162 6. Nevill — New Species of Braelcish-water Molluslcs. [No. 3, 



Type Indian Museum, Calcutta ; also in coll. Hungerford. 



ASSIMIDEA PEASEANA, H. Nevill, MSS. 



T. peranguste perforata, ovato-coiiica, notaliliter tenuis, glalra, nitida, 

 vivide straininea, ad suturam fascia livida {phis minusve suloisoiete) mar- 

 ginata ; spira convexo-conica, producta, apice acuto ; anfr. 7, convexiusculi, 

 ultimus rotundatus, inferne convexus, circa perforationem haud carinatus ; 

 peristoma perregulariter rotundatwm, ad hasim haud angulatum ; inargo 

 columellaris late dilatatus, suhduplex, castaneo vivide tinctus ; apertura 

 suhrotundata, marginihus callo suhobsolete castaneo j unci is. 



Long. 5f, diam. 3^ mil. 



Hab. Lake Negombo, Ceylon. 



Named in manuscript by my brother, in honour o£ the late Harper 

 Pease of Honolulu ; it is a very distinct species, easily distinguished from 

 Ass. suhconica, Ass. marginata, &c., by its thin texture, peculiar coloration, 

 absence of any trace of sculpture, rounded margins of the aperture, &c. 

 Specimens of rather larger size than that of which the measurements are 

 above recorded occasionally occur. 



Type Indian Museum, Calcutta; also in coll. H. Nevill and H. 

 Dohrn. 



ASSIMINEA BIFASCIATA, n. Sp. 



T. imperforata, ovato-conica, solida, vix glairinscula, suhiitida, sordide 

 viridula, fasciis hiiiis fuscis et suhohsoletis cincta ; spira moderate pro- 

 ducta, convexo-conica, apice suhacuto ; anfr. 6-5-, convexiusculi, ultimus 

 tumide ventricosus, ad pi^^'ip^ieriam suiangulatus ; apertura ampla, sub- 

 verticalis, marginibus callo pervalido fusco-limiato junctis, margine colu- 

 mellarifere recto, valide incrassato, sordide fusco, inferne subrotundato. 



Long. diam. 85 mill. 



Hab. Brackish-v?ater lagoon, Port Natal. 



A common species, quite distinct from the three forms described by 

 Krauss. 



Type Indian Museum, Calcutta. 



AgsmrcTEA dohbniana, n. sp. 



T. parva, solidiuscula, ovata, fusco-viridescens, anguste umbilicata, 

 laevigata, sutura lineari, liaud marginata ; spira curt a, apice perohtuso ; 

 anfr. 4, rotundato-convexi ac tumidi, ultimus inflatus, siibtus convexus, basi 

 prope regionem umbilicalem subexcavate depressus ; apertura suhverticalis, 

 ovato-pyriformis, dimidiam totius longitudinis aeqimxs, intus pallide 



