AZOREAN GROUP. 49 



found, and some of them having their plait conspicuously 

 developed ; so that it is not possible to regard the Azorean 

 specimens as representing more than, at the utmost, a slight 

 geographical variety of the usual type. 



Genus 13. ACHATINA, Lamarck. 



(§ Coohlioopa, Fer.) 



Achatina lubrica. 



Helix lubrica, Mull., Verm. Hist. ii. 104 (1774) 

 „ subcylindrica, Chemn., Syst. Conch, ix. 2. 167. t. 



135. f. 1235 (1786) 

 Achatina lubrica, Pfeiff., Mon. Eel. ii. 272 (1848) 

 Glandina azorica, Alb., Mai. Bldtt. 125 (1852) 

 Achatina azorica, Pfeiff., Mon. Hel. iii. 54 (1853) 

 Zua azorica, Mouss., Viert der Nat. Zurich, 167 (1858) 

 Glandina lubrica, Morel., Hist. Nat des Acor. 197 (1860) 



„ subcylindrica, Drouet, Faun. Acor. 164 (1861) 

 Achatina lubrica, Watson, Journ. de Conch. 223 (1876) 



Habitat ins. omnes (sec. Drouet), sed Sta. Maria, S. Miguel, 

 et Fayal sec. Morelet ; sub lapidibus, et cast., vulgaris. 



According to Morelet and Drouet the Azorean examples of 

 this common European Achatina differ in no respect from the 

 usual ones, and it is therefore utterly inexplicable how Albers 

 could have described them (as he did in 1852) as the exponents 

 of a new species. It occurs also in the cultivated districts of 

 the Madeiran and (judging from Morelet's list) the Cape-Verde 

 Groups, where there can be little doubt that it must have 

 become accidentally naturalized ; but since the Madeiran 

 specimens belong for the most part to the slightly smaller and 

 slenderer phasis of the shell which Mr. Lowe enunciated as the 

 A. maderensis (and which is the one equally alluded to in 

 Dr. Albers' ' Malacographia '), I have not cited the works of 

 either Lowe or Albers amongst the references (as above given) 

 of the species. Nevertheless I might have done so without any 

 real inaccuracy, for there can be little doubt that the rather 

 narrower and depauperated form which was characterised by 

 Mr. Lowe, and which is the almost universal aspect assumed in 

 Madeira, is conspecific with the somewhat larger type. 



Morelet speaks of the C. lubrica as abundant in Sta. 

 Maria, S. Miguel, and Fayal ; but Drouet, as is his wont in so 

 many other similar instances, adds ' Habite tout 1'archipel ' ; 

 though whether that means that he absolutely met with it (or 

 had ascertained positively that it exists) in the whole nine 

 islands, as the expression would inevitably imply, or whether, 



E 



