102 CATALOGUE OF PHANEROPNEUMONA. 
XIII. REGISTOMA. 
Operculum orbicular, thin, horny, many-whorled. Shell ovate, 
polished, callous. Aperture circular, rather entire. Peristome 
reflected, inner lip thm, simple, columellar margin slightly 
carved and channelled in the middle. 
Registoma, Van Hasselt, Allg. Konst. en Letterbode, 1823; Gray, 
Syn. Brit. Mus. 1842, p. 91; Proc. Z. S. 1847, p. 182; Cat. Cyel. 
p. 31; Pfr. im Z. £. M. 1851, p. 151; Consp. p. 23; Pneum. Mon. 
p. 144. 
Rhegostoma, Agassiz, Nomencl. Zool. 
Rhexistoma, Hermannsen, Ind. Gen. Malacoz. ii. p. 390. 
Moulinsia, Grateloup, Act. Soc. Linn. Bord. xi. 1841, p. 428. 
Pupina sp., Gray, in Ann. Nat. Hist. vi. p. 77. 
Pupina, § 1, Pfr. in Z. f. WM. 1847, p. 110. 
1. REGISTOMA GRANDE. B. M. 
Shell ovate-cylindrical, smooth, very shining, rather diaphanous, 
sulphur or lemon-yellow, or reddish; apex blunt; whorls 5, con- 
vex, the last one shorter than the spire, deviating, rather flat- 
tened, bordered anteriorly with chestnut-colour; suture im- 
pressed, rather simple; aperture parallel with the oblique axis, 
rather angularly circular; columella dilated, flat, with an 
oblique notch, forming on the edge a small open hole, and ex- 
ternally a slightly prominent ridge; peristome broadly ex- 
panded, blunt. Length 113, breadth 7} mill. 
Pupina grandis, Gray, in Ann. Nat. Hist. 1840, vi. p. 77. 
Pupa aurantia, Grateloup, in Act. Soc. Linn. Bord. xi. p. 166. 
Moulinsia Nunezii, Gratelowp, ibid. p. 429, t. 3, f. 22, 23. 
Pupina Nunezii, Sow. in Proc. Z. 8S. 1841, p. 101; Reeve, Conch. 
Syst. t. 181, £.5, 6; Sow. Thes. n. 1, p. 17, t. 4, f 8-115 Pfr. fe. 
p. 201, t. 27, f. 1-6; Desh. Traité élém. t. 82, f. 17, 18. 
Pupina Nunezii, Sow. Conch. Man. ed. ii. f. 527. 
Registoma grande, Gray, Cat. Cycl. p. 32, n. 1; Pfr. Consp. n. 211; 
Pneum. Mon. p. 145. 
Hab. The Philippine Islands of Luzon, Samar, Catanduanos, Si- 
quijor, Leyte (H. Cuming). 
2. REGISTOMA PELLUCIDUM. B. M. 
Shell obliquely-ovate, very smooth, pellucid, fulyous; apex blunt ; 
whorls 51, the upper ones depressed, the penultimate promi- 
nent, the last shorter than the spire, deviating, shortly ascend- 
ing anteriorly; suture rather simple; columella flattened, 
curved backward, perforated by a channel, which is nearly co- 
vered and ends in an open hole; aperture parallel to the 
