442 MR. E. A. SMITH ON NEW SHELLS FROM [June 16, 



carinam aqualiter convexa ; anfractus normales 3, ad suturam 

 carina marginati, radiatim tenuiter plicati {plicis supra an.fr. 

 vltimum fere ohsoletis), liris duahus {altera supra, altera suturam 

 infra) plus minus indistinctis supra plicas leviter nodulosis 

 cincti; anfr. idtimus prope umhilicum radiatim pUcatus, peri- 

 pheriam versus concentrice subliratus ; wnbilicus carina intrante 

 crenulata marcjinatus ; apertura rotunde suhtrianrjularis. 

 Biam. maj. 7| millim., min. 6y ; alt. 4; umhilicus 2 latus. 

 This species somewhat resembles S. discus of Philippi as regards 

 general form, but it appears to be more acutely carinate, and there 

 are differences iu the aperture. 



The apex consists of about oue and a half smooth convex whorls 

 which are incoiled and thus conceal the nucleus. 



20. Bulla incommoda. (Plate XXXV. fig. 20.) 



Testa parva, ancjuste umbilicata, ovata, alba, nitida, superne et 

 inferne striis transversis jjaucis sculpta, incrcmenti lineis striata ; 

 apex angu^tissime perforatus ; apertura angusta, infra paulo 

 dilatata, superne supra apicem producta ; columella leviter torta, 

 inferne arcuata, refiexa, expansa. 

 Longit. 5g millim., diam. maj. 3|, min. 3. 



The few spiral striae at each end are rather far apart, with the 

 exception of those immediately around the umbilicus, which are more 

 approximated. 



21. Cylichna ordinaria. (Plate XXXV. fig. 21.) 



Testa cylindracea. alba, nitida, imperforata, ad apicem haudpro- 

 funde excavata, imjjressione carina circumdata ; apertura angus- 

 tissima, antice dilatata, subtruncata; columella subtorta, excavata, 

 carina circumcincta. 

 Longit. 7 millim., diam. 3. 



The distinguishing feature of this species is the excavation of the 

 lower part of the columella, which is circumscribed by a keel, a con- 

 tinuation of the thin outer lip. 



22. Tellimya subacuminata. (Plate XXXV. fig. 22.) 



Testa M. acuminatse similis, sed postice minus rostrata, margitie 

 inferiore latius curvato, postico dorsali declivi, fere rectilineari. 



Longit. 5 millim., alt. 4, diam. 2-j-. 



This species closely resembles Montacuta acuminata. Smith, from 

 North Australia, but differs in form somewhat. It is longer in pro- 

 portion to the height, has the ventral outline more gently curved, the 

 posterior end is not so beaked, and the dorsal slopes, especially the 

 posterior one, are more rectilinear. The sculpture and dentition are 

 similar. 



23. NucuLA DiLECTA. (Plate XXXV. fig. 23.) 



Testa parva, incequilateralis, ovata, utrinque subcequalis, nitida, 

 incrementi lineis tenuibus striata, dilute virenti-lutea, umbones 

 versus pallidior, induta ; apices opaci, albi, antemediani, ad ^ 



