1 I _. "ENDEAVOUR' SCIENTIFIC RESULTS. 



defined by narrow , shallow grooves. On the last whorl there 

 are three sulci above and twenty-five below the shoulder, 

 anteriorly these become more crowded and oblique. The 

 whole shell is traversed by delicate growth-striae. Colour 

 white, in a few examples faint brown dashes appear on the 

 shoulder. Aperture linear. Whorls six, including the proto- 

 conch. Length 8'5, breadth 4 mm. 



Probabh' the species attains a larger size, but, as the apex 

 is the chief distinction, larger examples would be recognisable 

 from the present information. Apparently its nearest relation 

 is ('. convexus, Harris, ^ from the Victorian Eocene, of which 

 I have not seen specimens. Compared with C. anemone, 

 Lamarck, the apex of C. superstes is more mamillate, and the 

 spiral grooves are stronger; the shoulder of the spire whorls 

 are not tuberculate in superstes, as they are in anemone. 



Hi'h. — Sexeral specimens, mostly young, from 100 fathoms 

 fort\ miles south of Cape Wiles, South Australia. 



MiTRA STADIALIS, Sp. nov. 



(Plate XX., fig. T,y.) 



Shell small, thin, fusiform. Colour white, opaque and 

 glossy abo\e the horizon of the lip insertion, below that level 

 dull and subtranslucent, a spiral pair of orange threads run 

 along the centre of each whorl. \Vhorls seven, of which two 

 form a small and glossy protoconch. Sculpture : Low, 

 rounded radial ribs, about eighteen to a whorl, their breadth 

 apart, tra\erse the upper whorls and cease at the subtrans- 

 lucent zone. On the upper part of the whorl are a few lightly 

 engraved spirals, the most conspicuous following the pair of 

 colour lines. Six slight and crowded spirals run along the 

 tip of the snout. Aperture narrow, canal short, bent, outer 

 lip lirate within, inner lip a thin callus. Plaits four, deep- 

 seated, upper nearlv horizontal, lower oblique. Length 8' 5, 

 breadth 3 mm. 



This species is allied to M. tasnuuiica. Ten. Woods, but is 

 narrower, with slighter sculpture. 



llah. — Several specimens from 100 fathoms forty miles 

 .south of Cape \\'iles. South Australia. 



RlXGICLI.A MKRTDIOXALIS, Sp. nov. 



(Plate XX., fig. 38.) 

 vShell ovate, thin, glossy, the more solid parts opaque white, 

 the less solid translucent pearl grey. Whorls five. Sculp- 

 ture : The whole shell is girt with flat-topped spiral ribs parted 



1 Harris-Brit. Mus. Cat. Tert. Moll. Austr.. i.. 1897. p. 31, pi. ii., f. 5. 



