530 Transactions. 
(protoconch 14, distinctly marked off); upper whorls rather discoidal, the 
shell appearing wheel-like from above. Suture deep. Aperture almost 
free, subeircular, peristome continuous, columella arcuate, not reflexed. 
Height, 1-1 mm. ; length, 1-35 mm. 
. Holotype and about thirty paratypes, from Pukeuri, in the author's 
collection. Also found at Ardgowan and Target Gully, but not nearly so 
plentiful. 
In its depressed form this shell resembles B. funiculata, but is amply 
distinguished by its altogether more delicate appearance, absence of 
umbilical keel, and several other details. It may be noted that its 
whorls descend much more rapidly than in the Pliocene shell, so that 
although its protoconch is less raised above the encircling whorl the 
penultimate whorl is much more prominent than in B. fumiculata. In 
this it closely accords with the type of the genus, B. stibarochila Iredale, 
and except for its much more delicate facies and more depressed form it is 
extremely like this species. 
Brookula endodonta n. sp. (Plate 53, figs. 7a, 70, Тс.) 
Shell minute, thin, depressed-turbinate, perforate. About 30 rounded 
interstices, more distinct than in B. funiculata but less so than m- 
B. pukeuriensis. Axials ribs flattened down a little on base, and this, 
together with their greater number, gives base of this species a much 
smoother appearance than in B. pukeuriensis ; but in other shell details— 
e.g., umbilicus, aperture, suture—there is practically no difference between 
the two species. The spire is, however, rather lower, body-whorl more 
regularly rounded, and protoconch (11 whorls) slightly smaller. 
Height, 0-7 mm. ; length, 0-9 mm. Height, 0-9 mm. ; length, 1-2 mm. 
Types (two almost perfect juvenile shells) and six patatypes, from Target 
Gully, in the author's collection; also one specimen from Pukeuri. One 
21). 
one of the adult shells are complete, but some of the жа ате 
nearly perfect; practically all possess 30 axial ribs per whorl. 'The species 
ery close to B. pukeuriensis, differing mainly in its more depressed shape _ 
and greater number of axials, resulting in much closer and finer ribbing. 
Of the species of Brookula, three (B. fossilis, B. corulum, and B. fum- 
culata) seem to be restricted to the Pliocene, while of the four Miocene 
species only two have so far been found at more than one locality; the 
ange of species seems therefore to be small, and they should prove of con- 
siderable «ве. The author regrets that he has had no opportunity 0 
examining much shell-sand from horizons between the Awamoan 
еа; post у several more new forms would be found in such 
M E сн с. = vwd А кы evolutionary gap between the Pliocene and P. 
A rather curious point is that 
en 
i ical 
Brookulas than the three Plice these Miocene species are more S : 
ed m w umbilicus, y с. 
continued : ; subdiscoidal early whorls, leading 0 ^ — 
не атаа spire-angle with growth, and a rather wide and | 
