49 



The proportion which these bear to the Canary species is — 



Acephala lamellibraneliiata 73 in 84, or 76 per cent. 



Acepliala palliobraneHata 4 „ 4, ,,100 ,, 



Pteropoda 7 „ 16, „ 44 



Gasteropoda prosobranchiata 97 ,,184, ,, 53 ,, 



Gasteropoda opisthobranchiata .. 8 ,, I'i, ,, 07 ,, 



Cephalopoda 2 „ •■>, „ 100 



Total 190 in 309, or 63 per cent. 



The Canary species which have not been found in the south of 

 Europe or Mediterranean are generally of more southern type, and such 

 of them as are not already known inhabitants of Western Tropical Africa, 

 wiU probably prove to be so. Of these, the species of Pedij^es is found 

 in Fayal, Littorina Striata and Mitra fusca in Madeira and the Azores, 

 Modiola (unnamed), Pectcn corallinoides, Patella crenata, P. guttata, P. 

 Lowei, P. Candei, Monodonta Bertheloti, a Solarium, Scalaria cochlea, 

 Eulima? (new), Natica i^orccUana, and another Natica, a new Cancellaria 

 Mitra zehrina, and another Milra, Cyjirma candidula ? Marginella 

 guancha, and an undescribed Cylichna extend to Madeira. Neritina 

 viridis, and Columbella cribraria are common to the Canary, Madeira, 

 and "West India Islands. 



The marine fauna of the Canary Islands is characterized by the pre- 

 sence of numerous species of Scalaria, and by the absence of all repre- 

 sentatives of the genera Nuciila, Leda, and Anomia. 



Madeira. 



During a few days spent in the Madeira Islands I obtained 15 fi 

 species of marine testaceous Mollusca. 



Acephala lamellibranchiata. 



