Manwick.—Genus Glycymeris in Tertiary of New Zealand. 71 
Very young shells of, say, 20 mm. height are difficult to separate from 
the young of G. huttoni. The teeth of G. robusta, however, are slightly 
thinner and more horizontal, the hinge-line is narrower, and the anal sinus 
somewhat shallower. The full-grown shell is more inflated than G. huttoni, 
the hinge-line is longer, the anal sinus much weaker, and the teeth are 
longer and more nearly horizontal. The flattening of the posterior margin 
and its extension downwards givé the shell a suggestion of a shortened 
have a fine little pitfall for the palaeontologist. Fortunately, the missing 
shell has been found, so the error can be corrected. The specimen used 
by Suter (1914, p. 36) for his description of C. ponderosa (and now in the 
Dominion Museum) is a Glycymeris robusta. It measures 102 mm. high, 
94 mm. long, and 80 mm. thick (both valves) The measurements and 
locality given by Suter are taken from Hutton's description, and it^ will 
be seen that, while the height of both is 102mm., the length of the 
Cucullaea is 109 mm., which can hardly be said to “ answer very well" to 
that of the 94 mm. length of the Glycymeris. The locality of the shell is 
Glycymeris cordata (Hutton). (Plate 2, figs. 1, 6.) 
1873. Pectunculus (?) cordatus Hutton, Cat. Tert. Moll., p. 28. 
1886. Pectunculus cordatus Hector, Outline of N.Z. Geology, p. 51, 
fig. 6. 
Shell comparatively small, heavy, much inflated, roundly trigonal ; 
beaks very broad and high; anterior end broadly curved, sloping steeply 
from the umbo; posterior end attenuated below; anal depression mode- 
rate; sculpture about 35 obscure ribs with linear interstices ; ligamental 
L 
the mouth of the Wairoa Gorge. 
his species is easily identified by its somewhat small size, and the very 
large, broad beak. 
Records to be eliminated from N.Z. Geol. Surv. Pal. Bull. No. 8 -— 
Page 59. White Rock River, loc. 165 — G. globosa (worn). 
Page 69. Left bank, Waitaki River = G. waitakiensis n. sp. 
None of the other specimens recorded by Suter could be found, so that 
no example of G. cordata was seen from other than the type-locality. 
Glycymeris hurupiensis n. sp. (Plate 2, figs. 4, 5.) 
Shell large, heavy, inflated, subquadrate when young but becoming 
su e 1 1 
