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. AVe 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 OCCUEEEjSrCE OP WALDSEUIIA (TEREBUA- 
TULA) TAMAEINDUS, AND THE DISTRIBUTION OF 
BRACHIOPODA, IN THE CEETACEOUS KOCKS OE 
lEELAND. 
By Ealph Tate, E.G.S. 
E. E. Lankester, Esq., in his paper " On some Cretaceous Brachio- 
poda," — see November number of ' Greologist,' — states T. tamarindus 
to be a rare shell ; so also in Davidson's ' 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, Pecten ceq^uicostatus, Exogyra colmnba, 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 county x\ntrim. 
The species have nearly all been collected in the immediate neigh- 
bourhood of Belfast. 
Brachiopoda of the Hard Chalk, White Limestone : Upper Chalk. 
— Crania Ignahergensis, Eetz, Bliynchonella plicatilis. Sow., Tere- 
hratula carnea, Sow., T. semiglohosa, Sow., T. ohesa, Sow., T. hiplicataf 
var. Dutempleana, D'Orb., Terehratulina striata, AVahl. 
Upper Greensand. — Rliynchondla limhata, Schlott, R. latissima, 
Sow., JR. compressa, Lam., Terelratula hiplicata, Sow., T. semiglohosa 
var. bulla, Sow., Terehratulina striata, AYahl., Waldheimia tamarindus. 
Sow. 
Gault. — BhyncJionella nucifor?nis, Sow., Terehratula squamosa, 
Mant. 
