374 GASTROPODA. [Pectinibranchia. 



Distribution. Mediterranean, Japan, California. South. America, 

 Falkland Islands, New Zealand, Kerguelen, South Africa. This is 

 a distinctly southern genus. 



Fossil in the Tertiary ; abundant in the Miocene of Europe. 



KEY TO SPECIES. 



A. Shell uniformly white or light brown, without coloured spiral 



bands. 

 a. Shell distinctly spirally ridged, spire of the same height as 



the aperture with canal . . . . . . . . strialn. 



an. Shell inconspicuously spirally striate, spire higher than 



the aperture with canal .. .. .. Marlfnsio.i'i. 



B. Shell with coloured spiral bands. 



a. Spiral bands orange .. .. .. .. flnvt>#cens. 



act. Spiral bands purple. 



b. Body-whorl with 2 broad purple bands . . . . vittata. 



bb. Whorls with numerous narrow purple bands. 



c. Shell rather large, height about 40 mm., spirals 

 distant, height of spire a little less than that 

 of the aperture with canal . . . . linea. 



cc. Shell smaller, height 25 to 30 mm. 



d. Spiral ridges not very prominent, the shell 



almost smooth, not very thick . . littorhioidi.--. 



dd. Spiral ridges distinct, especially on the base ; 

 shell more solid, the close purple bands 

 inconspicuous or absent . . . . StreMi. 



1. Euthria flavescens, Hutton, 1884. Plate 44, fig. 19. 



Pisania flavescens, Hutt., T.N.Z.T., xvi, 1883 (1884), 230. Euthria lineata, 

 var. D, Hutton, M.N.Z.M., 51. E. flavescens, Hutt., Index, 73. 



Shell rather small, ovate-fusiform, banded with orange and spirally 

 striate, solid. Sculpture consisting of low flat spiral riblets, much 

 more raised upon the base, with narrow interstices ornamented with 

 1 or several fine spiral threads ; a few whorls below the protoconch 

 axially costate ; growth - lines distinct, almost straight. Colour 

 white with orange spiral bands, aperture banded with yellowish-brown 

 within, inner lip of the same colour. Spire elevated conical, its height 

 equal to that of the aperture with canal ; outlines very slightly con- 

 vex. Protoconch minute, of 2 smooth whorls, papillate. Whorls 7. 

 the upper ones slowly increasing, the last high, somewhat depressed 

 below the suture, thence lightly convex ; base contracted. Suture 

 impressed, but not deep. Aperture a little oblique, oval, channelled 

 above, with an oblique, recurved, rather short, and widely open canal 

 below, notched at its base. Outer lip somewhat expanded, convex, 

 sharp, much thickened and lirate within. Columella vertical, slightly 

 arcuate, with a few small plaits at its base. Inner lip thin, not broad, 

 spreading lightly over the body- whorl, with a small plait rather far 

 below the suture ; towards the end of the canal the lip is drawn out 

 to a fine point. Fasciole very prominent, lamellate. Operculum horny, 

 yellowish-brown, oval, nucleus apical. 



