﻿whorls eiglit ; apical attenuated, ni 

 swelled ; aperture small, margin thi 



Feask. ? MS. Brit. Mus. 



Jlah. Sandwich Islands. 



RISSOA.— Plate XIII 

 ddle a little 



Species 122. (Mus. ? Copied.) 



RissoA (Jeffeetsia) Gulsonj). Bis. testa parva, 

 fuhescenti, Icevigatd, elevatd, spird ohtusd; aii- 

 fractihus quinis, convexis, gradatim crescentihtcs, 

 ultimo angustiuseulo, angustissime nmhilicato ; 

 aperturd subrotundo, antice producfo. 



Wilson's Rissoa. Shell small, slightly fulvous, 

 smooth, raised, spire obtuse ; whorls five, convex, 

 gradually increasing, last rather narrow, very 

 narrowly umbilicated ; aperture rather rounded, 

 anteriorly produced. 



('L.UiK. ? British Mollusca. 



IFiili. Sandwith, Weymouth, Guernsey. 



Species 123. (Mus. Brit.) 

 HissiiA (oina) Austeali.s. Ius. testd mimUd, alhd, 

 costis nodosis, distantibus, longitudinalihus et Urit: 

 2)atieis spiralibus profunda cancellatd; anfracUbus 

 ijuiitir', Jiiit iigiihitis ; aperturd subtrigond, cnnali 

 cniisjiirin, : r,,l ii uielld crassd, lobio externa crassv, 

 iiiiiiijiiir nittniii crenulato. 

 The Austhalian Rissoa. Shell very small, white, 

 cancellated deeply with nodulous, distant, longi- 

 tudinal ribs and few spiral ridges ; whorls five, 

 biangular; aperture subtrigonal, canal con- 

 spicuous ; columella thick, outer lip thick, inner 

 margin creniilated. 



SOWERBT. 



Hah. Australia. 



A deeply cancellated little species, not exactly 

 resembling any yet described. 



{ASSIMIXEA.) 



Species 1. (Mus. Sowerby.) 



AssLMINEA Grayana. Ass. testa ronicu, Icevigatd, 



I'pidermide subviridi indutd, ; spird acumitiatd ; 



an/ractibus quinis, declivibtts, rectilateralibns : 



aperturd magna, sxibtrigond, inths eastaned, mar- 



gine continuo. 

 Gray's Assiminea. Shell conical, smooth, covered 



with greenish epidermis ; spire acuminated ; 



whorls five, sloped, straight-sided ; aperture 



large, rather trigonal, chestnut within, margin 



continuous. 

 Jeffreys. Trans. Linn. Soc. 

 Hall. Marshes of Kent. 



Species 2. (Mus. Sowerby.) 



AssLMiNEA littoeea. Ass. testd glohosd, suhdiaphand, 

 livriij'itd, filled ; aiifravti'Inis tn'btis, superiorihux 

 /./■< r/x.-.'/'/;;/.--, iijtiiiin iiiaijiiit, i,iilatii, angiiste umbili- 

 ,;ito: aprrlui-d Lit,!, manjine teiini. 



The shore Assiminea. Shell globose, a little trans- 

 parent, smooth, fulvous ; whorls three, vippex- 

 very short, last large, inflated, nan-owly umbili- 

 cated ; aperture broad, margin thin. 



Delle Chaije. ? 



Hah. Shores at Weymouth, &c. 



