162 
MOLLUSCA. 
Registoma braueri (Crosse, 1870), J. de Ooncli. xix. p. 821, pi. 13. fig. 6, 
N. Hebrides. 
Diplommatinid^. 
Diplommatina (Bens.) . Stoliczka criticizes the recent sepa- 
ration as genera or subgenera of Palaina, Moussomay Diancta, 
Pawillus, and Nicida, all of which he considers not to difler 
essentially from Diplommatina. J. A. S. B. xl. pp. 153-157. 
Diplommatina carneola and D. (Palaina) crispata, id. ibid. pp. 162 & 153, 
pi. 6. figs. 8 & 4, Moulmein j D. pert'oquini, Crosse, 1. c. p. 204, New Caledonia, 
spp. nn. 
Palaina (Semper, 1865)=PwjD0iWea (Pease, 1865): operculum membran- 
aceous, circular, multispiral. Pease, P. Z. S. 1871, p. 465. 
Alycceus, sculptilis (Bens.), caroli (Semper), Luzon, otiphorus (Bens.), 
Himalaya, and distortus (Haines), Siam : Pfeiffer, Nov. Conch, iv. pp. 17-19, 
pi. 112. figs. 20-33. 
CYCLOSTOMIDiE. 
Atropis (Omphalotropis, subg. n.). Shell elongate, obtusely angulate. 
Typos O. viridescens (Pease) and ventricosa (Ilombr. & Jacq.), Pease, 1. c. 
p. 463. 
Cyclomorpha, g. n. Shell smooth or spirally striated, subturbinate or sub- 
globose, resembling in form that of the CyclophoridcB j operculum paucispiral, 
as in Omphalotropis, Type, Cyclostoma Jlaoum (Brod.), Pease, 1. c. p. 464. To 
this genus belongs probably also Cyclophorus (Ostodes) bianyulatus (Pease) : 
Martens & Langkavel, Don. Bism. p. 68, pi. 3. fig. 16, Hervey I. 
JRealia huaheinensis (Pfr.)> variabilis and ochrostoma (Pease), and vescoi 
(Dohrn), iid. 1. c. pp. 68 & 69, pi. 3. figs. 17-20, Polynesia. 
Omphalotropis vallata (Gould) and imperfecta^ var. n., Mousson, J. de Conch, 
xix. p. 28, Tonga I. 
Omphalotropis elongata (Pealia, Pease, 1867), raiatensis (Hydrocenaf 
Mouss., 1869) ; Pease, ibid. p. 95. Pease adds some remarks to his former 
monograph of this genus, ibid. p. 97. 
Scalinella tahitensis (Pease), Martens & Langkavel, 1. e. p. 69, pi. 4. fig. 3. 
Pomatias himalayanus (Bens.), croaticus (Zeleb.), and dalmatinus (Parr.) : 
Pfeifior, Nov. Conch, iv. pp. 14-16, pi. 112, figs. 11 & 13, 14 & 18, 17 & 19. 
Truncatellid^. 
Truncatella futunaensis, sp. n., Mousson, J. de Conch, xix. p. 80, Futuna, 
Tonga I. 
Truncatella cristata (Crosse), redescribed, ibid. p. 66, and figured pi. 3. 
fig. 11, also from Tonga. 
Taheitia (A. Ad.) differs only in its operculum from truncatella, and some 
transposition of spp. is necessary in these genera. T. scalariformis (Reeve, 
1842) = a: cticostata (Mouss., 1869 ) ) T. concinna, Kingsmill I., and costelli- 
fera, Vaiai, spp. nu.. Pease, P. Z. S. 1871, p. 468, and J. do Conch, xix. 
pp. 91 & 96. 
