197 



particular horizions. Cephalopoda are rare, but Gasteropoda, 

 and ConcMfera very numerous, the shells forming seams in 

 the rock, which are often crowded to excess. In the following 

 lists I have catalogued only the most abundant forms from 

 the shelly Limestones : — 



Gasteeopoda. 



Alaria armata, Mor. & Lye. 

 " hamulus, Desl. 

 " paradoxa, Desl. 

 : trifida, Phil. 

 Cylindrites acutus, Sow. 



II altus, Mor. & Lye. 



II cuspidatus, Sow. 



Eulinia communis, Mor. & Lye. 

 Monodonta formosa, Mor. & Lye. 

 II Lyellii, d'Areh. 



II Labadyei, d'Areh. 



Natica Miclieliiii, d'Areh. 

 Nerineea Voltzii, Desl. 

 II funiculus, Desl. 



II Dufrenoyi, d'Areh. 

 Nerita rugosa, Mor. & Lye. 

 II cancellata, Mor. & Lye. 

 II hemisphsBrica, Roem. 

 II minuta, Sow. 



CeritoUa acuta, Mor. & Lye. 



II unilineata. Sow. 

 Cerithium quadricinctum. Gold/. 

 Delphinula alta, Mor. & Lye. 

 Patella Auhentonensis, d'Areh. 

 II inornata, Mor. & Lye. 

 II rugosa, Sow. 

 Phasianella elegans. Sow. 



II Leymerieri, d'Areh. 



II conica, Mor. & Lye. 



Pileolus loevis, Sow. 



II plicatus, Sow. 



Purpuroidea glabra, Mor. & Lye. 



II Morrisii, Bnvig. 



II nodulata, Sow. 



Trochotoma obtusa, Mor. & Lye. 



II conuloides, Desl. 



Trochus obsoletus, Bctm. 

 II spiratus, d'Areh. 



CONCHIPEEA. 



Area semula, Phil. 



" Prattii, Mor. and Lye. 

 " cucullata, Rocm. 

 II Hirsonensis, d'Areh. 

 Astarte excavata, Sow. 



II excentrica, Mor. and Lye. 

 II rbomboidalis, Phil, 

 II squamula, d'Areh. 

 Avicula echinata. Sow. 

 II costatula, Desl. 

 Cardium Strickland!, Mor. and Lye, 

 Corbis Madridi, d'Areh. 



II Bathonica, Mor. and Lye. 

 Corbula involuta, Gold/. 



Cypricardia cordiformis, Desh. 

 Cyprina Loweana, Mor. and Lye. 

 II nuciformis, Mor. and Lye. 

 II trapeziformis. Gold/, 

 Gervillia monotis. Deal, 

 II ovata, Sow. 

 II socialis, Mor. and Lye, 

 Hinnites velatus. Gold/. 

 Lima cardiiformis, Sow. 

 duplicata, Sow. 

 II impressa, Mor. and Lye, 

 II ovalis, Sow. 

 Limopsis ooliticus, Desl. 

 Lithodomus inclusus, Desl. 



