94 
blunt-edged, edentulous. Columella with a strong terminal 
spiral plait running out to form the left margin of a deep an 
somewhat effuse canal. 
Length, 1:5; cerae width, 1 mm. 
Tasmania (W. F. Petterd /). 
This species and M. lubrica are characterised among recent 
Marginellide by their uniplicate columellas, but that type has an 
ancestral form in an Eocene species at Muddy Creek. In shape, 
M. ovuleformis is somewhat intermediate ie M. Flv indersi, 
with two plaits, and M. Hallii, with seven plaits; M. Isseli is 
also near, but it has four plaits, and is not so attenuated at the 
ends. 
Donovania fenestrata, spec. nov. 
Shell moderately stout, narrow lanceolar-fusiform, pale-fawn 
colour. Pullus papillary of ‚three N convex smooth 
strength, which produce square deep fenestrations; there are 
five spiral ridges, and on the penultimate whorl there are about 
twenty axial o 
Last whorl er with seven spiral Fa to the n 
three on the concave area below it, and four 
Aperture roundly oblong, higher than des outer lip entire, 
vertical in contour, simple, ridged inside, corresponding with the 
external furrows. Columella arched to its base, thence running 
out abruptly and obliquely to form the left boundary of a short, 
wide, A aiU up-turned snout. 
th, 8; width, 2-75; height of aperture, 2:75 mm. 
East Coast of Tasmania (W. x May). 
Natica Tenisoni, nom. mutand. 
N. nana, Ten.-Woods, P.R.S., Tasm., 1876, p. 149, non Möller. 
Long Bay; Ten.-Woods. 
Thylacodes caperatus, spec. nov. 
Shells agglomerate, reddish brown; whorls embracing and 
reciprocally adherent, forming a short broad cone, ornamented 
with — rounded, irregularly-sized, transverse ridges ; suture 
distinet. The free tubular portion long, much n arrowed, irregu- 
arly i circular in section; ornamented as the rest of the 
shell. 
Diameter of base, 4 to 5; height of cone, about 2; length of 
tube, up to 10 ; its diameter, lmm 
amar Heads, Tasmania; W, F. Petterd . f: 
Animal unknown, but from its resemblance to some Tertiary 
species in Australia it is associated with Thylacodes rather than 
with Vermetus. 
