93 



Referring to the list already given of species common to Scandinavia 

 and the North of Spain, and deducting from it those species which are 

 included upon the strength of their having heen found further South, 

 the proportion of North Spanish species common to Scandinavia will 

 be found to be — 



Aeepliala liiinelljbrnnolnata -4!) io 88. or 50 p;n- i-ent. 



Acephala palliobranchiata 1 „ 1. ,, 100 



Gasteropoda prosobrancliiata ... 48 „ 11'!. ,, 43 



Gasteropoda oijisthoLraucliiata... 8 ,, 10, ,, 80 



Total 106 in 212, or 50 per cent. 



On comparing the North of Spain list with species recorded from the 

 South of Spain and Mediterranean, there appears to be absent from 

 the latter district — 



ACEPHAJA LAMEIXI- 

 Bfi.iNCHIATA. 



KeUia ? genus doubtful 

 Donax anatinus ? 

 Mactra solida 

 Tapes pullastra 

 Pecten tij'riiius ? 



Gasteeopoda peoso 

 branchiata. 

 f'liiton rufus 



cinereus 



Chiton aselhis 



eaucellatus 

 Dentalium, new spec. 

 Trofhus tumidns 



cinerariiis? 

 Littovina rudis 



Uttoreiis 

 ,, saxatHis 



,. tenebrosa 

 Rissoa iilv.T? 

 ,, striata 

 ., vitrea 



Jefifreysia opalina ".' 

 Lacuna puteoliis 

 Natica nionilifera 

 Velutina loevigata 

 Murex — 

 Purpura lapiUus 

 Fusus contrarius 



Gasteeopoda opistho- 

 beanchiata. 

 Aplysia Patersoni 



Leaving of Gallician and Asturian species known to inhabit South of 

 Cape St. Vincent — 



Ace2jhala laraeUibranchiata 85 in 88, or 04 ^ler cent. 



Acejihida paUiobrantdiiata — ., 1, „ — 



Gasteropoda prosobranchiata 01 ,, 115, ,, 80 



Gasteropoda opisthobranehiata .. ,. 10, ,, 00 



Total 183 in 212, or 80 per cent. -' 



The following species of the North of Spain have been obtained in 

 the Cauarj' Islands : — 



Thracia phascolina 



Psammobia vesppitina 



Acephala lamelu 

 meanchiata. 

 Gastrochoja cuneifor- 



mis ? 

 Saxicava arctica 

 Venenipis irus 

 Corliula nucleus 

 NeoTa cnspidatn 

 Pandora I'ostratH ? 

 „■ obtusa 



Tellina distorta 

 „ serrnta 

 Donax anatituis 

 Mactra subtruncata 

 Lutraria rugosa 

 Venus veiTUPO.sa 

 Circ(! minima 

 Astnrlo triangularis 



Cardiuni edule 



,, ecliiuatuin 

 ,. rustii^um 

 ,, pa))Ulosum 

 ,, norvcgicum 



liiuina Icuconia 

 „ tloxuosa 

 ,, spinifera 

 pecten 



Kollia suborbicularis 



