117 
29. AcHATINA (OLEACINA) BINNEYANA, Pfr. 4. testa fusi- 
Sormi, tenui, confertim plicata, parum nitente, carnea, strigis va- 
ricosis castaneis irregulariter notata ; spira conica, apice acutius- 
cula; sutura marginata et eleganter crenulata ; anfr. 74 parum 
convexis, ultimo spira paulo longiore, basi attenuato ; columella 
leviter arcuata, ad basin aperture verticalis, lanceolate late trun- 
cata ; perist. simplice, tenui. 
Long. 91, diam. 33 mill. 
Hab. 2 
30. CyLINDRELLA CHORDATA, Pfr. C. testa vix rimata, cylin- 
draceo-turrita, truncata, tenera, subtilissime striata et costulis 
chordeformibus, subdistantibus munita, albida; sutura costis ex- 
currentibus crenata; anfr. superst. 11-12 vix convexiusculis, ul- 
timo antice soluto, breviter descendente, latere dextro angulato, 
basi acute carinato ; carina filiformi, crenata; apertura obliqua, 
subtetragono-rotunda ; perist. albo, continuo, undique breviter ex- 
panso. 
Long. 10, diam. 23 mill. 
Hab. St. Croix, West Indies. 
31. Prerocycios Birrons, Pfr. Pt. testa umbilicata, discoidea, 
solida, superne arcuato-striatula, nitida, purpurascenti-castanea ; 
spira plana, vertice subtili, lucide castaneo ; sutura alba ; anfr. 6 
convexis, ultimo latiore, peripheria obsolete angulata, antice de- 
scendente et juxta suturam prominentiam fornicatam formante, 
basi violaceo ; apertura diagonali, subcirculari; perist. duplicato, 
incrassato ; interno superne sulco triangulari interrupto, externo 
subpatente, superne producto et in prominentiam anfractus ultimi 
abeunte. 
Diam. maj. 25, min. 214, alt. 8 mill. 
Hab. Ceylon.. 
32. CycLosroma (CycLorus) IRREGULARE, Pfr. C. testa um- 
bilicata, turbinato-depressa, solida, confertim striata, fulvida ; 
spira breviter turbinata, acutiuscula; sutura profunda; anfr. 5 
convexis, ultimo superne turgido, ad suturam late canaliculato, 
infra medium fascia lata fusca notato, circa umbilicum infundibuli- 
Sormem, intus valide plicatum subanguloso ; apertura obliqua, sub- 
triangulari-ovali, superne angulata; perist. continuo, breviter ad- 
nato, recto, margine dextro dilatato, columellari incrassato, leviter 
arcuato, ad basin canaliculato. 
Diam. maj. 37, min. 30, alt. 19 mill. 
Hab. Costarica, Central America. 
33. CycLosroma (CycLotus) BOGOTENSE, Pfr.  C. testa umbi- 
licata, turbinato-depressa, tenuiuscula, malleato-punctata, nitida, 
Jusco-viridi ; spira parum elata, apice obtusiuscula, albida ; anfr. 
43 convevis, rapide accrescentibus, ultimo terete, peripheria linea 
albida cingulato, circa umbilicum mediocrem, conicum pallido ; 
apertura parum obliqua, subcirculari, superne vix angulata; perist. 
