290 MR. E. A. SMITH ON THJfi [Apr. 1, 



volution and the lower portion of the upper whorls ; it is often 

 dotted with white. 



RissoA PERFECTA. (Plate XXIII. fig. 42.) 



Testa hrevis, ovnta, nitida, 'pelhActda, cornea, supra carinas rufovel 

 fusco punctata, imperforata ; anfractiis 4, pnmus Icevis, cceteri 

 superne tahulati, carinis fortihus (in anfr. superiortbus 2, 

 ultimo 5) instrvcti, sutura 7narginata discreti ; aperiura oblique 

 rotiindo-ovata, 7oiu/it. totiiis | hnnd o'quans ; peristoma con- 

 tinutim, marejine e.vterno e.rtus incrassafo. eohimelJari levitcr 

 refle.ro. 



Loiujii. 2 millihi., diam. 1. 



This charming little species is at once recognizable by the strong 

 red-dotted spiral ridges. The dots usually fall under one another, 

 forming longitudinal series. 



RiSSOA VARICIEERA. (Plate XXIV. figS. 1, I «.) 



Testa orato-aciiminafa, imperforata, alha,flavescens vel riifescens ; 

 anfractus -5, supremi duo convexi, tenuiter spircditer lirafi, 

 seqiienfes coiive.viuscidi, s^itvra profunda sejuncti, carinis spira- 

 hhus (in anfr. sujyeriorihus 3, in ultimo 7—8) instrvcti ; striis mi- 

 croscopicis sjnralibu^ scidpti ; apertura parva, ovaia, longit. totiiis 

 ^ adcequans ; peristoma continuum, manjine externo tenui, 

 varice valido paulo remoto instructo, columellari ohliquo, anrjuste 

 reflexo. 

 Longit. 1| millim., diam. |. 



The little varix at a short distance from the extreme thin edge of 

 the labrum is of a convex swollen character. A series of specimens 

 from Madeira, ])resented to the British Museum by the Rev. R. Boog 

 Watson, very closely approach this species ; they are referred to by 

 him (Proc. Zool. Soo. 187.3, p. .S74) under the name R. mhcarinata. 



RissoA P8EU.STES. (Plate XXIY. fig. 2.) 



Testa ovata, suhrirnata, tenuis, fnscescenti-cornea, nitida,peUucida ; 

 anfractus 4, convexi, duo apicales striis microscopifis spiralibus 

 striati, ccpteri fere Iri'ves, infra sufuram rufescentes, distinrte 

 mare/inati ; apertura ovata, postice angustata, longit. totius ^ 

 paulo minor ; ijeristoma tenue, continuinn, marepne columellari 

 rufescente, anguste reflexo. 

 Longit. ] J millim., diam. |. 



This minute species, of which there are four specimens, has 

 rather the look of an embryonic shell. It may prove to be a 

 J^ffreijsia. It is very like R.perininima, Watson (? not of Manznni), 

 Proc. Zool. Soc. 1873, p. 383, bur seems rather shorter and has no 

 basal striae. 



Barleeia CONGENITA. (Plate XXI. fig. 25.) 



Testa solida, obtuse ovato-conoidalis, Icevis, saturate rufa, infra 

 suturarn albo marginata vel maculata, infra medium anfract. 

 ultnni cdha ; anfr. 5, conrexiusculi, nlfimus ad peripheriam 

 obtuse rotunde angutatus ; ajjerfura rotmulata, superne leviter 



