72 Transactions. 
convex ; anal depression moderate; sculpture about 30 broad, flat radials 
with linear interstices generally obscured towards the edge of the adult by 
strong, waved growth-lines; inner margin coarsely crenate; ligamental 
area long and wide, with about 6 lightly-incised ligamental lines; teeth of 
variable strength, 10-12 on each side. 
Height of holotype (right valve), 58mm.; length, 63 mm. ; thickness, 
5 mm 
Localities .— 
1037—Sandstone, Hurupi Creek, Palliser Bay. 
1039— Basal grits, Whakapirihika, east shore, Palliser Bay. 
Holotype in collection of N.Z. Geological Survey. 
This species may be distinguished from G. huttoni by its fewer and 
broader ribs, by its less-pronounced anal depression, and the ovate shape 
of the adult shell. 
Glycymeris kaawaensis n. sp. (Plate 2, figs. 2, 3.) 
Shell large, heavy, inflated, rounded, trigonal almost equilateral ; beaks 
very prominent, anterior dorsal margin sloping fairly steeply to the convex 
anterior end ; posterior dorsal margin short, posterior end broadly convex ; 
anal depression very weak; sculpture 30-35 broad, flat ribs with linear 
interstices, crossed by strong waved growth-lines towards the margin ; liga- 
mental area moderately long and very wide, with 6 somewhat shallow 
ligamental grooves; teeth short and stout, posterior ones curved; the 
olotype has 17 in front and 13 behind, 5 at each end free of the area (this, 
however, seems an exceptionally large number, as paratypes have as few 
as 3 whole teeth at each end and 2 or 3 rudimentary ones truncated by 
the area). 
Height of holotype (right valve), 61 mm. ; length, 65mm. ; thickness, 
mm. 
Locality.—996— Kaawa Creek. 
Holotype in collection of N.Z. Geological Survey. 
Remarks.—This species can be distinguished from G. huttoni and 
G. hurupiensis by its much more sloping shoulders, and the short, curved 
posterior teeth ; from the former also by its anal depression being prac- 
tically absent, and from the latter by its slightly narrower ribs. 
his is the shell identified by Suter as G. globosa (Hutton): J. A. Bar- 
trum (1919, p. 104). 
Although most of the large shells are thick and heavy, giving a strong 
resemblance to G. љи отт, this does not show the true nature of the species, 
which is much closer to G. manaiaensis. This is shown not only by the 
shape of the growth-lines of youthful stages, but also by some large indi- 
vi 
Axes iod AU rl ee is ee eS 
duals which have not become thickened. One specimen, collected by | E 
Mr. Bartrum, has a low beak and is very like a large G. manaiaensis. The 
area, however, is short and broad, as in other Kaawa shells. Viewed 
externally, the beak is seen to be somewhat narrower, the shoulders are 
more sloping, and the ribs fewer in number. 
Glycymeris manaiaensis n. sp. (Plate 3, fig. 4; Plate 4, fig. 4.) 
Shell large, of moderate weight, obliquely ovate, inequilateral, moderately 
inflated ; beaks small, not projecting much above the dorsal margin, 
anterior end practically a semicircle, posterior end somewhat attenuated 
ventrally ; anal depression absent; sculpture 30-35 flat radials with linear 
