OPISTHOPORUS. 43 
l1. Cochinchinensis (Cyclostoma) Pfr. II. 28. III. 37. — Prerocy- 
clos Cochinchinensis Reeve. — Cochinchina. 
12. eorniculum (Cyclostoma) Mouss. (Coll. 3.) I. 38 (Cyclotus). 
II. 24. III. 31. 37 (javanus). — Martens Ostas. Zool. II. p. 112. 
— Java. 
13. O0. pertusus (Cyclostoma) Morelet. ; 
,T. late umbilicata, orbicularis, depressa, tenuis, striata, 
luteo-fulva; spira vix prominens; anfr. 4 convexiusculi, sutura 
profunda discreti, ultimus antice subdeflexus, breviter solutus, 
spiraculo tubulari ad aperturam pertinente, in anfractuum 
intervallo, munitus; apertura circularis, intus albido-coerulea; 
orifierum spiraculi submarginale; peristoma continuum, sim- 
plex, vix expansiusculum. — Operculum? — Diam. 12, altit. 
| mill.* (M.) 
Cyclostoma. pertusum  Morelet in Journ. Conceh. IX. 1861. p. 177. Conf. 
Mart. Ostas. Zool. II. p. 114 (Opisthoporus?). 
Opisthoporus pertusus Issel Moll. Born. p. 75. 
Habitat in insula Borneo (Lefer de Lamothe). 
* 
14. Sumatranus Martens. f III. 37. — Martens in Monatsber. Berl. 
Ak. 1864. p. 116; Ostas. Zool. II. p. 112. t. 1. f. 4. — Sumatra. 
0. Penangensis Stoliczka. 
,O. testa sub-discoidea, apice paulum exserta, latiuscule 
umbilicata, corneo solidula; anfractibus 4!/, ad D, teretibus, 
sutura profunda junctis, epidermide brunnea vel nigrescente, 
transversim confertissime striata, in ultimo anfractu ad peri- 
pheriam superam et inferam breviter cilhata, indutis, sub epi- 
dermidem albescentibus atque strigis transversis, brunneis vel 
fuscis, paulo undulatis, aut plus minusve acute angulatis, no- 
tatis; apice sub-mammiüllato, nigrescente vel pallido; umbilico 
modico, fere dimidium latitudinis anfractus penultimi expo- 
nente; ultimo anfractu ad aperturam valde descendente, sed 
haud dissoluto, ad suturam tubulo brevi tenuique, saepissime 
tius eurvato instructo, ad aperturam breviter soluto; colore albida, strigis 
castaneis latiusculis, fulguratim transeuntibus, et ad peripheriam ult. anfr. 
fascia castanea dentata interruptis; epidermide cornea, rugulose striata; aper- 
tura obliqua, subcirculari, perist. duplici, interno laevi, supra paulo emargi- 
nato, externo expanso et reflexiuseulo, alato, ala intus excavata, angustatim 
in anfr. penultimum ascendente et adnata. — Diam. maj. 0,91, min. 0,75, 
alt. 0,27; apert. 0,27 unc. — Valle Sittonug prope Tonghu (Mason).* 
