6 (VKCILIOIDKS, ATLANTIC ISLANDS. 



dentiform callus in the middle of the parietal margin. 



Portugal, Madeira? Section Rhaphidietta, species 2, 6. 

 For convenience the species are grouped geographically, 

 under the following heads: 



Atlantic Islands, species 1 to 3. 



Central Europe, species 4 to 5. 



Spain and Portugal, species 4, 6 to 8. 



Northern Africa, species 9 to 12. 



Italy, Sicily and Malta, species 13 to 21. 



Greece, Western Asia, species 22 to 31. 



Africa and Arabia, species 32 to 36, 46. 



Tropical Asia, East and West Indies, etc., species 37 to 49. 



Section Catcilioide-s s. str. 

 Species of the Atlantic Islands. 

 1. C. SPICULUM (Benson). 



Shell imperf orate, subulate-cylindric, very slender, hyaline, 

 polished; spire lengthened, the apex obtuse; suture impressed, 

 margined. Whorls less than 6, slightly convex, the last one- 

 third the length of the shell. Aperture vertical, tapering-piri- 

 form, rounded basally; lip slightly obtuse and a little arcuate. 

 Columella deeply, obliquely truncate at base, and calloused at 

 the parietal margin. Length 4, diam. 1, aperture 1.33 mm 

 (Bens.). 



Cape Verde Is.: S. Antao (Dohrn), and S. Vicente, near the 

 Duke's Head Mountains (E. L. Layard). 



Achatina spiculum BENS., Ann. Nat. Hist, xviii, 1856, p. 

 435. PFR. , Monogr. viii, p. 289. WOLLASTON, Testacea 

 Atlantica, p. 517. Caecilianella amoenitatum DOHRN, Malak. Bl. 

 xvi, 1869, p. 10. MORELET, Journ. de Conchyl. 1873, p. 242. 



According to Wollaston, this species differs from C. acicula 

 by being smaller, narrower, thinner, paler, more highly polished 

 and more transparent; its spire, which has a volution less, is 

 shorter and a little more obtuse at the apex, its suture is less 

 oblique, its columella is relatively somewhat longer and 

 etraighter, and more flexuous, and its entire outline is both 

 narrower and more fusiform. 



