145 
Scala zelebgri, Dunker. 
Scalaria zelebori, Dunker/Verhandl. Zool. Bot.,  Gesell., 
Wien, 1866, vol. xvi., p. 912% Scalaria <zelebori, Frauenfeld, 
Reise, Fregatte Novara, vol. ii., pt. 8, p. 7, t. i., f. 6, 1868; 
Tryon, Man. Conch., volAx., p. 78, pl. 15, f. 75, 1887; Hand- 
list of Aq. Moll. of S. 
This is recorde 






for S. Aust. by Tate, from a single in- 
dividual given to him by Mr. Pulleine, from Encounter Bay. 
No other collectof has taken it, nor has it been found in Tas- 
mania or Victéria. Probably it does not occur here. 
Scala platypleura, spec. nov. PI. iv., fig. 6. a7 : 
ly. 
Shell moderately solid, whorls 8, increasing rapi 
Protoconch two whorls, smooth, convex. Whorls well round- 
ted. Suture deep, simple. Varices running forward below, 
solid, rather low, doubly flanged so that a free edge projects 
slightly on either side, edges minutely cut, surface slightly ir- 
regular, subangular below the suture, 15 on the body-whorl. 
Aperture roundly quadrate, with an oblique gutter at the 
base of the columella. 
_  Sculpture.—Obsolete subdistant spiral incisions mount- 
ing the varices. 
Length, 5 mm.; spine, 2°6 mm.; width, 2°3 mm. 
Hab.—Backstairs Passage 22. fathoms, 2 dead. Type in 
Dx... Verco’s collection. ° - a 
©) The second shell is rather thinner, amd its varices are 
not quite so solid. 
Diagnosis.—From S. zelebori, Frnfd., its nearest ally, it is 
distinguished by more numerous varices, and its incisions, 
which are quite different from the more distant spiral lire of 
the N.Z. form. It differs from S. jukestana, Forbes, in the 
more rapid increase of its whorls, its fewer and much more 
solid varices, which also run forward and downwards instead 
of backward. 
‘Scala acanthopleura, spec. nov. Pl. iv., fig. 8. 3 95- : 
Shell rather solid, whorls 8, rapidly increasing. Prot 
conch conical, smooth, sharp, 3 whorls, homostrophe. Varices 
solid, half the width of the interspaces, numerous, 20 on the 
body-whorl, tuberculate, 4 tubercles or prickles on the penul- 
timate, 7 on the body-whorl, microscopically axially striate. 
Interstices very minutely closely spirally lirate, lire mount- 
ing the varices. Aperture round, with a shallow gutter at 
the junction of the basal lip and the columella, which is thus 
slightly twisted and toothed. The varices wind round the 
columella as 7 oblique plaits ceasing at the inner lip, which 
here is thin and erect. 

