444 



THE GEOLOGIST. 



capable of extension or compression, would give play to the earth's 

 distance from the sun, and render intelligible former variations of 

 temperature of our planet. We have before, in this volume, thrown 

 out speculations on possible cosmical occurrences and conditions, and 

 we wish the idea now offered for discussion to be regarded as no 

 more, at present, than a speculation. 



ON THE OCCUEEENCE OE WALDHEIMIA (TEBEBBA- 

 TULA) TAMABIND US, AND THE DISTRIBUTION OF 

 BEACHIOPODA, IN THE CBETACEOUS EOCKS OE 

 IEELAND. 



By Ealph Tate, E.G.S. 



E. E. Lankester, Esq., in his paper " On some Cretaceous Brachio- 

 poda," — see November number of ' Geologist,' — states T. tamarindus 

 to be a rare shell; so also in Davidson's f British Brachiopoda,' Pal. 

 Soc. Publications, the localities for this species given in that mono- 

 graph are : — Isle of "Wight, in Lower Greensand ; near Sandgate, in 

 Kentish Eag; and Upper (?) Greensands of Earingdon. I have to 

 add another locality — Colin Glen, near Belfast. This species occurs 

 with us in true Upper Greensand, associated with Ammonites per- 

 amplus, Becten cequicostatus, Bxogyra colwnba, Vermicularia concava, 

 etc. 



I have generally found it, in masses of 2 or 3 inches in thickness, 

 among the soft chloritic sandstones, and never in a continuous band. 

 I have not met it in any other locality ; but individuals may be ob- 

 tained in abundance in the locality given. 



The distribution of this species is thus extended, ranging from 

 the Neocomian to the Upper Greensand. 



I take this opportunity of furnishing a list of the Brachiopodous 

 shells of the Cretaceous rocks of the couuty xlntrim. 



The species have nearly all been collected in the immediate neigh- 

 bourhood of Belfast. 



Brachiopoda of the Hard Chalk, White Limestone : Upper Chalk. 

 — Crania Ignabergensis, Eetz, BJiynchonella plicatilis, Sow., Tere- 

 bratula cornea, Sow., T. semiglobosa, Sow., T. obesa, Sow., T biplicata, 

 var. Dutempleana, D'Orb., TerebratuUna striata, Wahl. 



Upper Greensand. — BhynciioneUa limbata, Schlott, B. latissima, 

 Sow., B. compressa, Lam., Terebratula biplicata, Sow., T. semiglobosa 

 var. bulla, Sow., TerebratuUna striata, Wahl., Walclheimia tamarindus, 

 Sow. 



Gault. — Bliynclionella nuciformis, Sow., Terebratula squamosa, 

 Manfc. 



