SCALARIDA, 69 
Genus, TRICHOTROPIS—Broderip. 
Shell turbinated, thin, whorls keeled ; mouth large, columella obliquely 
truncated. 
T. inornata, Hutton, CALM. p. 26; T. clathrata, Sow. Conch. Le. 
f. 10; Voy. Erebus and Terror, Moll. pl. 1, f. 21. Small, cancellated, 
spire produced, without fringes; a short anterior canal; pale brown or 
white. 
Length, ‘43 ; breadth, ‘25 ; angle of spire, 40°. 
Auckland to Stewart Island. Chatham Islands. 
The following is Sowerby’s description :—Shell fusiform, covered with 
a thin pale epidermis, cancellated with slightly beaded spiral ribs, and 
interstitial regular small concentric ribs; spire accuminated, whorls 
angular, carinated above; aperture sub-trigonal, anteriorly acuminated ; 
umbilicus narrow. 
SECTION—HOLOSTOMATA. 
Peritreme entire, no siphon. Herbivorous. 
Sub-Section—Ptenoglossa. 
Rachis teeth none, laterals numerous ( 0.0.00 .) 
FAMILY—SCALARID:. 
Lateral teeth simple, unguicular. ‘Tentacles subulate, with the eyes 
on the outer side of their bases. Mantle enclosed, with a rudimentary 
siphonal fold. Foot obtusely triangular, grooved below, furnished in 
front with a fold or mentum. Operculum horny, spiral, of few whorls. 
Shell spiral, turreted, variced ; aperture entire, without any notch or canal. 
Genus, SCALARIA—Lamark. 
Shell solid, lustrous; whorls convex, sometimes separated, orna- 
mented with numerous longitudinal ribs ; aperture round, peritreme con- 
tinuous, thickened. 
S. zelebori, /vauenfeld, Reise der Novara, Moll. pl. 1, f. 6. Shell 
pyramidal, accuminate, imperforate, white ; whorls about ten, rounded, 
transversely obsoletely grooved, suture deeply disjoined ; varices numer- 
ous, rather thick, erect, rather turned back, undulately crenated, sub- 
angular near the suture ; last costula distinctly spirally marked ; aperture 
sub-rotund. 
Length, ‘95; breadth, -32 inch. (Frauenfeld.) 
Auckland. 
Frauenfeld refers this species, with doubt, to Adams’ sub-genus 
Opatia, in which the shell is turreted, and imperforate, the whorls not 
disunited, the last with a conspicuous spiral ridge round the umbilical 
region. 
K 
