150 
formly concave between the angulations; with axial coste, 
valid, rounded nearly as wide as the interspaces, and spiral 
liree, wider anteriorly, wider than their interspaces, crossing 
the coste, six above the angulation, and two below it: fine 
accremental striz under the lens. Suture distinct, linear, 
undulating, convex between the costa. Body-whorl oblong 
with two median rounded carinz, the upper larger, more 
prominent, forming the angulation (in the spire whorls), the 
lower producing the upper margin of the suture, tubercu- 
lated by the axial cost, which cease at the lower one; six 
spiral liree above them, two between them, and ten of vary- 
ing size below them on the concave base. Aperture subtri- 
angular, outer side straight, inner sigmoid. Outer lip thin, 
slightly excavated just below the suture for one-sixth of its 
extent to form a shallow sulcus, with a margin feebly thick- 
ened and everted, then excavated again to the upper carina, 
an acute short projection between the two excavations; edge 
crenulated by spiral lire and carine. Basal lip begins at the 
lower carina and is concayo-conyex to the attertor notch. 
Columella concavo-convex from behind forwards. Aacd 
Dimensions.—Length, 91 mm.; width, 2°7 mm.; aper- 
ture, 2°8 mm.; body-whorl, 4°8 mm. 
Locality of type, St. Vincent Gulf, 22 fathoms with 6 
other examples, 100 fathoms off Beachport, one broken, 110 
fathoms 6, 130 fathoms off Cape Jaffa, 2 broken. 
Ornament.—The type is white, but a co-type shows a 
brown tinting of the two carine and of that part of the axial. 
—coste connecting them, most marked at the tubercle3Sof4fine- 
tion. This shell is 10°1 mm. long, and shows fifteen spiral 
liree at the base. 
Observations.—-The living mollusc has not been taken, so 
the radula and the operculum (if any) are not known. Its 
generic position is very doubtful, and even its family is ques- 
tionable. Some conchologists who have seen it refer it with 
doubt to the Terebridw, and propose the creation of a new 
genusefor its reception. Its infra-sutural _ sulcus, .,barely 
thickened at the margin, suggests Pleurotomide, but it is diffi- . 
cult to find a genus for it here. 
Expranavion or Prare IV. 
™ Hig. 1, 2, Operculum of Scala morchi, Angas. mer .. \O% eee ee 
y Say ms , 4, 5, ? Terebra dyscritos. oer SEA IDIISS A ‘ 
\ - , Scala platypleura, n. sp., Verco. 
5, valida, n. sp., Verco. 
» 5, acanthopleura, n. sp., Verco. 
,10,, invalida, n. sp., Verco. 
» ll, Cingulina diaphana, n. sp., Verco. 
£9 COD ©. 
