50 PTEROCYCLOS &. 3. 
86 15. P't.? spirace!Ilum A. Adams et Keeve. 7 
T. suborbieularis, planorbula; spira depressa, pallida;. 
anfr. 4 rotundati, transversim striati, sutura distincta, ultimus 
dorso inflatus, demum coarcetatus et quasi strangulatus, varice 
fornieato prope aperturam; apertura circularis ; peritrema duplex, 
interne postice emarginatum, externe reflexum, postice in 
canalem desinens; anfr. uliimmus spiraculum tubulosum prope 
aperturam gerens; umbilicus patulus, anfractibus intus con- 
spicuis. — Opere. cireulare, spirale, intus eorneum, concavum, 
extus testaceum, margine suleatum. (Ad. et Rv.) — Diam. 
maj. 10, alt. 5 mill. (Ex 1c.) 
re 'yclostoma spiracellum 4. 4d. et Reeve Voy. Samarang. Moll. p. 56. 
(e ils raton Us 
Pterocyclos? spiracellum Pfr. Consp. N. 59. 
Habitat in. insula. Borneo. 
Obs. 1. ,Pertinet ad divisionem Pterocyclorum.* 
Obs. 2. Nonne potius Cycloto rosíellato Pfr. affinior, vel ejusdem 
speciei specimen ? 
87 16. Pt.? hbiciliatus Yfoussomn. T 
T. orbieularis, supra planulata, infra late wumbilicata, 
tenuissima, submembranacea, striis transversis acutis et pilosis 
ornata, flavescens, flammulis fulvis picta; spira depressa; sutura 
valde profunda; anfr. 4!/, teretes, obscure biangulati, spiraliter 
ciliis incurvatis nigris biseriatim insigne ornati, lbs deflectus ; 
apertura obliqua, circularis (marginibus deflectis), angulo 
supero lamina bicanaliculata insolite predito. — Opere. ?- — 
Alt 05. diam, ana]. 1145.2. mun. DI mall. Rat. yiyin; 
452.20.) 
Pterocyclos biciliatus Mouss. Jav. Moll. p. 49. t. 20. f, 9. 
— — Pfr. Consp. N. 57. 
Cyclostoma bicilialum Petit in. Journ. Conch. 1850. I. p. 43. 
Habitat in Birmah, unde in folio Nepenthis ad Javam speci- 
men unicum incompletum allatum esse traditur. (Mousson.) 
Obs. Haee species imperfecte cognita Cyeloto Tayloriano Pfr., (cui 
synonymon addendum: C. Charbonnieri Récluz in Journ. Conch, 1851. 
IL. p. 214. t 5. f. 12. 13) plurium speciminum operculo praeditorum ob- 
servatione nune bene stabilito, peraffinis videtur, nisi eadem? 
