456 Transactions. 



Hutton ; (9) Magellania mar shalli, no v. sp.* ; (10) Cucullea alta, 

 Sowerby ; (11) Pinna distans, Hutton; (12) Pinna neozelanica, 

 Gray; (13) Pecten beethami, Hutton; (14) Pecten chaihamensis (?), 



Hutton; (15) Pecten diffluxus, Hutton; (16) Pecten fischeri, 

 Zittel ; (17) Pecten hochstctteri, Zittel ; (18) Pecten williamsoni, 

 Zittel; (19) Lima colorata, Hutton; (20) Crepidula (Janacus) 

 unguiformis, Lamarck ; (21) Natica callosa (?), Hutton ; (22) 

 Voluta, sp. ; (23) Notidanus gigas, Sismonda ; (24) Odontaspis 

 incurva, Davis, sp. ; (25) Lamna (?) lanceolata, Davis; (26) 

 Lamna, sp. ; (27) Oxyrhina von haastii, Davis; (28) Trijgon (?) 

 ensifer, Davis ; (29) Squalodon gratelowpi (?), Pedroni. 



Band B. — As we descend from the base of the pure white 

 limestone C the rock becomes more and more glauconitic, and 

 less and less calcareous, till it passes gradually into the glau- 

 conite sands A, 35 ft. below. The transition is very gradual, 

 and no definite line can be assigned as the junction between 

 the pure limestone C and the glauconitic limestone B. Planes 

 of stratification are well marked in this band, the laminse being 

 horizontal and about 3 in. apart. This band is not quarried, 

 as the large proportion of glauconite renders it of inferior 

 quality. 



The fossils identified in this band were — (1) Orbitolites, sp. ; 

 (2) Cristellaria rotulata, Lamarck ; (3) Textularia agglutin- 

 ans (?), d'Orbigny ; (4) Cidaris, sp. ; (5) Serpula, sp. ; (6) Pec- 

 ten diffluxus, Hutton ; (7) Pecten hochstetteri, Zittel ; (8) Lima 

 colorata, Hutton ; (9) Odontaspis incurva, Davis, sp. ; (10) 

 Lamna (?) lanceolata, Davis ; (11) Carcharodon auriculatus, 

 Blainville. 



Band A. — This, the glauconite sand, is composed of small 

 rounded grains of glauconite with an admixture of quartz and 

 calcite. It is devoid of stratification, and its thickness could 

 not be determined. 



* Magellania marshalli. — Length, 2 in. ; breadth, 1 -95 in. ; height, 

 0-80 in. Shell orbicular, smooth or with a few concentric markings near 

 the margin ; margins even ; valves equally convex ; beak solid, slightly 

 curved and laterally keeled ; foramen complete and of moderate size ; 

 deltidium large, conspicuous, and formed of two plates ; loop elongated 

 and reflected ; medial septum of dorsal valve very prominent. This 

 species is most closely allied to M. concentrica, which Hutton (Cat. Tert. 

 Moll. N.Z., p. 35) describes as " shell oval, concentrically striated . . . 

 length, 1-65 in. ; breadth, T30 in. ; height, - 80 in." M. marshalli differs 

 in being orbicular and natter in shape, and in not having concentric stria- 

 tions over its whole surface. The only other described species to which 

 M. marshalli is at all similar is 31. lenticular is, from which it is distinguished 

 by the characters of beak and foramen, which in the latter are — " beak 

 small, recurved ; foramen very small." This is a hitherto undescribed 

 species, and I have much pleasure in naming it 31. marshalli, after Dr. 

 Marshall, of Otago University. 



