
COTTON—SOME TERTIARY Fossitt. Mo_iutcs 667 
LATIAXIS DISSITUS sp, NOV, 
Plate xxi, figs, 9, 10. 
Shell trigonal, spive depressed below the upper part of the body whorl; body 
whorl rather shavply roundly angulate at the top, the angle forming an obtuse 
keel set with a single row of large nodules increasing in size with the growth of 
the shell; sculpture of an unusual pattern of close wrinkled spirals; aperture 
rather small, narrowly ovate; canal long, narrow; umbilicus wide and deep, the 
outer niargin weakly imbricate ; whorls close, but in the unique specimen the body 
whorl near the aperture begins to show the first stage of separation from the spire 
whorls, ITcight 45 mm., diameter 389 mm, 
Loc.: Ahatioirs Bore, holotype, Adelaidean. 
Remarks: The specimen, which is not (nite adult, would probably measure 
say, 00 to 60 mm., in height when fully grown. Compared with the Recent 
Japanese genotype L. mawae, the present species is heavier, less strongly con- 
strueted in the middle, while the sculpture is peculiar and the spire of different 
formation, It bears a resemblance to some larger species of Coralliophila. 
NOTOTEREBRA gen. nov. 
CGenolype: Terebra albida Gray 18384. Recent, Victoria. 
Shell ivory white, seldom brownish white, sometime with a row of small round 
snbsutural brown spots; shell rather wide, whorls flat, suture subimpressed, with 
a depressed subsutural band searcely visible in the earlier whorls, but becoming 
very marked in the later ones; whorls smooth, except for sinuous, oblique 
aceremental striae which are sometimes, gathered into groups so as to form 
obsolete, very flat, low angular riblets, most valid just below the suture ; protoconch 
of one-and-a-half whorls, slightly swollen, smooth and round. 
Recent; Victoria, South Australia, Tasmania. 
Fossil : Pliocene and Miocene of Australia. 
Remarks; Species belonging to this genus are the Tertiary fossils, 7. simplex 
Tenison Waods and I. angulosa Tate. The former is said to retain a suggestion 
of the colour spots sometimes seen in Recent specimens of 7, albida. 
UMBILIA CERA sp. nov. 
Plate xxi, figs. 1, 2, 3. 
Shell of small size for the genus, ovate; dorsum elevated ; highest near to the 
posterior end, then convex to the anterior end; spire sunken into an umbilicus ; 
anterior and posterior canal comparatively short, each slightly turned to the left; 
