DR. PHILIPn S COMPARATIVE TABLES OF MOLLUSCA. 



101 



List of British Genera not represented in South Italy. 



Xylophaga 



Sanguinolaria 



Lepton 



Velutina 



Lacuna 



Montagua 



Mya 



Cyprina 



Goodallia 



Skenea 



Polycera 



Sphenea 



Ervilia 



Discina 



Cyclostrema 



Tergipes 



If we now look to the Habitus or the Physiognomy of the 

 fauna, if I may so express myself, with reference to the species 

 common to both, we find the difference between the two faunae to 

 be much more considerable than when we only judge from the 

 mere number of the identical species. We see, for instance, that 

 the commonest and most abundant of the British species are either 

 entirely absent or extremely rare in South Italy, and the converse. 

 As an instance, I may quote the following species belonging to the 

 former class : — ■ 



Patella vulgata 

 pellucida 

 virginea 

 Turbo littoreus 

 rudis 

 obtusatus 

 Trochus cinerarius 

 Purpura lapillus 

 Buccinuin undatum 



Of Marine Mollusca. 



Buccinum glaciale Mactra (several) 



Fusus antiquus Tellina punicea 



despectus bimaculata 



turricula crassa 



(Harpula Mencke) Astarte (several) 

 Pleurotoma (several spe- Cyprina islandica 



cies) Pholas crispata 



Pec ten maximus Mya arenaria 



obsoletus &c. &c. 



Of Land and Fresh-ivater Species. 



Limax agrestis 

 Helix pomatia 



arbustorum 



hortensis 



nemoralis 



Clausilia rugosa 



plicatula 

 Lymnams auricularius 

 Physa hypnorum 

 Planorbis corncus 



Planorbis con tortus 



vortex 

 Paludina vivipara 

 Unio batavus 



On the other hand, the following common South Italian species 

 are either quite absent or very rare in Great Britain : — 



Tellina pulchella 



depressa 



nitida 

 Lucina pecten 

 Donax trunculus 



venusta 

 Venus geographica 

 Cardium erinaceum 

 sulcatum 

 papillosum 

 Cardita (all the species) 

 Chama gryphoides 



Of Marine Species. 



Lima inflata 



squamosa 

 Pecten jacobaeus 



polymorphus 



hyalinus 

 Spondylus grederopus 

 Chiton siculus 

 Patella (almost every sp.) 

 Bulla striata 

 Nerita viridis 

 Natica olla 



millepunctata 

 h 3 



Trochus fragarioides 

 divaricatus 

 fanulum 

 canaliculatus 

 Ilichardi 

 umbilicaris 

 Adansoni, &c 

 Monodonta Vieilloti 

 Jussieui 

 Phasianella speciosa 

 Turbo neritoides L. 



(caerulescens Lamk.) 



