48 



Murex erinaceus 

 Nassa incrassata 

 Mangelia teres 

 ,, nebula 

 „ striolata 



Being — 



Mangelia linearis 



„ gracilis 



Lachesis minima 



Gastehopoda opistho- 



branchiata. 

 CyUchna C3iindracea 

 Amphispira hyalina 

 PhUine aperta 



Acephala lamellibrancliiata 33 in 44, or 01 per cent. 



Acephala paUiobrancMata — „ 1, ,, — 



Pteropoda 1 „ 5, „ 20 ,. 



Gasteropoda prosobrancMata ... 33 „ DO, ,, 37 ,, 

 Gasteropoda opisthobrancMata . . 3 ,, 6, ,, 50 ,, 



Total of Madeira species commou to the British seas, 69 in 156, or 

 44 per cent. 



All the species common to Madeira and Britain are likewise to be 

 found in the Mediterranean and Lusitauian district, with addition of 

 the following : — 



Acephala lamelli- 

 branchiata. 

 Gastrochoena cunei- 



formis 

 Tellina distorta 



EiTilia 



Cytbeiia 



Cardium ijapillosum 

 Cardita calyculata 

 Lucina pecten 

 Diplodonta apicalis 

 Pectunculus Siculus 

 Pinna squamosa 

 Lima squamosa 

 Pecten polymoi-plius 

 „ pes felis 

 „ gibbus 



Acephala pallio- 

 branchiata. 

 Ai-gyope decoUata 



Pteropoda. 

 Hyaloea tridentata 

 ,, vagineUa 



Gasteropoda proso- 

 beanchiata. 

 Patella Gussonii 

 Dentalium dentalis 

 Trochus crenulatus 



,, conulus 

 Turbo rugosus 

 Eissoa purpurea 

 Ceritbium angustinum 

 Mesalia striata 

 Neritina \iridis 



CanceUaria, undescribed 

 Murex Edwardsii 



,, cristatus 

 Cassis sulcosa 

 Buccinum minus 

 Nassa prismatica 



,, variabilis 

 Mangelia Vauquelina 



„ secalina 



„ variegata 

 Cyprcea pulex 

 Columbella rustica 

 MargineUa mUiacea 

 Kinguicula auriculata 



Gasteropoda opistho- 



beanchiata. 

 Cylichna 



Making of Madeira species common to the Mediterranean and Peninsula ; 



Acepbala lamellibrancbiata 47 in 54, or 87 percent. 



Aceiihala palliobranchiata 1 ,, 1, ,, 100 ,, 



Pteropoda 3 „ 5, „ 60 „ 



Gasteropoda prosobrancMata 55 ,, 90, ,, 61 ,, 



Gasteropoda opisthobranchiata 4 ,, 6, ,, 67 ,, 



Total 110 in 156, or 70 per cent. 



All the Madeira species were obtained in the Canary Islands, except 

 the following : — 



