106 
the existing fauna of Kerguelen Island and other similar 
Southern positions. The Zwrritella resembles 7. Hookeri from 
ke: Antarctic, without locality ; the Natica has no near analogue, 
the genera Chione and Gari are not represented in high 
Saber latitudes ; nevertheless, it is*not en that the 
two Ape of Mytilus may belong to recent spec 
auna indicates nothing specialised, ciat that of dis- 
tivities of species, to separate it from that of a moder 
deposit ; and in the absence of distinctive genera of Paleogene 
age, I must refer the deposit to Neogene without any subordinate: 
assignment. 
Nores oN THE Fossirs. 
Natica Tremarici, spec. nov. Pl. ii., figs. 4a-4c. 
Shell AT hemispheric ; whorls four and a half, sa regen 
with growth-lines, but without spiral sculpture. Apertu 
lünáfé. Umbilicus wide; a small callus is reflected over hi 
upper portion of the umbilicus. 
In this fossil species is like the recent N. ampla and 
N. Incei of the same size, but the spire is obtuse and less elevated 
than in N. Incei, more elevated than in N. ampla, and regularly 
convex below the suture; the umbilicus is somewhat similar to 
that of N. ampla. 
a 19 and 12; height, 10 mm. 
Turritella Hallii, spec. nov. Pl. ii., figs. 3a-35. 
Shell broadly conical, a little rounded at the basal angle and 
on the base. Apex not knowr. Whorls ten, sica d much 
The ornament consists of two strong keels, one at Fee margin 
of the side, dividing each whorl into three approximately equal 
widths; the space between the keels is flattish or slightly con- 
cave. In addition there are fine spiral threads, usually alter- 
naternately large and small, six on the intercarinal space, and 
six on each of the sutural slopes. 
Aperture quadrately oval, higher than it is broad ; outer lip. 
not preserved, though there’are traces on the anterior part of the 
last whorl of eurved growt th lines, ae a broad shallow 
sinus; columella somewhat arched and thickened (not dilated at 
the front). 
Length, 39; breadth, 12:5 ; height of last, whorl, 12 m 
Among the few bicarinate species of the genus it Mun some 
pproac roach to T. ambulacrum, Sow., Tertiary in Patagonia and 
Chatham binds which has the whorls not so quadrate, and the 
encircling ribs are of unequal size. It simulates 7. Zookeri, 
Reeve, an Antarctic species, but, judging by the figure, it is 
