HELICINA §. 7. 8. 
369 
vexi, ultimus rotundatus, non descendens, basi juxta callum 
columellarem circumscriptum profunde impressus ; columella 
simplex, recedens; apertura ampla, semicircularis ; perist. sim- 
plex, tenue, expansiusculum, margine dextro infra insertionem 
quasi in alam latiusculam producto. — Operc. ? — Diam. 
maj. 9, min. vix 8, alt. 7'/ 2 mill. (Mus. Cuming, et Menke.) 
Helicina alala Menke mss. 
— — Pfr. in Zeitschr. f. Malak. 1848. p. 87. 
— — Chemn. ed. II. N. 54. p. 43. t. 5. f. 18 — 20. 
— pannucea Morelet Test, noviss. I. p. 21. N. 52. tt ) 
Habitat San Luis in provincia Peten reipublicae Guatemalen- 
sis (Morelet), Mexico? (Menke.) 
§• 8. 
67. H. sinuosa Pfr. 630 
T. globoso - conica , solida, concentrice tenuiter striata, 
opaca, alba; spira conica, acuta; sutura impressa; anfr. 6V 2 
plani, ultimus subcarinatus, basi convexiusculus ; apertura ver- 
ticalis, sinuoso-triangularis ; columella brevis, planata, basi in 
nodum dentiformem desinens, callum tenuem emittens ; perist. 
incrassatum, expansum, margine dextro repando, ascendente, 
cum tuberculo calloso in carina anfr. penultimi sinum for- 
mante. — Operc.? — Diam. maj. 16, min. 13V 2 , alt. 11 mill. 
(Mus. Cuming.) 
Helicina sinuosa Pfr. in Zeitschr. f. Malak. 1850. p. 191. 
— — Chemn. ed. II. N. 94. t. 10. f. 7. 8. 
Habitat in republica Mexicana? 
68. II. Lanieriana Orbigny. 63 1 
T. globoso-turbinata, tenuis, irregulariter oblique et con- 
fertim concentrice striata , vix nitidula , pallide lutea ; spira 
conica, acute mucronata; anfr. 7, primi plani, penultimus 
convexiusculus, ultimus subrotundatus, peripheria obsoletissime 
angulatus; columella brevis, stricta, recedens, callum tenuem 
retrorsum emittens ; apertura obliqua , ovali - sub triangularis ; 
*) T. ovato-depressa, subtus convexiuscula, obtuse carinata, sub epider- 
mide membranacea transversim lamelloso - cornea , levis ; anfr. 5 planulati ; 
apertura semilunaris; perist. subincrassatum , acutum, pone suturam emar- 
ginatum, eallo crassiusculo aperturam integram fingente. — Diam. maj. 11, 
min. 9 mill. (Moreiet 1. c.) 
24 
