NEW SPECIES OF TERTIARY MOLLUSCA FROM VICTORIA 123 
Dimensions. — Holotype. Length, 13 -5 mm.; breadth, S-5 mm.; length of 
aperture and canal, 7 mm. 
Observations. — This species differs from T. crassiliratus (described below) 
in being narrower and more elongate in shape, the sculpture is very much 
finer, having numerous axial striae, and fine spirals in the interspaces, and 
the canal is longer. A near ally in general appearance is T. molorthus Hedley, 
but the protoconch is less acute than in the recent species, the radial ribs not 
so bold, and the spirals less numerous. It is also longer in proportion to its 
breadth. 
Locality. — Princetown; same locality as T. (E.) crassiliratus q.v. 
Geological Horizon. — Balcombian. 
Holotype. — No. 14099. 
TropJion (Enatimene) crassiliratus, sp. nov. 
Plate XIV, Fig. 7. 
Shell narrowly ovate, thick, solid. Protoconch of one-and-a-half smooth, 
convex whorls. The spire consists of four convex whorls with an impressed 
suture which is a little channelled; spiral lirae bold, acutely rounded, six on 
the penultimate whorl, narrower than the interspaces; spiral striae absent. 
Body whorl convex, with about twelve well spaced, rounded lirae. Axially, 
the whorls are ornamented with narrow, not very conspicuous costae, narrower 
than the interspaces, and tuberculate where they are crossed by the spirals, 
axial lines in the interspaces ; there are about fifteen costae on the penultimate 
whorl; they fade away towards the base of the body whorl. Aperture 
narrowly ovate, oblique, posterior acutely angled; peristome continuous; 
outer lip thickened, faintly variced, and lirate within, a small callus at the 
anterior end ; columella arched ; canal short, oblique, a little reverted. 
Dimensions. — Holotype. Length, 11 mm.; breadth, 5 5 mm.; length of 
aperture and canal, 6 mm. 
Observations. — The author has not been able to discover any described 
species, either recent or fossil, that bears any close affinity to the one under 
consideration. 
Locality. — Land-slide, about three-quarters of a mile west of the Gellibrand 
River, and about the same distance from the beach. Princetown district. A 
number of examples collected. 
Geological Horizon. — Barwonian. 
Holotype. — No. 14100. Paratype. — No. 14101. 
Family ARCHITECTONICIDAE 
Genus ARCHITECTONICA Roeding. 
Subgenus Discotectonica Marwick. 
Architectonica (Discotectonica) squamogranosa, sp. nov. 
Plate XIV, Fig. 1, la. 
Shell discoidal. Protoconch of one turn, smooth, well defined. Adult 
whorls four, slightly convex; suture incised; periphery acutely keeled. The 
upper surface of each whorl is divided by four spiral lines, the central two 
