Fintay.—Family Liotiidae in New Zealand Tertiary. 531 
nearest to the type is pukeurvensis ; wever, 18 easl 8- 
tingui by its more fragile test, much more delicate and more numerous 
ribs, and more depressed shape. . stibarochila Iredale has a variable 
number of coarse, prominent, rounded ribs (15 on the last whorl of the 
type, 19 in the author's specimen. Oliver (1914) remarks that * speci- 
mens vary considerably in the number of ribs; the type has them wide 
apart "), but its base is regularly convex, the ribs thinning down gradually 
into the deep, narrowly circular perforation. The author here proposes 
the new subgeneric name Aequispirella to cover the forms of the first 
group, naming as type Scalaria corulum Hutt. 
раза AEQUISPIRELLA n. subgen. 
and less prominent than in the strict forms, being often chink-like, and 
o à 
ype: Scalaria corulum Hutt. (Plate 53, figs. 6a, 6b.) 
KEY то SPECIES. 
Shell depressed-turbinate (Brookula s. str.). 
Shell fairly strong, with a su Бона umbilical кен 
аха рег whorl .. gx và B. funiculata, 
Shell fragile, with no umbilical 
About 23 thin and sharp axials on last NN inter- 
stices 3—4 times their rages В, pukeuriensis, 
About 30 on last whorl, | subequal 
to their interstices .. 2 B. endodonta, 
Shell elerated-tur ). 
Axial ribs considerably diminished in prominence on base. 
ег 40 axials on last whorl .. m -. B. tenuilirata. 
Under 30 axials on last жм 2s -. В. corulum. 
Axial ribs not dimini in inence on base. 
ials thin and sharp, аы generally di distinct .. B. iredalei. 
Axials pres blunt ; spirals very fain .. В. fossilis. 
Lisr or PaPERS CITED. 
Hotton, Е. W., 1884. New Species of Tertiary Shells, Trans. N.Z. Inst, vol. 17, 
IREDALE, T., 1912. Proc. Mal. Soc., vol. 10, p 
—— 1915. A Commentary on Suter's Psi, f ‘the New Zealand Mollusca, Trans. 
x. Z. Inst., vol. 47, pp. 
MESTAYER, Miss M. E, 1916. Preliminary List of Mollusca from Dredgings taken 
off the "see. Coasts of New Zealand, Trans. N.Z. Inst „ Vol. 48, pp. 122-98, 
OLIVER, V R. Be 1914. Mollusca of the Kermadec Islands, Trans, N.Z. Inst., vol. 47, 
PARK, J., Pool. Geology and — Resources of Western Southland, N.Z. Geol, Surv. 
‘Bull, 1 No. rà ang 8. p 
porus, H; 1910. Mal. "Soc vol. 8, p. 24. 
1913. Man. VE Mollusca, p. 158. 
