CAPE-VERDE GROUP. 507 



ete recueillis avec la precedente [the H. Bouvieri] dans File de 

 San Vicente. UHelix armillata existe done aux iles de Cap- 

 Vert, comme aux Maderes et aux Azores ; il est difficile de croire 

 qu'elle manque aux Canaries, bien que M. Mousson n'en fasse 

 aucune mention dans son ouvrage.' 



(§ Caracollina, Beck.) 



Helix lenticula. 



Helix lenticula, Fer., Tall. Syst. 37, 154 (1821) 



„ subtilis, Lowe, Camhr. Phil. 8. Trans, iv. 45. t. 5. 



f. 13 (1831) 

 „ lenticula, Id., Proo. Zool. Soc. Lond. 196 (1854) 

 „ „ Alb., Mai. Mad. 43. t. 11. f. 9-12 (1854) 



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



„ „ Dohrn, Mai. Bldtt. xvi. 3 (1869) 



„ „ Mouss., Faun. Mai. des Can. 66 (1872) 



„ „ Morel., Journ. de Conch, xiii. 242 (1873) 



Habitat S. Nicolao ; a cl. H. Dohrn deprehensa ; forsan ex 

 alienis introducta. 



The widely-spread H. lenticula, of Mediterranean latitudes, 

 which occurs also in the Azorean, Madeiran, and Canarian 

 Groups, was met with by Dohrn in S. Nicolao ; but it was not 

 observed by either Mr. Lowe or myself in any of the Cape Verde 

 islands. It is far from unlikely, as Dohrn has well observed, 

 that it may owe its presence in this more southern archipelag-o 

 to mere accidental introduction from Portugal, — its usual mode 

 of life, within the cultivated districts, rendering it eminently 

 liable to chance dissemination through indirect human agencies. 



Genus 5. BULIMTJS, Scopoli. 



(§ Coeldicella, Risso.) 



Bulimus ventricosus. 



Bulimus ventricosus, Drap., Tabl. des Mull. 68 (1801) 

 Helix ventrosa, Fer., Prodr. 377. t. 52 (1807) 

 Bulimus ventrosus, Lowe, Cambr. Phil. S. Trans, iv. 62. 

 (183r 

 „ „ Morel., Hist. Nat. des Agor. 196 {I860) 



Helix ventricosa, Mouss., Faun. Mai. des Can. 46 (1872) 

 Bulimus ventricosus. Morel., Journ. de Conch, xiii. 242 



(1873) 

 „ ventrosus, Watson, Journ. de Conch. 222 



(1876) 



