PTEROCYCLOS §. 1. 
51 
5, rotundatis, ultimo non descendente; apertura obliqua, circu- 
lari; perist. duplicato, interno superne breviter inciso, externo 
expanso , supra sinum latiusculo , subcucullato. — Operc. 
arctispirum , extus concaviusculum , marginibus anfractuum 
laciniatis. — Diam. maj. 15, min. 12, alt. 10 mill. 44 (H. Ad.) 
Pterocyclos Hainanensis H. Adams in Proc. Zool. Soc. 1870. p. 8. t. 
1. f. 16. 
Habitat in insula Hainan (Swinhoe). 
e. Pi ater Stoliczka. f 
„Pt. testa orbiculato - planorbulari , latissime umbilicata; 
apice vix exserto; anfractibus quinis, depressiuscule teretibus, 
sutura profunda junctis, liris spiralibus tenuibus, plus minus ve 
distincte setiferis, subdistantibus , ornatis, sub epidermide livi- 
dis , transversaliter fulguratim castaneo notatis , epidermide 
scabriuscula, transversim confer te striata, indutis; ultimo an- 
fractu ad aperturam sensim descendente; apertura obliqua, 
circulari; peristomate duplici, interne paululum crassiculo, ad 
suturam emarginato, externo tenui, clilatato, supra in alam 
angustam, curvatam atque ad anfr. penultimum leviter affixam 
eipanso, pone alam perforato. — Operculum orbiculare, supra 
lamellis spiralibus exstantibus, distincte denticulatis, composi- 
tum, infra laevigatum, volutionibus angustis spiralibus concen- 
trice minute striatis. — Diam. maj. 16,5, min. 13,5, alt. tot. 
testae 7,2, axis 3,2, diam. diag. apert. cum perist. 6 mill. 44 (St.) 
Pterocyclus ater Stol. in Journ. As. Soc. Beng. XL. Pt. 2. 1871. p. 149. 
t. 6. f. 2. 
Habitat Kuengan, ad flumen Ataran, prope Moulmein 
(Theobald). 
* 
7. Sum at ran us Martens, f III. 42. — Martens in Monatsber. Berl. 
Ak. 1864. p. 116; Ostas. Zool. II. p. 115. — Issel Moll. Born. p. 
72. — Sumatra, Borneo (Wright). 
s. ? Pt. eudaedaleus Crosse. + 
„T. latissime umbilicata, subdiscoidea , tenuiuscula sed 
solidula, parum nitida, spiraliter minute striata, luteo-albida, 
strigis numerosis, regulariter fulguratis, castaneis, elegantissime 
ornata; spira depressa, planiuscula, medio vix paululum pro- 
minula , apice obscure violaceo ; sutura profunde impressa, 
subcanaliculata ; anfr. 4^ piano -convexiusculi, ultimus vix 
descendens, rotundatus, strigis castaneis fulguratis, paulo supra 
4 * 
