1862.] 
143 
Contributions to Indian Malacology. 
the typical group. Several species indeed tend to connect these two 
subdivisions, which more recent discoveries have rendered less dis¬ 
tinct than they appeared to be when first described. 
9. Cyclophorus patens, n. s. 
Testa subanguste umbilieata, globoso-turbinata, nitida, subglabra, 
oblique striatula, subtilissime decussata, albida, plerumque obsolete 
fulvo-strigata, fascia unica, 2-3 m.m. lata, nigricante castanea, infra 
peripheriam eircumdata ; rarius superne purpurascenti-castaneo-picta 
vel strigata, subtus castanea, periomphalo solo albido. Spira coniea 
apice acutiuscula, sutura impressa. Anfr. 5-51 convexi, ultimus ro- 
tundatus, vix descendens ; umbilicus pervius. Apertura fere vertica- 
lis, circularis, intus flaveola, peristoma simplex, breviter adnatum, 
sublate angulatim planulato-expansum, margine columellari reflexum, 
fulvum, lsete aurantiacum vel flammeum. Operc. distincte 6-spira- 
tum, corneum, nucleo centrali interno minime prominent© 
m.m. 
inches m.m. 
inches 
Diam. maj. (exempli majoris,) 
38 or 
1.5 minoris, 29 or 
1.15 
„ min. „ 
29 
1.1 „ 21 
0.82 
Alt. 
26 
1 „ 19 
0.75 
Ap. diam. intus, 
17 
0.6 „ 13 
0.5 
Hab. circa Thayet Myo, Prome, et Henzada in provincia Pegu. 
This species is remarkable for its flat, disk-shaped expanded peris¬ 
tome, usually of a bright orange or scarlet eolour, and for the absence 
of marked sculpture, and, in most specimens, of any conspicuous 
coloration, except a single broad dark chesnut stripe below the peri¬ 
phery. 
10, Diplommatina sperata, n. s. 
Testa dextrorsa, non rimata, ovato-conica, subfusiformis, solidius- 
cula, pallide cornea, subremote verticaliter costulata. Spira conica, 
apice acuta, sutura impressa. Anfr. convexi ; antepenultimus 
major, tumidus ; ultimus antiee vix ascendens. Apertura verticalis, 
subtus antiee sinuata, late auricularis, plica columellari valid a muni- 
ta; perist: subduplex, expansum, margine columellari sinuato et ad 
basin angulo acuto desinente, callo parietali mediocri. 
m.m. 
inch 
Long. 
2* 
or 0.09 
Diam. 
0.05 
Ap. diam. 
i 
0.02 
u 
