; 

 San Rafael Jicaltepec (Towmsend) ; Antigua and Texolo, 

 V. C. (Rhoads). 



West Indies: Grenada, Grenadines, Barbados, St. Vincent, 

 Guadeloupe, Antigua, St. Eustatius, St. Bartholomew, St. 

 John, St. Thomas, St. Croix, Porto Rico, Haiti, Cuba and 

 Jamaica. Also reported by Tate from St. Lucia. 



Florida: Miami. 



Introduced in Bermuda (Heilprin!), Charleston, S. C. 

 (Binney), Mauritius (Nevill!). 



Helix micro, ORB., Mag. de Zool. 1835, p. 9. Bulimus micra 

 ORB., Voy. Amer. Merid. Moll., p. 262, pi. 41, f. 18, 19, 20. 

 PFR., Monogr. ii, 165 iii, 400 ; iv, 462 ; vi, 100. REEVE Conch. 

 Icon, v, pi. 14, f. 78; pi. 79, f. 579 (Chilon, Bolivia) .Opeas 

 micra Orb., SMITH, Proc. Malac. Soc. Ixmd. i, p. 309, 318, 322 

 (St. Vincent, Grenada, Grenadines) ; Journ. of Conch, viii, p. 

 237 (Trinidad). 



Bulimus octonoides C. B. ADAMS, Proc. Boston Soc. Nat. 

 Hist. 1845, p. 12 (Jamaica). REEVE, Conch. Icon, v, pi. 84, f. 

 593. PFR., Monogr. ii, 160; iii, 400; iv, 460; vi. 99. Steno- 

 gyra octonoides MAZE, Journ. de Conch. 1883, pp. 6, 41 (Guad- 

 eloupe). BINNEY, Terrestrial Moll, v, p. 194, Man. Amer. 



