120 RECORDS OF THE AUSTRALIAN MUSEUM, 



band on the final whorl. Aperture semilunate. Umbilicus 

 small, half filled by a central spiral callus which expands as a 

 pad ou reaching the margin of the aperture. Height, 9 ; maj. 

 diam., 9 ; min. cliam., 7 mm. 



A few specimens. Nearly related to A r . subcostata, Tenison 

 Woods, but differs by larger size and exsert spire. Named in 

 honour of Dr. J. C. Elkington, our companion on the cruise. 



Marginella columnaria, sp.nov. 



(Plate xxiii., tig. 19). 



Shell rather large, thin, translucent, narrow, subcylindrical, 

 spire slightly elevated. Colour amber. Whorls four. Aperture 

 long, linear, three strong plications on the columella, a thin callus 

 on the inner lip. The outer lip rises above the penultimate 

 whorl from a callus base, which does not quite reach the apex, in 

 a low arch, bends far forward, and then descends vertically. No 

 denticules appear within the lip. Length, 75 ; breadth, 3-5. 



Several specimens. The subcylindrical shape of this species 

 readily distinguishes it from co-generic forms, among winch M. 

 caledonica, Jousseaume, makes the nearest approach. 



MlCROVOLUTA PURPUREOSTOMA, sp.nOV. 



(Plate xxiii,, figs. 20, 21). 



Shell small, rather thin, fusiform, blunt at either end. Colour 

 white, within the aperture stained purple. Whorls five. Shell 

 almost smooth ; a few faint spiral grooves occur on the base and 

 below the suture. Aperture elliptical, outer lip simple, smooth 

 within. 1 n the conventional attitude two plaits are visible on 

 the columella, but turning the shell to show the deepest interior, 

 a small plait appears above and another below- the central 

 couple. Canal short, rounded. Length, 6 ; breadth, 3 mm. 

 Another specimen, length, 8; breadth, 3*5 mm. 



Two specimens. The novelty is distinguished from M. australis 

 by lack of colour, feebler plaits, smaller size, and less breadth. 

 Dall has compared MicrovohUa to Ccmomitra 7 . The characters 

 of the former genus, as now enlarged, seem to us to incline to the 

 Mitrid?e rather than to the Volutidre. 



Dall— bull. Mus. Comp. Zool., xviii., 1JSS9, p. 163. 



