638 . SUPPLEMENT. 
10. Opeas patzcuarense. 
Opeus patzcuarense, Pilsbry, Proc. Acad. Phil. 1899, p. 399°. 
Minute, slender, slowly tapering, glossy and smooth. 
Long. 3, diam. 0°8 millim. Whorls 73. : 
Hab, Cuntrau Mexico: Patzcuaro, State of Michoacan (Mr. & Mrs. Rhoads‘). 
11. Opeas odiosum. 
Opeas odiosum, Pilsbry, Proc. Acad. Phil. 1899, p. 899°. 
Slender, turrited, completely imperforate, translucid, glossy, irregularly scored by unequally spaced longi- 
tudinal grooves, which are similar in character to those of Hyalinia indentata. 
Long. 6-9, diam. 2, apert. 1-5 millim. Whorls 83. 
Hab. Cuntrau Mexico: Patzcuaro (Mr. & Mrs. Rhoads 1). 
12. Opeas rhoadse. 
Opeas rhoadse, Pilsbry, Proc. Acad. Phil. 1899, p. 399°. 
Similar in sculpture and colour to the preceding (O. odiosum), also wholly imperforate, but perceptibly more 
slender in the spire, with smaller apex. 
Long. 7, diam. 1°7-1-9, apert. 1:6 millim. Whorls 9-94. 
Hab. N.E. Mexico: Diente, near Monterey, State of Nuevo Leon (Mr. & Mrs. 
Rhoads"), ; 
SUBULINA (p. 296). 
Subulina octona (p. 298). 
To the localities given, add :— 
Hab. [E. Costa Rica :] Moin Hill, near Limon (Pittier). 
[S.W. Costa Rica:] middle part of the Rio Pacuare del Sur, thermal springs of 
Djiri-Durunia, 800 metres, and valley of Baia (Pittier). 
Var. trochlea (p. 299). 
Rumina (Subulina) trochlea, Pilsbry, Proc. Acad. Phil. 189] » p. 318”, 
To the localities given, add :— 
Hab. [Yucatan :] Izamal (Heilprin 29). 
Pilsbry agrees with me in treating S. trochlea as a variety of &. oetona. 
PSEUDOSUBULINA (p. 301). 
Pseudosubulina berendti (p. 301). 
Var. occidentalis. 
Pseudosubulina berendti, var. occidentalis, Pilsbry, Proc. Acad. Phil. 1899, p. 398 °, 
Distinguished by the weaker, less crowded rib-strie and wider aperture. 
Long. 127-15, diam. 2:8-3-2, apert. 2:8-3 millim. Whorls 114-12. 
Hab. W. Mexico: Uruapam, State of Michoacan (Mr. & Mrs. Rhoads *). 
