72 
42 PTEROCYCLOS $. 1. 2. 
gd 
1. P't.? incomptus Sowerb y. 
T.late umbilicata, depressa, solida, ruditer striata, opaca, 
sub epidermide fusco-cornea decidua alba; spira parum ele- 
vata, vertice prominulo; anfr. 5 convexi, rapide accrescentes, 
ultimus teres, obsolete angulatus; apertura diagonalis, subcir- 
cularis; perist. simplex, margine columellari incrassato, brevi- 
ter adnato, a supero alatim dilatato sinu profundo sejuncto. — 
Operc.? — Diam. maj. 40, min..32, alt. 15 mill. (Mus. 
En. 
Cuming.) 
Cyclostoma incomptum Som, 'Thes. Suppl. N. 183. p. 160*. t. 31 A. 
f. 298. 299. *) 
Pterocyclos incomplus Pfr. in. Zeitschr. f£. Mal. 1851. p. 9. 
— -— Chemin. ed. II. Cycl. t. 31. f. 1. 2. Consp. N. 45. 
Habitat in India? (Sowerby), in Brasilia (Cuming). 
idw 
13 2. EP*'t. brevis (Lituus) Martyn. 
T. late umbilicata, conoideo-semiglobosa, solida, striatula, 
nitidula, castanea, fulvido-variegata; spira brevis, obtusiuscula ; 
sutura late impressa, marginata; anfr. 5 convexi, ultimus basi 
angulatim in umbilicum infundibuliformem abiens; apertura 
subeireularis, intus albida;  perist. incrassatum,  reflexum, 
superne ad anfractum penultimum in appendicem triangularem, 
profunde canalieulatam protractum , extus superne tuberculo 
lato, prominente munitum. — Opere. planiusculum, crassum, 
aretispirum , nigricans, anfractibus extimis lamellatim elevatis. 
— Diam. maj. 36, min. 30, alt. 22 mill. Ap. intus 12 mill. 
diam. (Mus. Cuming.) 
Lituus brevis Martyn Fig. of non-described shells t, 28 c. Ed. Chenu 
(Bibl. conch. IL.) p. 21. t. 8. f. 2. 
Turbo Petiverianus Wood Suppl. t. 6. f. 2. 
Cyclostoma Petiverianum Gray in. Wood suppl. p. 36. 
-— Som. Spec. f. 97. 98. 
E — Reeve Conch. syst. II. t. 184. f. 15. 
*) T. depresso-suborbiculari, alba, epidermide olivaceo-brunnea induta; 
spira brevi, obtusa; anfr. 4'/, rotundatis, oblique lineis incrementi validis 
striatis; sutura distincta; apertura fere circulari, postice prope ultimum an- 
fractum sinuata; extus tubereulam fornicatam formante; peritremate antice 
incrassato; umbilico magno. (Sow. l. c.) 
