BOURCIERA. 
313 
que late expansum, reflexiusculum. — Operc. typicum. — 
Diam. maj. 17 '/ 2 , min. 13, alt. 11 mill. (Mus. Cuming.) 
Cyclostoma heliciniforme Pfr. in Proc. Zool. Soc. 1851. 
— — Chcmn. ed. II. N. 224. t. 32. f. 8 — 10. 
Bourciera helicinaeformis Pfr. Consp. N. 465. p. 71. 
Habitat in valle Yaraqui reipublicae Aequatoris (Bourcier). 
Cyclostomacea sedis omnino incertae, vel dubia. 
1- Cyelostoma cu§|)idatum Benson. 518 
T. umbilicata, acuminato-conoidea, oblique striata, lineis 
spiralibus circumdata, epidermide olivaceo - fusca ; spira elon- 
gata, attenuata, apice mammillari; anfr. 5, primi convexi, ulti- 
mus et penultimus superne convexiusculi , lira unica praediti, 
ultimus subtus convexus, peripheria carinata, carina lamellato- 
fimbriata, basi 3-lirata, lira subumbilicari fimbriata; apertura 
perobliqua, subcircularis , superne subangulata, dimidium lon- 
gitudinis aequans; perist. tenue, acutum, margine columellari 
expansiusculo ; umbilicus mediocris, profundus, anfractus plures 
exhibens. — Operc.? — Diam. maj. 6, min. 5, alt. 4 mill. (B.) 
Cyclostoma cuspidatum Bens, in Ann. and Mag. VIII. 1851. p. 189. 
— — Chemn. ed. II. Cycl. N. 407. t. 49. f. 21 — 23. 
Habitat ad apices montium Nilgberries (Jerdon). 
2. Cyclostoma marginatum Chemnitz. 519 
T. alba, subovato-rugosa, perforata, anfractibus transver- 
sis marginatis et striatis. (Chemn.) 
Turbo marginatus Chemn. Conch. IX. P. 2. p. 60. t. 123. f. 1075 a /?. *) 
— limbatus Gmel. Syst. p. 3606. N. 105. **) 
Cyclostoma murrhinum Menke Synops. ed. II. p. 39. (ex citat.) 
Habitat Coromandel. 
O b s. An potins Bithiniae species? 
*) Testa striis subtilibus et longitudinalibus scabra et rugulosa, striis 
crebris acutis traiisversis quasi costata ; umbilicus parvus ; apertura circti- 
laris ; , operculum testaceum , album, orbiculare, striis concentricis notatum. 
(Chemn. 1. c.) 
**) Testa subovata rugosa perforata alba. (Gmel. 1. c,j 
