80 
spiram subaequans, basi attenuatus; columella leviter ar- 
cuata, oblique truncata; apertura parum obliqua, sub- 
semiovalis; perist. simplex, margine dextro regulariter 
arcuato. — Long. 23, diam. 11 mill. Ap. 141/, mill. longa, 
51/, lata. 
Hab. Juquila reipublicae mexicanae. (Boucard.) 
25a: Cylindrella grandis Pfr. 
T. profunde rimata, turrita, late truncata, solidiuscula, 
oblique filoso-striata, interstitiis sub lente oblique striatulis, 
nitidula, fusco-rubella; sutura subalbomarginata; anfr. su- 
perst. 8 convexiusculi, ultimus basi obtuse carinatus, antice 
vix protractus; columella subplicata; apertura vix obliqua, 
ovalis, superne subangulata; perist. continuum, breviter, 
expansum, vix reflexiusculum. — Long. 56, diam. 17 mill. 
Ap. 131/, mill. longa, 10 lata. 
Hab. Juquila reipublicae mexicanae. (Boucard.) 
25b. Cylindrella mexicana Cuming in litt. 
T. suleato-rimata, turrita, leviter arcuato-striata et sub 
lente punctulata, parum nitens, violaceo-fusca; sutura levis, 
subalbida; anfr. superst. 10 planiusculi, ultimus infra me- 
dium obtuse angulatus, antice protractus, dorso carinatus; 
columella plica compressa, dentiformi munita; apertura vix 
obliqua, irregulariter ovalis, superne angulata; perist. con- 
tinuum, undique reflexum, margine dextro incrassato, regu- 
lariter arcuato, sinistro sinuoso. — Long. 55, diam. 15 mill. 
Ap. 13 mill. longa, 101/, lata. 
ß. Minor, anfr. superst. 8; long. 321/,, diam. 10 mill. 
Hab. in republica mexicana. 
75a. Cylindrella splendida Pfr. 
T. rimata, turrita, late truncata, solidula, oblique filoso- 
costulata, nitidula, carneo-violacea; sutura subalbofilosa, 
crenulata; anfr. superst. 8—81/, modice convexi, ultimus 
‚obsoletissime filocarinatus, antice breviter solutus; columella 
subplicata; apertura fere verticalis, oblique ovalis; perist. 
