406 
This species differs chiefly from the last in the elliptical distant 
pores, the slit being bordered by a narrow elevated undulated line 
on both sides. Except in the last whorl, the slit seems situated on 
the top of a feeble carina. Although the shell is smaller, the aper- 
ture is larger than in the preceding. 
6. Tenaconus (SiL1QUARIUS) AUSTRALIS, Quoy & Gaimard. 
Var. a. SCALARIFORMIS. 
T. anfractibus 6 subregulariter spiraliter contortis, tenuiusculis, 
postice angulatis, inferne liratis, oblique obsolete sulcatis, trans- 
versim conferte laminato-fissuratis ; apertura dilatata. Rima 
utrinque undulato-dentata, dentibus in anfr. primis tangentibus 
unde poris rotundis approximatis. Color candidus, inferne 
Serrugineus ad basin teste. 
Long. 213 cm., diam. ap. 11 mm., alt. 14 mm. (circiter). 
Operculum subcylindricum medio paululum contractum, gyris cir- 
citer 13, truncatum (casu?); area planiuscula, centro impresso 
sed non umbilicata ; segmentis radiantibus angustis circiter 15 
interdum obsolete bifidis, arcuatis vel leviter sigmoideis sulco 
peripherico profundo circumscriptis ; lamina marginali angusta 
dilute castanea, margine radiatim dense lirato, lirts in cilia 
brevissima euntibus. 
Diam. 6 mm., alt. 8 mm. 
Australia (coll. Cuming. ), specimen unicum. 
The specimen looks somewhat like Scala scalaris, and is not un- 
like the top of the figure 1 7. pl. 1 in Chenu’s ‘ Illustrations.” I am 
not quite sure that this is not specifically different from S. australis 
in Chenu’s ‘ Illustrations.’ 
Var. 3. MULTILIRATA. 
T.. spiralis irregulariter contorta, longitudinaliter liris angustis- 
simis perspicuis, interstitiis lirula intercalante. Rima aper- 
turam versus clausa; poris rotundis plerumque fissura con- 
junctis in anfr. primis 3 clausis ; apex decollatus, dissepimento 
conoideo clausus. 
Long. 213 cm., diam. ap. circiter 10 mm. 
Australia, specimen detritum in coll. Dunkeri. 
Var. y. ran1aTA, Adams, Genera, t. 39. f. 5 d. 
T. lave spiralis, longitudinaliter liris angustis parum prominen- 
tibus ; rima aperturam versus simplex, utrinque acuta, in anfr. 
superioribus utrinque undulato-dentata, dentibus sepe tangenti- 
bus unde poris ovalibus, in anfr. 5-6 primis clausis. Color 
teste albus, strati externi ferrugineus ; rima utringue lineis 
castaneis marginata. 
Long. 30 cm., diam. ap. 12 mm. 
Siliquarius anguilus, Montfort, fig. p. 39, simillima. 
Operculum cy.indricum late truncatum (casu?) gyris 6 ; area in- 
flata, centro profunde immerso, segmentis radiantibus angustis 
