Marwick.—-Genus Glycymeris in Tertiary of New Zealand. 73 
interstices, becoming obsolete towards the margin, where there are numerous 
waved growth-lines; ligamental area short and narrow, almost smooth, 
with three scarcely discernible ligamental grooves; teeth about 10 on each 
side, fairly short and stout, bent in the middle, where there is on each side 
a short striated facet with raised edges. 
Height of holotype (complete individual) 19 mm.; length, 53 mm.; 
thickness of one valve, 16 mm. 
Holotype in collection of N.Z. Geological Survey. 
Remarks.—This species may be distinguished from the three preceding 
ones by its ovate shape, very much lower beaks, moderate inflation, and 
small, almost smooth, area. 
Localities :— > 
875—Manaia beach. (Holotype.) 
Whakino, Hawera (Marshall and Murdoch). 
1018—Cliff half a mile north-west of mouth of Patea River. 
? 190— Upper band of Petane limestone." (Fragmentary speci- 
men. 
? 736—“ Petane and Scinde Island." (Fragmentary specimen.) 
Lower end of Starborough Creek, Awatere Valley (Thomson). 
218—Motunau. (Poor specimen.) 
219—Motunau. (Poor specimen.) 
126—A watere Valley. 
Motunau beds, Middle Waipara (Thomson). 
Motunau beds, Lower Waipara (Thomson). 
Motunau beds, Weka Pass (Thomson). (Fragme 
equilateral shell with flat ribs and wide shoulders. It is neither (7. lati- 
costata nor manaiaensis, but apparently belongs to Glycymeris sp. [see below, 
p. 74 (d)]. 
Glycymeris rapanuiensis n. sp. (Plate 3, fig. 1; Plate 4, fig. 1.) 
ligamental grooves; teeth short, curved, with short striated facets at the 
angle. 
Height of holotype (right valve), 45 mm. ; length, 52-5 mm. ; thickness, 
16 mm. 
Holotype in collection of N.Z. Geological Survey. 
Localit і 
y-—895—Mouth of Rapanui River. (Collected also by Mr. L. 
Grange.) 
