296 MOLLUSCA. 
right in adding a note of interrogation to his description in vol. iii. p. 400 of his 
monograph, but wrong in omitting it in the later volumes. The figures on our Plate 
represent the most slender and the most robust of the specimens found at Teapa by 
H. H. Smith. 
The name “micra” is properly an adjective and feminine, and d’Orbigny retained 
the feminine form when referring it to Budimus in his later work, although this name 
is masculine; and so it may be also maintained in the neuter Opeas, regarding it asa 
case of apposition, “the female little one,” in order to avoid the use of the terms 
micrum or micron. 
8. Opeas (?) tryonianum. 
Bulimus tryonianus, Tate, Amer. Journ. of Conch. v. p. 157, t. 16. fig. 4 (1870)’; Pfr. Monogr. 
Helic. Vivent. vii. p. 189. 
Hab. N. Panama: on an island in the lagoon of Bocas del Toro, in the forest 
(Tate} ). 
Var. subovale,n. (Tab. XVII. fig. 12.) 
A little more ovate; umbilicus narrow, but not closed. 
Hab. S.W. Cosra Rica: Turubanes, at an elevation of 500 metres above the sea (volley). 
9. Opeas (?) semistriatum. 
Bulimus semistriatus, Morelet, Test. Noviss. ii. p. 10 (1851)*; Pfr. Monogr. Helic. Vivent. in. 
p- 441 °. 
Bulimulus semistriatus, Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. p. 555, t. 20. figg. 14, 15 °. 
Hab. S.E. Mexico: Palenque, in woods (Morelet 1~*). 
Although placed by the learned French authors in the genus Bulimulus, it seems to 
me to be nearer related to O. micra. 
SUBULINA. 
Achatina, subgen. Subulina, Beck, Index Moll. p. 76 (1837) ; Albers, Die Helic. ed. 1, p. 195. 
Stenogyra, sect. Subulina, Shuttleworth, in Mittheil. nat. Ges. Bern, 1854, Diagn. neuer Moll. no. 6, 
p- 188; Albers, Die Helic. ed. 2, p. 266. 
Subulina, Fischer & Crosse, Miss. Scient. Mex., Mollusca, i. p. 626 (part.) ; Strebel, Beitr. Mex. 
Land- und Siissw.-Conch. v. p. 114. 
Shell cylindrically turrite, imperforate ; columellar margin distinctly notched at the 
base; apex generally rather thick, globose; sculpture feeble. Lateral teeth of the 
radula tricuspidate, the middle cusp the longest. 
For the living animal and the anatomy, see the quoted works of Fischer, loc. cit. 
pp. 628-630, t. 28. figg. 1-7, and Strebel, loc. cit. p. 115, t. 18. 
