276 FERUSSACIA, MADEIRA. 



Madeira: between Caniyo and Sta. Cruz, on the stems of 

 Euphorbia (Wollaston). 



Lwea iridescens WOLL., Testacea Atlantica p. 262 (1878). 



' ' The present Lovea, which appears to be quite distinct from 

 every member of the group which was described by Mr. Lowe, 

 belongs to exactly the same type as the South-Desertan L. pro- 

 ducta, its rather narrow, subulate outline, oblique suture, fragile 

 consistency, and perfectly edentate, backwardly (and obliquely) 

 acuminated mouth being strongly suggestive of that species. 

 Nevertheless specifically it is quite distinct its smaller size, 

 darker hue, and conspicuously iridescent surface, in conjunction 

 with its slightly shorter and more attenuated spire, its rather 

 less flattened volutions (the penultimate one of which is not 

 elongate), its still thinner and more pellucid substance, and the 

 fact of its columella being less twisted and not so prominent at 

 the base, being more than enough to separate it immediately 

 from L. producta" (Wollaston). 



70. F. TEREBELLA (Lowe). PI. 39, figs. 21, 22. 



The shell is slender, fusiform-ovate, thin and somewhat trans- 

 parent, though decidedly thicker than F. gracilis, corneous- 

 brown with a white sutural band bordered by a gray line. 

 Whorls 6, very flat, slowly increasing to the last, which de- 

 scends more obliquely. Aperture subvertical, not calloused 

 within the outer wall, half as long as the shell, piriform. The 

 outer lip is thin but has a narrow white bordering callus; it is 

 convex in the middle in profile view, retracted above. There 

 is a moderately thick, smooth parietal callus. The short white 

 columella is somewhat thickened, and appears nearly straight 

 in front view, but viewed obliquely in the aperture a low but 

 distinct spiral fold is seen above. Length 6.1, diam. 2.3, aper- 

 ture 3 mm. 



Porto Santo: In the higher mountains, especially Pico Branco. 



Achatina terebella LOWE, Ann. Mag. N. H. (2 ser. ), ix, p. 

 120 (Feb., 1852). A. gradlis var. terebella LOWE, P. Z. S., 

 1854, p. 2CO. Lovea terebella (with var. subula) WOLLASTON, 

 Test. Atlant., p. 251. Not CochlicopaterebellumSoweYby, 1844. 

 Achatina lowei PAIVA, Journ. de Conchyl., 1866, p. 339, pi. 11, 

 f. 1; Moll. terr. et fluv. Ins. Maderensium, p. 108, pi. 2, f. 7. 



