62 Zoological Society. 



Long. 13, diam. 5^ mill. 



From Tortilla, Central America; in damp places. 

 Belongs, by the formation of the columella, to that aberrant group 

 of A. columna, Lattrei, aberrans, Dysoni, anomala, splendida, &c. 



18. Achatina Dysoni, Pfr. Ach. testd oblong o-conicd, tenuissimd, 

 glabra, pellucidd, nitidd, lutescenti- corned ; spird conicd, obtusius- 

 culd; suturd simplice ; anfractibus 5 convexiusculis, ultimo § lon- 

 gitudinis subcequante, deorsum subdilatato ; columelld arcuatim 

 tortd, subcallosd, vix truncatd ; aperturd angustd, acuminato- 

 oblongd, basi rotundatd ; peristomate simplice, tenui, margine 

 dextro medio antrorsum dilatato. 



Long. 9j, diam. 4 mill. 



From Honduras; found under decayed leaves by Mr. Dyson. 



19. Achatina sandwicensis, Pfr. Ach. testd ovato-conicd, o5- 

 lique striatd, subopacd, sordide corned ; spird conicd, obtusiusculd ; 

 suturd lined impressd marginatd ; anfractibus 6y planulatis, ultimo 

 ± longitudinis vix superante ; columelld arcuatd, plicato-iortd ; 

 aperturd laid, semiovali ; peristomate simplice, margine dextro 

 obtuso, columellari subreflexo, appresso. 



Long. 7, diam. 3|- mill. 



From the Sandwich Islands (B. W. Tucker, Esq.). 



20. Achatina (Glandina) Sowerbyana, Pfr. Ach. testd ovato- 

 fusiformi, tenuiusculd, diapkand, longitudinaliter confertim plicatd, 



striis spiralibus, ineequaliter distantibus decussato-granulatd,fulvo- 

 rubelld, strigis remotis, fuscis ornatd ; spird conicd, apice acutd ; 

 suturd albo-marginatd, crenulatd ; anfractibus 7y planiusculis , 

 ultimo -| longitudinis submquante ; columelld arcuatd, basi abrupte 

 truncatd; aperturd acuminato -oblong d -, peristomate simplice, mar- 

 ginibus callo tenui junctis , dextro repando. 



Long. 88, diam. 38 mill. 



From Totontepec, Mexico ; on decayed vegetable matter. 



21. Achatina (Glandina) isabellina, Pfr. Ach. testd fusi- 

 formi-oblongd, tenui, nitidd, sub lente spiraliter confertim striatd, 

 pellucidd, isabellina ; suturd lined impressd marginatd ; anfracti- 

 bus 6 convexiusculis, ultimo spird conicd, obtusd vix breviore ; 

 columelld obliqud, strictiusculd, supra basin aperturee elliptico- 

 oblonga breviter truncatd ; peristomate simplice, obtuso. 



Long. 26, diam. medio 10 mill. 



From Mexico ; found in decayed trunks of trees. 



22. Achatina (Glandina) tortillana, Pfr. Ach. testd subfusi- 

 formi-ovatd, soliduld, striis longitudinalibus, CG.fertis regulariter 



sculptd, nitidd, pellucidd, pallide corned, maculis et strigis opacis, 

 lactescentibus irregulariter signatd ; suturd submarginatd ; anfrac • 

 tibus 7\ convexiusculis, ultimo spiram conicam, obtusam, vix supe- 

 rante ; columelld fortiter arcuatd, supra basin aperture elliptico- 

 oblongce abrupte truncatd; peristomate simplice, obtuso, margine 

 dextro medio subdilatato. 



Long. 20, diam. medio 8 mill. 



From Tortilla, Central America; in damp places. 



