MEGALOMASTOMA §.2.3. 
131 
Cyclostoma Orbignyi Pfr . in Proc. Zool. Soc. 1850. 
— — Chemn. ed. II. N. 262. t. 37. f. 3. 4. 
Megalomastoma Orbignyi Pfr. Consp. N. 190. p. 73. 
/?. Testa unicolore virenti - fulva. 
y. Testa minore, interdum omnino violacea, anfractibus convexioribus ; long. 
20, diam. 8 mill. 
Cyclostoma Orbignyi var . Chemn. 1 . c. t. 37. f. 5. 6. 
Habitat in insula Haiti (Salle). 
11 M. ehrysallig Pfr. 224 
T. umbilicata, distorto-ovata, solida, striatula et punctato- 
malleata, fusco-carnea ; spira irregulariter ovata, apice conoidea, 
acutiuscula; sutura levis; anfr. 6 convexiusculi , penultimus 
latere aperturae planulatus, ultimus angustior; apertura verti- 
cals, circularis; perist. crassum, dilatatum, patens, reflexum, 
margine supero linea horizontali adnato. — Operc.? — Long. 
16, diam. 9 mill. Ap. intus 4 mill, longa. (Mus. Cuming.) 
Cyclostoma chrysallis Pfr. in Proc. Zool. Soc. 1851. 
— — Chemn. ed. II. N. 217. t. 31. f. 23. 24. 
Megalomastoma chrysallis Pfr. Consp. N. 191. p. 73. 
Habitat Arva (Cuming). 
§■ 3. 
12 . M. simulacrum Morelet. 225 
T. subperforata, turrita, truncata, solida, laevigata, vix 
nitidula, virenti - fulva vel castanea; spira elongata, sensim 
attenuata; sutura submarginata ; anfr. superstites 6 convexius- 
culi, ultimus basi filo-carinatus, supra carinam striatus ; apertura 
verticalis, subcircularis ; perist. duplex : internum breviter por- 
rectum, externum late expansum, album, intus concavum, ad 
perforationem interruptum, margine supero appresso, columellari 
libero. — Operc. corneum, planum, arctispirum, margine an- 
fractuum sublamelloso. — Long. 35, diam. 11 mill. Ap. intus 
7 mill., cum perist. 11 mill, longa. (Mus. Cuming.) 
Cyclostoma simulacrum Morclet Test, noviss. p. 22. N. 54.*) 
*) T. pyramidalis , umbilicata , fulvo - virescens vel saturate castanea ; 
spira turrita, apice pallidiore, acuminato, plerumque decollate ; anfr. 10 — 12 
planulati , obsolete striati , ultimo ad aream umbilicalem excavate , filocari- 
nato ; apertura circularis ; perist. intus nitidum, pallide cinerascens, duplex ; 
internum lineare, integrum, emergens ; externum late expansum, concavum ; 
margines acuti , versus umbilicum soluti , limbo sinistro libero ; columellari 
appresso, utroque reflexiusculo. — Long. 38 — 45, diam. 11 — 12 mill. (Mor. l.c.) 
9 * 
