TERTIARY FOSSILS OF NEW ZEALAND. 



MOLLTJSCj^. 



Class — Pteropoda. 



Family — DENTALiiDiE. 



DENTALIUM. 



1. D. pacifiCUm, Sutton, Cat. Marine Moll., p. 5. 

 Localities. — Motanau (tj) . 



2. D. COnicum, sp. nov. Medium size, slightly curved, round, 

 rapidly tapering ; with forty to forty-five low longitudinal ribs, which 

 rapidly diminish in number to about fifteen near the apex ; interstices 

 round, smooth, narrower than the ribs near the base, but broader near 

 the apex. 



Localities. — Shakespeare Clifi"; Broken Eiver (r). 



3. D. nanum, sp. nov. Small, slightly curved, round, gradually 

 tapering ; with about thirteen narrow longitudinal ribs, which run 

 from end to end, but get obsolete towards the base ; interstices round, 

 smooth, broader than the ribs. 



Localities. — Shakespeare Cliff. 



4. D. tenuis, sp. nov. Medium size, nearly straight, thin, with 

 about thirty-five low broad longitudinal ribs ; the interstices round, 

 narrow. 



Localities. — Whangape Lake, Waikato ; Eaglan. 



5. D. mantelli, Zittel, Voy. Novara, PalcE.,p. 45. Medium size ; 

 slightly curved, terete, solid ; with from fourteen to twenty narrow 

 longitudinal ribs near the apex, increasing to thirty towards the base ; 

 interstices smooth ; tapering slowly. 



Localities. — Awatere (Hochstetter) ; Awamoa ; Mount Caverhill. 



6. D. irregularis, sp. nov. Medium size; slightly curved, solid? 

 tapering rapidly ; with about twenty-six narrow longitudinal ribs 

 towards the base, decreasing in number towards the ;ipex ; interstices 

 rounded, about as broad as the ribs, both they and tlu ribs crossed by 

 close transverse stria*. 



Localities. — Kanieri ; Awamoa. 

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