20 TEST ACE A ATLANTIC A. 



(§ Cowuhu, Fit/..) 

 Hyalina fulva. 



Helix fulva, Midi., Verm. Hist. ii. 56 (1774) 



„ „ Drop., Hist. Nat. 81. t, 7. f. 12. 13 (1805) 



Conulus fulvus, Fitzinr/er, Syst. Verz. 94 (1837) 



Helix fulva, Pfeiff., Mon. ltd. i. 30 (1848) 



„ „ Morel., Hist. Nat. des Acor. 169 (1860) 



Zouites fulvus, Drouet, Faun. Acor. 150 (1861) 



Habitat ins. omnes (sec. Morelet et Drouet); hinc inde sub 

 lapidibus. 



According to Morelet and Drouet, the European H. fulva, 

 Mull., is found on every island of the Azorean Group ; and 

 this is all the more remarkable, inasmuch as it has not 

 hitherto been observed in any of the more southern archi- 

 pelagos. Considering too its inconspicuousness, one can only 

 conclude, from the fact of its having been detected by those 

 anomalously successful naturalists on nine different islands 

 which are so widely separated from each other, that it must be 

 extremely abundant ; yet, curiously enough, they do not give us 

 to understand that this is the case. 



(§ Helicella, Beck.) 



Hyalina atlantica. 



Helix atlantica, Morel, et Dr., Journ. de Conch, vi. 149 



(1857) 

 Zonites atlanticus, Mouss., Viert. der Nat. Zurich, 164 



(1858) 

 Helix atlanticus, Pfeiff., Mon. Hel. iv. 344 (1859) 



„ „ Morel., Hist. Nat. des Acor. 167. t. 3. f. 2 



(1860) 

 Zonites atlanticus, Drouet, Faun. Acor. 149 (1861) 



Habitat ins. omnes (teste Grodman et Drouet); in Sta. 

 Maria necnon semifossilis occurrit. Sec. Morelet in Sta. 

 Maria, S. Miguel et Fayal invenitur. In Flores, sec. Drouet, 

 ' au milieu des bois de genevriers ' copiose vivit. 



According to Godrnau and Drouet, this Hyalina occurs on 

 every island of the Azorean Group ; but it is only for Sta. 

 Maria, S. Miguel, and Fayal that Morelet actually refers to it, 

 — though he speaks of it, indefinitely, as ' repandue dans la 

 plupart des iles de l'archipel.' 



Drouet, however, mentions expressly that in Flores ' cette 

 zonite vit en abondance sous les pierres et dans les mousses, au 

 milieu des bois de genevriers.' 



The complete freedom from an umbilicus is the main point 

 which will at once distinguish the present Hyalina ; and in 



