TRAVAUX INEDITS. 477 



NOTA. La suite au prochain numero. 1/explicaliou ik's plau 

 ches 18, 19, 20 et 21 sera donuec a la fm de ce mduioire. 



Diagnoses Testarum Indo-Sinarum. Series prima. 

 Auctore Arthur MORELET. 



HELIX SUPERLITA. Testa obtecte perforata, de- 

 pressa, tenuis, pellucida, vix striatula, fulvo-rufescens, 

 nitide micans; spira planulata, apice vix prominula; 

 anfr. 5 convexi, sutura canaliculata juncti, ultimus circa 

 perforationem concaviusculus ; apertura parum obhqua, 

 lunato-ovalis; perist. simplex, rectum, margine columel- 

 lari sinuate, leviter calloso, ad perforationem saepius ob- 

 structam vix reflexiusculo. 



Diam. maj. 15, min. 12, altit. 7 millim. 



Habitat ad Wampoa et Canton. 



EMNEA BULBULUS. Testa aperte perforata, oblique 

 ovalis, obtusa, turgida, solida, arcuatim costulata, niti- 

 dula. alba; spira conum brevem et obtusissimum for 

 mans; sutura leviter impressa; anfr. 6 1/2 parum convexi, 

 ultimus inflatus, spira paulo minor, basi attenuatus, circa 

 perforationem comprcssus et carinatus ; apertura subver- 

 ticalis, truncato-ovalis, dentibus 4 coarctata ; 1 lamellaris, 

 validus ad marginem parietis ; caeteris parvulis et sub- 

 eequidistantibus, in palato ; perist. incrassatum, expan- 

 sum, reflexum, margine dextro sinuato, callum triangu- 

 larem, Iamina3 parietali connexum, ad insertionem emii- 

 tente. 



Longit. 15, diam. 10 mill. 



H. in insula Poulo-Condor. 



PLANORBIS CIRCUMSPISSLS. Testa discoidea, supra 

 umbilicata (vertice immerso), subtus convexior, medio 

 planulato-concava, utrinque dense capillaceo-striata, te- 

 nuis, opaca, cornea, periphcria dilute castanea; anfr. 4 

 convexi, sutura profunda juncti, ccleriter cresccnles, ulti- 

 mus rotundatus ; aperlura subrecta, oblicjue semi-ovalis, 

 marginibus acutis, rectis, callo lenui connexis, dextro i-t 

 columellari leviter ascendentibus. 



