OCR Text |
Show 1879.] MOLLUSCA OF COSTA RICA. 479 a smaller lip and is of a brown colour, with distant white longitudinal zones. Another of the same group is B. lilacinus, Rve., also from " Central America," which is white, with violet columella; and still another is B. liliaceus, Guild., which is from the West Indies, and is a less solid shell, more contracted, with the aperture less rounded at the base, has a pink tinge, and a much smaller umbilicus, and the outer lip not nearly so much expanded as in B. zhor-quinensis. 12. BULIMUS CITRONELLUS, n. sp. (Plate XL. fig. 5.) Shell elongately ovate, minutely perforated, rather thin, very finely and closely transversely sculptured with delicate impressed striae, pale yellow or citron-colour throughout; whorls 7, flatly convex ; apex conical; sutures impressed, white ; aperture ovate; outer lip thin, slightly expanded towards the base ; columella triangularly flattened over the perforation. Diam. 6, alt. 12 lin. Hab. " liven to Lipurio, low hills" (Gabb). " Animal white ; upper tentacles very long ; arboreal" (Gabb). Only two specimens. 13. BULIMUS MACULATUS, Lea, Trans. Am. Phil. Soc. 1839, p. 86, pi. 22. fig. 112. Costa Rica. The specimen in the British Museum is from Chiriqui Mountain, " Central America." A small elongate species, pale yellow, banded with light and dark purplish brown. 14. BULIMUS CORNEUS, SOW. Shell rimate, ovate, rather thin, irregularly finely obliquely striated, pale brown throughout; whorls 6, moderately convex; spire equal in length to the aperture ; sutures impressed; aperture ovate; outer lip thin, simple ; columellar, margin slightly expanded over the perforation ; margins united by a thin callus. Diam. 5, alt. 9 lin. Hab. Tilorio and Zhorquin rivers" (Gabb). " Animal small, yellowish white; tail does not reach to the apex of the shell; tentacles short, dark" (Gabb). A small species of simple aspect, of a uniform pale-brown colour, allied to B. behrendti, Pfr. 15. GLANDINA LIGNARIA, Reeve. Achatina lignaria, Reeve, Conchol. Icon. Achatina, pi. 8. fig. 27 (1849). Glandina sowerbyana, form A, Strebel, Mexik. Land- und Siissw.- Conch. ii. Taf. v. figs. 10 a, 10 b. Euglandina lignaria, Crosse et Fischer, Expe*d. Scient. du Mexique, Mollusca, pi. 3. fig. 1. Two specimens found. |