CISTULA &. 1. 961 
2. Anfractu ulümo antice soluto. 
a. Peristomate subsimplice . . . $. 5. Nr.16—19. 
b. Peristomate distincte duplicato, 
«. limbo externo plano . . . $ 6. — 20—231: 
B. limbo externo fimbriato . . $. 7. — 28—984. 
e 
1. €.? platychiia Pfr. 
T. perforata, ovato-conica, decollata, tenuiuscula, laevi- 
gata, diaphana, hyalino-albida; anfr. superst. 4 convexi, sensim 
aecrescentes, ultimus bagi spiraliter obsolete subsulcatus; aper- 
tura vertiealis, ovalis; perist. duplieatum: internum subexpan- 
sum, non prominens, externum subincrassatum, angulatim late 
reflexum, marginibus ad anfr. penultimum callo angusto an- 
gulatim junetis, columellari medio angulatim protracto. — 
Opere.? — Long. 26, diam. 16 mill. Ap. 10'/, mill. longa, 
8 lata. (Mus. Gruner.) 
Cyclostoma latilabre Pfr. in Chemn. ed. II. N. 72. p. 78. t. 10. f. 26.27. 
— platychilum | Pfr. mss. 
Cistula? platychila Pfr. Consp. N. 380. 
Habitat . . .? 
2. €. entemnato Gould. 
T. umbilicata, globoso-turbinata, tenuis, lineis spiralibus 
confertis, magis minusve elevatis notata, pallide rubello - cor- 
nea, fasciis angustis, Interruptis, castaneis ornata; spira conica, 
integra; anfr. 5'/, convexi, ultimus teres, antice breviter solu- 
tus, dorso carinatus; umbilicus apertus, angustus, pervius; 
"apertura vix obliqua, angulato-ovalis; perist. continuum, mar- 
ginibus superne angulatim junctis, subduplicatum : internum 
expansiusculum, adnatum, externum undique fere aequaliter 
dilatatum, horizontaliter expansum, superne subauriculatum. — 
Opere. typicum. — Long. 1l, diam. 7'/, mill. Ap. intus 4'/, 
mill. longa, 3'/, lata. (Coll. Nr. 186.) 
Cyclostoma catenatum Gould in. Proc. Bost. Soc. I. 1843. p. 138. *) 
— — Jay Catal. 1850. p. 254. nr. 5827. 
*) T. conico-turrita, fulvo-viridescente; anfr. 5 convexis, striis elevatis 
volventibus, fusco articulatis; apertura suborbiculari, anfraetu penultimo 
disjuncto; perist. reflexo, postice dentato; operculo albo, calcareo, — 
Long. '/4, lat. ?/ poll. (Gould l. c.) 
425 
