274 MR. E. A. SMITH ON THE [Apr. I, 



That species has, however, rather stronger ribs and distinct spiral 

 strise, which at once separate it from the present species. 



S. onellissi is of a livid colour, and glossy between the white 

 ribs, which are thirteen or fourteen in number, and are very like 

 those of 8. trevelyancB, but have not the short projection near the 

 upper end. It may be described as a stumpier species than that 

 shell, the spire being less slender, 



SCALARIA SANCTiE-HELEN^. (Plate XXIII. fig. 14.) 



Testa parva, albida, turrnta, gracilis, imperforata ; anfr actus 8-9, 

 primi 3-4 Icevigati, nitentes, convexi, pellucidi, cceteri convexi, 

 contigui, lamellis numerosis, (in anfr. ult. 26-28) tenuissimis, 

 paulo ohliquis, instructi ; apertura subcircularis, inferne obscure 

 effusa. 

 Long it. 4| millim., diam. 1|. 



The number of whorls, and their steady enlargement, incline me 

 to believe that this species does not attain a much larger size. It 

 seems to approach S. pulcliella, Bivoua, but the riblets are liner and 

 the whorls not quite so high. 



ScALARIA COMMODA. (Plate XXIII. fig. 15.) 



Testa parva, angusta, elongata, albida, iviperforata ; anfractus 

 9, sutura undulata sejuncti, primi ires convexi, nitidi, ru/es- 

 centes, cceteri convexi, costis crassis circa 11, leviter ohliquis, 

 lirisque tenuibus, pluribus, cancellati, incrementi lineis niinutis- 

 sime decussati ; anfr. ultimus lira crassa inferne cinctus ; 

 apertura ovuto-circularis, superne quam basi angustior ; labrum 

 valde incrassatum. 

 Tiongit. 5 millim., diam. \\. 



This minute species is well characterized by its reddish apex, the 

 strong ribs extended upward, so as to form a wavy sutural line, and 

 the spiral lirae, producing a cancellated appearance. 



ScALARiA ATOMUS. (Plate XXIII. fig. 16.) 



Testa minima, brevis, anguste umbilicata, alba ; anfractus 4|, 

 perconveai, sutura profunda sejuncti, primus Icevis, cteteri costis 

 tenuibus circiter 18 instructi; apertura oblique ovata, basi 

 paulo subeffusa ; peristoma in exemplis adultis continuum, 

 murgine columellari subreflexo. 



Longit. \h millim., diam. 1. 



The shells here described, although so small, appear to be full- 

 grown ; such may not, however, be the case. 



SCALARIA MTJLTISTRIATA, Say ? 



5. muUistriota, Say, Amer. Conch, pi. 27 ; Sowerby, Thes. Conch, 

 vol. i. p. 108, woodcut; Gould, Invert. Mass. 1870, p. 313, cut. 



Hub. U. States, W. Indies, Mediterranean. 



A single specimen from St. Helena and one from the Canary 

 Islands, in the Museum, apparently belong to this species. They 

 are a trifle narrower in the body-whorl than the above-cited figures. 



