Hurron—7he Plhocene Mollusca of New Zealand. Ta 
Macrra #quitaTera, Deshayes, Pro. Zool. Soc. 1853; Voy. Erebus and Terror, Moll. 
pl. u. fig. 10 ; Reeve, Conch. Icon. fig. 14; 47. elegans, Hutton, Cat. Tertiary 
Moll. of N.Z. p. 19 (juv.). 
Locality.—W anganui, Petane. 
Macrra crassa, Hutton, Trans. N.Z. Inst. Vol. XVII. p 322. 
(Plate vit. fig. 82.) 
Shell trigonal, sometimes nearly as high as long, massive, inequilateral, 
rather rudely concentrically striated. Anterior dorsal margin straight, or slightly 
coneave ; posterior dorsal margin slightly convex, longer than the anterior 
margin, the posterior slope barely keeled ; ventral margin curved. Left valve 
with a single strong elongated lateral tooth on each side. Right valve (?). 
Pallial sinus very shallow and rounded. Length 40mm.; height 35mm. 
Locality.—W anganui. 
J g 
Genus STANDELLA. 
Key to the species. 
Shell oval, thick, compressed 
Shell ovate, thin, inflated ... S. ovata. 
Shell sub-orbicular, thin... hee et me ee Ss HUES: 
S. elongata. 
STANDELLA ELONGATA, Quoy and Gaimard, Voy. Astrolabe, Zool. III. p. 518, 
pl. xxx. figs. 1, 2; Reeve, Conch. Icon. Wactra, fig. 43 ; M. notata, Hutton, 
Cat. Marine Moll. of N.Z. p. 64. 
Locality.—Wanganui, Petane. 
STaNDELLA ovara, Gray, in Dieffenbach’s “New Zealand,” IT. p. 251; Voy. Erebus and 
Terror, Moll. pl. u. fig. 2; Reeve, Conch. Icon. Mactra, fig. 30; MZ. inflata, 
Hutton, Cat. Tertiary Moll. of N.Z. p. 18. 
Locality.— Petane. 
SranDELLA RuDIS, Hutton, Cat. Tertiary Moll. of N.Z. p. 19. 
(Plate vin. fig. 83.) 
Shell sub-orbicular, thin, compressed and rather sinuated ; rudely concen- 
trically striated. Anterior side rather shorter, its dorsal margin straight. 
Posterior dorsal margin arched. Anterior lateral tooth of the left valve short 
and high. Lower margin irregular in outline. Pallial sinus deep, rather 
descending, rounded at the apex. Height 60mm. ; length 60mm. 
Locality.—W anganui, Patea. 
