288 MR. E. A. SMITH ON THE [Apr. 1, 



aquaiis ; columella hasi incrassata producta ; labrum incras- 

 saium. 

 Lonrjit. 2| millim., diam. 1. 



The apex of this species is verj' peculiar, being large, smooth, and 

 soinewhat uncoiled. 



RissoA CALA. (Plate XXI. fig. 21.) 



Testa ovato-piiramidalis, niiida, mediocrUer tennis, albida, 

 lineis -vel strir/is longltudiiialibus undulatis irreffidciribus 

 2)icta ; aiifractus G, levifer convexi,lcevii/ati ; apex suhacutus, 

 sj}iralifer tenuissime striatits ; anfract. ultimus ad basini 

 albiis, hand tarieyatus, in medio obsolete rotunde subangulatus ; 

 upertura rotundata, intus albida; columella fitsco tincta; 

 labrum fenue, album, 

 Longit. 3 millim., diam. 1|. 



The brownish markings are irregular in shape and direction, and 

 give most of the specimens the appearance of being mottled with 

 brown and white. Some examj)les, however, which have only a 

 brownish zone round the middle of the body-whorl, bear consider- 

 able resemblance to Barleeia rubra, ISIoutagu. That species has 

 not the same spiral striation on the upper volutions. 



RissoA EPHAMiLLA. (Plate XXI. fig. 22.) 



Testa ovato-pyramidalis, Icevigata, albida, infra suturam opaco- 

 albo et rufo-fusco inaculata ; anfract. 6, vix convexi, ultimus 

 ad basim lineis radiantibus fuscis ornatus ; apertnra rotun- 

 data, longit. totius g subcequans; columella fusco-purpureo 

 tincta ; lahrum vix incrassatuin. 

 Longit. 4 millim., diam. 2. 



This species must not be confused with 11. cala. It is a little 

 larger, somewhat more solid, has rather less convex whorls, and is 

 not coloured in the same way. Both have the columella stained 

 with a brown or purplish-brown colour, and united to the outer lip 

 above b}' a thin callus. 



llissoA GLYPTA. (Plate XXIII. fig. 39.) 



Testa ovato-pyramidalis, alba vel rufescens, imperforata, nitida ; 

 anfractus 6, apicales l(Eves, convexi, cceteri superne declives, 

 interdum jxiulo excavati, in medio atit obtuse vel subacute 

 angulati, infra unguium contracti, liris spiralibus tenuibus 

 cincii, interdum ad unguium p>lus minus lonqitudinaliter 

 plicati ; apertura rotunde ovata, longit. totius g adaquans ; 

 2)eristoma continuum, margine basalt subeffuso, columellari 

 anguste reflexo. 



Longit. 3g millim., diam. Ig. 



In some specimens the walls are much more angular than in 

 others, and the longitudinal plicae vary also very much in 

 development. 



