199 



The following were collected by Hartz on August 9"^ on 

 Mount Nathorst near Point Constable: — 



a) An oyster-bank occurring at about 1625 feet (510 

 metres) above sea-level, a local development of b), con- 

 tained : — 



Ostrea eduliformis, Schlot., many specimens. 



Ostrea cf. edidiformis, Schlot., a few specimens. 



Lamellibranchiata gen. et sp. ind.., three specimens, 



Belemnoidea-ivà^xï\Qni?>. 

 As far as I have been able to discover, Ostrea eduli- 

 formis first occurs in the Humphriesianum-zone of the 

 Bajocian, extends through this stage and the Bathonian 

 and dies out in the Macrocephalus-zone of the Lower 

 Callovian. 



b) A brow'n calcareous sandstone, sometimes fine- 

 grained, at others of medium-grain or coarse-grained, 

 occurring at about 1675 feet (525 metres) above sea-level, 

 contained: — 



Waldheimia sp., one specimen. 



Ostrea edtdiformis, Schloth., a few specimens. 



Myoconcha grönlandica nov. sp., two casts. 



Trigonia undulata, Fromherz, six specimens. 



Ästarte sp. cf. elegans, Sow., a few specimens. 



Tancredia cf. angulata, Lycett, three specimens of 

 shells and casts. 



Gresslya gregaria, (Ziet.) Goldf. sp., sixteen casts. 



Gresslya abducta, Phill. sp., eight casts. 



Gresslya. peregrina, Sow. sp., a few casts. 



Pholadomya angustata. Sow. sp., one cast. 



Lamellibranchiata gen. et sp. ind., various impress- 

 ions and casts. 



Gastropoda gen. et sp. ind., one specimen. 



Ammonites sp. Ind., five fragments. 



Belemnoidea-fvagmeuis,. 



