290 MR. E. A. SMITH ON THK L-^P''' ^» 



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

 dotted with white. 



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



Testa hrevis, oi>nta, nitida, 'peJluckla, cornea, supra carinas rufovel 

 fusco punctata, imperforata ; anfractns 4, jrrimus lievis, eceteri 

 superne tahulati, carinis fortibus (in anfr. superioribus 2, 

 ultimo 5) instrvcti, sutiira marginatn discreti ; aperivra oblique 

 ••otiindo-ovata, Jonr/it, fotins | Tta^id aquans ; peristoma eon- 

 linimm, marr/ine e.vterni) e.rtns incrassato. cohimellari leviter 

 rejle.ro. 



LoDffit. 2 millim., diam. ]. 



This charming little species is at once recognizable by the strong 

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

 forming longitudinal series. 



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



Testa ovaio-acuminafa, imperforata, alba,Jlareseens vel ruftscens ; 

 anfractus 5, supremi duo convexi, tenuiter spiiraliter Jirati, 

 seqiientes conve.viuscidi, sutvra profunda sejuncti, carinis spira- 

 hhvs (in anfr. sii2yeriorihus 3, in nltlmo 7-8) instructi ; striis mi- 

 eroscopicis spi raWms sculpti ; apertura parva, ovcda, longit. totins 

 ^ ndeequans ; peristoma continuam, marrjine externo tenui, 

 varice valido paulo remoto instrucio, cohtniellari ohliquo, anguste 

 reflexo. 

 Loivjit. 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, [jresented to the British Museum by the Rev. R. Boog 

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

 him (Proc. Zool. Soo. 1873, p. \MX) under the name U. snbcarinata. 



RissoA p.SEUSTE,s. (Plate XXIV. fig. 2.) 



Testa ovata. snhrimaia, tennis, fuscescenti-cornea, iritida.peUncida ; 

 anfractns 4, conve.vi, dim apicales striis microscopicis spiralihv,^ 

 striatt, ccteri fere lo'ves, infra suturam riifescentes, distimte 

 7narr/inati ; npertiira ovata, postice angnstcUa, longit. lotitis ^ 

 pxiulo minor; perisiorna tenne, coidimnirn. margine colinnellim 

 rtfescente, anguste reflexo. 

 Longit. ] g 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 

 Jeffreysia. It is very like R. per minima, Watson (? not of Manzoni), 

 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, leevis, saturate rufa, infra 

 suturam alho ma^-ginata vel maculata, infra medium anfract. 

 idtimi alba ; anfr. 5, conve.viusculi, nltimus ad peripheriam 

 obtuse rotunde angalutus ; apertura rotundatn, superne leviter 



