1879.] MOLLUSCA OF COSTA RICA. 479 



a smaller lip and is of a brown colour, with distant white longi- 

 tudinal zones. Another of the same group is B. lilacinus, live., 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 strise, 

 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. " Uren to Lipurio, low hills" (Gabb). 



" Animal white ; upper tentacles very long ; arboreal " (Gabb). 



Only two specimens. 



13. Bulimus maculatcs, 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 6. 



Euglandina lignaria, Crosse et Fischer, Expe'd. Scient. du 

 Mexique, Mollusca, pi. 3. fig. 1. 



Two specimens found. 



