20 TEST ACE A ATLANTICA. 



(§ Comdus, Fitz.) 



Hyalina fulva. 



Helix fulva, Mull, Verm. Hist. ii. 5Q (1774) 



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

 Couulus fulvus, Fitzinger, Syst. Verz. 94 (1837) 

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



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

 Zonites fulvus, Drouet, Faun. Agor. 150 (1861) 



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

 lapidibus. 



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

 Miill., is found on every island of tbe Azorean Grroup ; and 

 tbis is all tbe more remarkable, inasmucb as it has not 

 hitberto been observed in any of tbe more southern archi- 

 pelagos. Considering too its inconspicuousness, one can only 

 conclude, from tbe 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 tbis is the case. 



(§ HeUcella, Beck.) 



Hyalina atlantica. 



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



(1857) 

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



(1858) 

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



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



(1860) 

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



Habitat ins. omnes (teste Godman 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 Godman and Drouet, tbis Hyalina. occurs on 

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

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

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

 plupart des iles de rarchipel.' 



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 



