266 



Neritina spinipercla Morelet. 



Morelet series conchyliologiques II 1863. p, 121. pl. 6. fig. 3. 



Testa ovato-globosa, solida, rugis flexuosis interdum articulatis sulcata, olivacea, unicolor; 

 spira involuta, obtusa, brevis, apiceerosa; sutura valde lacera ; anfr. ultimus superne compressus, 

 plano-declivis, supra medium angulatus, angulo spinis brevibus, deciduis coronato; apertura 

 modica coerulea vel albo-livida ; area columellaris callosa, aurantio dilute maculata vel griseo- 

 virescens; margo arcuatus, denticidatus, dente mediano et infero majoribus. 



Operculum sulco bipartiium, basi emarginatum, arcuato-striatulum, pallide carneum, 

 margine supero nigro limbato. 



Long. (Diam. maj.) 18, diam. (min.) 12 Mill. (Alt. 15, marg. col. 10, lat. areae 

 5 Mill. ex icone). 



Nossi-be, Madagaskar, in fliessendem Wasser, E. Vesco. 



b) Mit besonderer Sculptur, ohne Dornen. 

 Neritina lentiginosa Reeve. 

 Reeve conch. ic. Bd. IX. pl. 25. fig. 110. 1855. 



Testa conoideo-globosa, solidiuscula, spira obtusa, anfractibus superne declivibus et 

 subrude plicato-striatis, area columellari subcallosa; olivacea, punctis minutis albis, nigro 

 umbratis, promiscue lentiginosa. 



Diam. maj. 14 1 / 2 , alt. 14. marg. col. 8. Mill. (ex icone). 



Inseln der Südsee. 



Flecken mit schwarzen nach vorn gerichteten Spitzen. 



c) Ohne besondere Sculptur und ohne Dornen. 

 Neritina sandalina Becl. 

 Nerita (Clithon) sandalina Recluz Revue zool. 1842 p. 76. — Reeve conch. icon. fig. 58. 

 Testa semiglobosa, interdum subovata, sub sutura compresso-strangulata, fusco-nigra, 

 tenuiter striata; apice convexo-obtuso ; apertura albido-lutescente, labio piano, margine vix 

 arcuato et obsolete denticulato; labro patulo, superne depresso, linea nigra marginato. 

 Long, (alt.) 18, larg. (diam. maj.) 21 Mill. 

 Sandal-Bay., Lebuka, Viti-inseln, und Taheite. 



Neritina circumvoluta Red. 



Recluz Proc. Zool. Soc. 1842 p. 173. — Sow. thes. fig. 202, 203. — Reeve conch. ic. fig. 35. 



Testa globoso-subovata, dilute fulva, in roseo vertente, punctis luteolis antice lineis 

 nigris marginatis marmorata, zonis nigris remotis (2) circumcincta; anfr. 2, nigromarginatis, 

 supremo obtuso, decorticato; apertura albida, labio piano, superne callaso, antice ruguloso 

 et in medio arcuatim emarginato. 



Long. 0,72, lat. 0,84, convex. 0,68 poll. 



Philippinen. Insel Negros an Steinen in einem Bergbach, Cuming. 



