8 OECILIOIDES, ATLANTIC ISLANDS. 



those above on account of the more rapid descent of the last two 

 turns of the suture. The suture is distinctly marginate. The 

 outer lip is strongly convex in profile view, the greatest con- 

 vexity being below the middle. Columella strongly concave, 

 not heavily calloused, narrowly, subvertically truncate at base. 

 Parietal callus hardly perceptible. Length 4.1, diam. 1.3 mm. 



Madeira: Under stones in dry places (Albers); Punta Sao 

 Lourenco. (M. Grabham). 



Glandina acicula Mull. , ALBERS, Malac. Maderensis, 1854, p. 

 59, pi. 15, f. 17, 18; renamed Caecilianella nyctelia BOURGUIGNAT, 

 Rev. et Mag. de Zool. 1856, p. 430, pi. 12, f. 21, 22 (copy from 

 Albers). Achatinan., PFR., Monogr. iv, 626. 



This species is distinguished from C. acicula by the irregular 

 increase of its whorls, the antepenultimate or penultimate sud- 

 denly widening more rapidly than those before, and by the 

 narrow, subvertical truncation of the columella, that of acicula 

 being wider and more approaching horizontal. The species of 

 Bourguignat was based solely upon Albers' account; and the 

 latter, in my opinion, applies to this form rather than to the 

 real C. acicula. Bourguignat had not actually seen the 

 Madeiran shell. 



The Sicilian C. actoniana, rizzeana and petitiana are apparently 

 identical specifically with nyctelia, or at all events, there seems 

 to be no difference in the shells. How many other of the 

 "species " are really the same I do not know. Fig. 32 repre- 

 sents an adult shell from Punta Sao Lourengo; fig. 33 a young 

 shell from another locality, length 3.6, diam. 1.1 mm. 



Var. maderensis n. v. PI. 2, figs. 34, 35. The shell is com- 

 posed of 5 nearly flat whorls, the last turn of the suture de- 

 scending more rapidly. Aperture more than half the total length, 

 lanceolate; columella slightly concave, rather lightly calloused, 

 and somewhat widely truncate at the base. Length 4, diam. 

 1.25 mm. 



Madeira: Suburbs of Funchal, 400 ft. elevation (M. Grab- 

 ham). Type in coll. A. N. S. P. 



