526 Transactions. 
shallower water, with the subsequent disappearance, may be due to pursuit 
ня emer or perchance a new danger that assailed them. Whatever the 
‚ the shell is probably very rare in New Zealand, though the writer 
aee seen a specimen from the collection of Mr. A. W. B. Powell, of Auckland, 
dredged in 25-30 fathoms in the Bay of Plenty, where the shell may perhaps 
be less rare. The species is easily distinguished from C. labiata (Perry), 
which it resembles in smoothness, by its widely open umbilicus; much 
larger, more inflated, and thinner test; total absence of keels and nodules, 
and presence of deep infrasutural spiral grooves; and total absence of 
serti on the outer lip. From C. pyra (Lamk.), to which it is more 
early allied, it differs in its rather greater size and thinner shell; its 
ind» convex whorls, without nodules, its simpler spiral sculpture and 
total absence of basal grooves and crenulations of the outer lip; the higher 
ане (ratio height of spire to height of aperture in the four shells measured 
91, :37, -39, -42, while the maximum ratio observed in C. pyra is 
under 4) ; characteristic colour, and the disposition of the canal, which is 
not cut back nearly so far nor so much recurved, is wider, and has its 
termination squarish instead of rounded. 
The Family Liotiidae, Iredale, in the New Zealand Tertiary: Part 1, 
the Genus Brookula. 
Ву Н. J. Fixzav, M.&., Edmond Fellow of Otago University. 
[Read before the Otago rre 12th December, 1922 ; received by Editor, 31st December, 
gy issued separately, 30th July, 1924.] 
Plate 53. 
corulum m ( utt.) is, Leve not a typieal member of this genus: the 
smoot are abnormal. Iredale (1915) 
has also proposed the genus Peers to contain such forms as Suter's Liotia 
polypleura Hedley, L. rotula Suter, and (? 
and the exact difference between den Oyelastreiiella etae Suten, 
t sW. 
Dominion Museum, that course was ad 
- should be rested to subdiscoidal f. а a ie Meo uon бери 
. Apart from B. corulum (Hutt.) no ion of the genus have u till now 
el recorded from our Tertiary beds ; six new putos are here proposed. 
pecimens are often by no means uncommon in washings and sievings ; 
5 RHOD nx 
COE RECTA CULA AIDS EI rS TP P VUA + 
Me ERU E EUN 
