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



carinam cequaliter convexa ; anfractus normales 3, ad suturam 

 carina marginati, radiatim tenuiter plicati {plicis supra anfr. 

 ultimum fere obsoletis), liris duahus {altera supra, altera suturam 

 infra) plus minus indistinctis supra plicas leviter nodulosis 

 cincti; anfr. ultimus prope umbilicum radiatim, plieatus, peri- 

 pheriam versus concentrice subliratus ; umbilicus carina intrante 

 crenulata marginatus ; apertura rotunde subtriangidaris. 

 Diam. maj. 7| millim., min. 6| ; alt. 4; umbilicus 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 in the aperture. 



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

 which are incoiled and thus conceal the nucleus. 



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



Testa parva, anguste wmbilicata, ovata, alba, nitida, superne et 

 inferne striis transversis paucis sculpta, incrcmenti lineis striata ; 

 apex angustissime perforates ; apertura angusta, infra paulo 

 dilatata, superne supra apicem producta ; columella leviter torta, 

 inferne arcuata, refiexa, exjxinsa. 

 Longit. 5^ 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 cylinclracea, alba, nitida, imperforata, ad apicem haudpro- 

 funde excavata, impressione carina circumdata ; apertura angus- 

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

 carina circutncincta. 

 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 thm outer lip. 



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



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

 inferiore latius curvato, postico dorsali declivi, fere rectilineari. 



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



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, inasquilateralis, ovata, utrinque subasqualis, nitida, 

 incrementi lineis tenuibus striata, dilute virenti-lutea, umbones 

 versus pallidior, induta ; apices opaci, albi, antemediani, ad 5 



