1876-1877.] 



6 



259 



Dark green argillaceous sands and marls, almost en- 

 tirely made up of grains of glauconite, in an argillo- 

 calcareous paste. Nodules of phosphate of lime 

 occur in small quantity, chiefly in the medial portion 

 of the bed, where the fossils occur in the phosphatic 

 matter. Fossils are numerous, but mostly in a bad 

 state of preservation, and often as casts only 



Ammonttes varians 



„ inflatus 



ostrea (exogyra) conica 



,, PLICATA 



,, HALIOTOIDEA 



,, LACINIATA 



PECTEN GLAUCONEUS 



„ ASPER 



„ DUTEMPLEI 



„ VIRGATUS 



„ QUINQUECOSTATUS 



Trigonia, several species 

 cucull.ea carinata 

 Plicatula Bronni 



Belemnites ultimus 

 llttorina rotundata 

 Solarium ornatum 

 Myacites mandibula 

 avicula sublineata 

 Terebratula squamosa 

 Rhynchonella nuciformis 



DlTRUPA DEFORMIS 



Serpula antiqua 



,, quinquecarinata 

 Otodus appendiculatus 

 Lamna acuminata 

 Plant remains (obscure) 



Beds No. i.a., i.b., and i.e. represent, without doubt, the zone 

 of Belemnitelles. Beds Nos. 2 and 3 are usually grouped as part 

 of the latter, but it is evident from a proper comparison and exa- 

 mination of the fossils found in them that they belong to an older 

 portion of the Chalk series ; in fact, their true position is in the 

 Lower Chalk division of English writers. No doubt, their thick- 

 ness is comparatively trifling, but it is as great relatively to the 

 English Lower Chalk as the upper bed is to the corresponding 

 division in England. It will thus be seen that these beds are of 

 importance, as they are the only representatives of the Lower Chalk 

 we possess, and their persistence is very marked over a wide area, 

 extending as far as Ballintoy, in the north of County Antrim. 



