112 APPENDIX. 



ACHATINA NYSTIANA Pfr. Shell fusiform-oblong thin, 

 smoothish, very delicately striatulate, pellucid, glossy, flesh- 

 colored. Spire long, slender, the apex obtuse, suture thread- 

 margined, whorls 6 l /2, a little convex, the last about three- 

 sevenths the total length, tapering at base. Columella very 

 lightly arcuate, the base shortly and horizontally truncate. 

 Aperture scarcely oblique, oval-elliptical, peristome simple, 

 thin. Length 47, diam. 12, aperture 16y 2 x 6 mm. Habitat 

 unknown, Mus. Cuming (Pfr., P. Z. S. 1855, p. 100; and as 

 Oleacina n., Monogr. iv, 632). Evidently an Euglandina. 



GLANDINA CRENULATA Sow. Ant., Pfeiffer. Shell fusiform 

 ovate, rather solid, reddish-corneous, glossy; spire with the 

 apex obtuse. Whorls 6~y 2 , a little convex, the last descending, 

 shorter than the spire; suture margined and most minutely 

 crenulate. Aperture dilated below, columella subarcuate, 

 strongly truncate; peristome simple. Length 24, diam. 11, 

 aperture 11 mm. long. Central America. (Pf?-, Symbolae 

 ad Hist. Hel. ii, p. 59, no. 273, 1842, from spec, in coll. An- 

 ton, recorded without description in Anton's Verzeichniss as 

 Achatina crenulata Sow.? p. 44, no. 1595. "Achatina crenu- 

 lata (Sowerby?) Anton," PFR., Monogr. ii, p. 285). Seems 

 to be unknown to monographers of the Mexican fauna. It 

 is not recognizably denned. 



POIRETIA. 



A list of species referable to this genus was given in Vol. 

 XIX, pp. xxii-xxv. The preparation of an index of Achatina 

 etc. has shown that several names are homonyms and require 

 change, as follows. 

 POIRETIA KLEINIANA Pilsbry, n. n. 



New name for Achatina elegans Klein, Jahreshefte des 

 Vereins fur vaterlandische Naturkunde in Wurttemberg, ix, 

 1853, p. 214, pi. 5, f. 11, not A. elegans C. B. Ad. 1849. 

 Cf. Vol. XIX, p. xxiv. 



POIRETIA INPLATA Reuss, (XIX, p. xxiv). Add the 

 synonym: Olandina (Achatina) antiqua KLEIN, Jahresh. 

 Wiirttemb. VIII, p. 162, pi. 3, f. 9, 1852. 



