﻿RISSOA.— Plate VI. 



parvi'i, miticr canalicnlati'i, columelhl brer!, craiysd, 

 lahio externo cnissa, antic,!: producto. 



The neat Rissoa. Shell white, solid, raised, spire 

 elongated, rather swelled in the middle, apex 

 acuminated ; whorls eight, convex, spirally and 

 longitudinally ribbed, ribs nodose at the angles ; 

 aperture small, anteriorly channelled, columella 

 sliort, thick, outer lip thick, anteriorly produced. 



A. Adams. Proc. Zool. Soc. 18.51, p. 2GG. 



Hall. Philippines. 



Species 54. (Mus. Sowerby.) 



Rissoa uuisea. Sis. (Barleia) testa emiira, fusrn, 

 solidil, politd ; anfractibus quataor, cmive.viiisculis, 

 iiltimo infra medium subangulato ; aperturd suh- 

 trlgond, magna, columella rectiihculd. 



Thk ked Rissoa. Shell conical, brown, solid, 

 polished ; whorls four, rather convex, last rather 

 angular below the middle ; aperture subtrigonal, 

 large, columella rather straight. 



Ai.AMS. Trans. Linn. Soc. Vol. III. PI. XIII. f. l-x 



Jlissoa imifasciata, Montagu. 



JTal. Britain, Mediterranean. 



quiiiqne, lateraliter comp-essis, ultimo angulato ; 



aperturd suhtrigoud. 

 The fulvous Rissoa. Shell conical, raised, solid, 



brown, broadly banded, polished ; whorls live, 



laterally compressed, last angular ; aperture 



snbtrigonal. 

 MiCHAUD. Nonv. Esp. de Rissoa, p. 1-5, f. 17, 18. 

 H(di. Adriatic. 



Species 55. (Mus. Marrat.) 

 Rissoa kilva. Ris. (Barleia ?) testd conicd, elevatd 

 siilidd, fused, late faseiatd, jwlitd ; anfractibu 



Species 56. (Mns. Marrat.) 

 Rissoa crebeishlcata. Bis. (Bissoina.) testd elongato- 

 ovatd, scabrd, costis longitudinalibus subobliquis, 

 validis, vodosis, et litis ienuibus spiralibus can- 

 cellatd; anfractibus octo, convexiiisculis ; aperturd, 

 infra canalicidatd ; aperturd parvd, ovatd 

 rolumelld crassd, brevi, labia e.vterno crasso, crti'is 

 rrnnato. 

 The CLO.SE-GEOOVED Rissoa. Shell elongated-ovate, 

 scabrous, cancellated with rather oblique, strong, 

 nodulous, longitudinal ribs ; whorls eight, rather 

 convex ; aperture channelled below, aperture 

 small, ovate ; columella thick, short, outer lip 

 thick, crenulated outside. 



SoWEEliY. 



Eab. ? 



This beautifully sculptured little shell when received 

 was labelled 'iJ. canaliculata Ad.,' but being afterwards 

 found not to agree with the specimen in the British 

 Museum, we have had to give another name to it. 



