66 Transactions. 
In the cases cited above, as well as in the rest of this paper, the specimens 
have actually been handled. In the case of many other occurrences noted 
by Suter the specimens are missing from the Geological Survey collections ; 
in fact, no undoubted specimen of G. laticostata has been seen from strata older 
. 
than Wanganuian 
Cardium brachytonum Suter. 
N.Z. Geol. Surv. Pal. Bull. No. 5, p. 17, pl. x, fig. 5, 1917. 
The holotype on examination proves to be the cast of a Glycymeris, pro- 
bably laticostata. In the plate reproduced in Bulletin No. 5 the extremities 
of the hinge-area have been blocked out by a black background. 
Glycymeris traversi (Hutton). (Plate 1, fig. 8.) 
1873. Pectunculus traversi Hutton, Cat. Tert. Moll., p. 28. 
1914. Glycymeris traversi (Hutton): Suter, N.Z. Geol. Surv. Pal. 
ull. No. 2, p. 35, pl. iv, figs. 2a, 2b. 
In his description Suter gives the locality of the lectotype as Chatham 
Islands. The actual specimen in the Dominion Museum is labelled “ Loc. ? " 
However, the shell is almost certainly from Chatham, so Suter’s statement 
may stand. 
Buchanan’s drawing of this shell, reproduced by Suter (see above), 
does not represent accurately the wide interstices between the ribs. From 
the drawing one would take the shell to be inseparable from 6. laticostata ; 
this, however, is not so. The interstices are equal in width to the ribs, 
even at the margin of a 22 in. shell; thus the ribs in G. traversi are noticeably 
narrower than in G. laticostata. As to Suter's statement that the former 
is less inflated than the latter, the present examination does not bear out 
the observation. The inflation is practically the same in shells of equal 
size. There is very little difference in width between the anterior and 
Glycymeris lornensis n. sp. (Plate 1, figs. 4, 9.) : 
Shell medium-sized, suborbicular to longitudinally oval, equilateral ; 
i h i 
margin but become obscured in some specimens by strong growth-lines, 
the interstices rounded and narrower than the ribs ; margins weakly crenate ; 
hinge-plate deeply encroached on by the ligamental area, even in sma 
individuals, leaving three or four teeth on each side; ligamental area 
relatively large, steeply inclined, and very closely grooved by about 12 
well-incised lines. 
Holotype in collection of N.Z. Geological Survey. 
Height, 40 mm. ; length, 40 mm. ; thickness, 14 mm. (one valve). 
