81 
continuum, album, breviter reflexum, superne subangula- 
tum. — Long. 46, diam. 15 mill. Ap. c. perist. oblique 
12 mill. longa, 10 lata. 
Hab. Sacatepec reipublicae mexicanae. (Boucard.) 
76a. Cylindrelta arctispira Pfr. 
T. rimata, eylindraceo -turrita, late truncata, solidula, 
confertim subarcuato-costata, subopaca, albida: sutura pro- 
funda, subnodulosa; anfr. superst. 18, arcte voluti, convexi, 
ultimus angustior, filocarinatus, antrorsum breviter protra- 
etus; apertura parvula, obliqua, oblique ovalis; perist. con- 
tinuum, nitidum, undique breviter reflexum, margine sinistro 
lateraliter producto. — Long. 38, diam. 10 mill. Ap. ob- 
lique 62/, mill. longa, 6 lata. 
Hab. Juquila reipublicae mexicanae, (Boucard.) 
117a. Cylindrella eretacea Pfr. 
T. rimata, oblongo-turrita, cretacea; spira medio ven- 
trosior, apice subtruncata vel in conum brevem abiens; 
sutura levis; anfr. 13—14 vix convexiusculi, laevigati, pen- 
ultimus semiplicatus, ultimus valide costatus, basi compresso- 
carinatus, antice horizontaliter et breviter protractus; aper- 
tura verticalis, subtriangularis; perist. continuum, undique 
rectangule patens. — Long. 24, diam. 7 mill. Ap. oblique 
51/, mill. longa, 42/, lata. 
Hab. in republica mexicana. 
122a. Cylindrella microstoma Pfr. 
T. subperforata, eylindracea, laevigata, cretacea; spira 
sursum dilatata, in conum brevem acutiusculum desinens; 
sutura impressa; anfr. 15 subplani, aequales, summi plica- 
tulı, ultimus striatus, antice solutus, dorso carinatus, bası 
angulatus, angulo antrorsum evanescente; apertura parvula, 
verticalis, subtriangularis; perist. undique breviter expan- 
sum. — Long. 151/,, diam. 5 mill. Ap. oblique 22/, mill. 
longa. 
Habitat ? 
Malak, Bl. III. Aug. 1861. 6 
