7- TEST ACE A ATLANTIC A. 



spiral broken-up lines, or scratches, which are more or less dis- 

 tinguishable in that species. 1 



The V. nitida would seem to represent in Madeira the V. 

 Lamarcki/i <'f the ( lanarian archipelago : for my own belief is that 

 the former does not occur at the Canaries at all, — its analogue 

 in that Group being the true Lamarckii of Ft'russac, which Mr. 

 Lowe unfortunately mistook for this common Madeiran species. 

 Indeed the V. Lamarcki/i proper (which is also the V. Teneriffce 

 of Quoy and Gaimard) appears in some respects to be interme- 

 diate between the V. nitida and the ruivensis, — having the 

 more numerous volutions and subcentral nucleus of the former, 

 with the larger size, less ventricose contour, more flattened 

 apex, and the more outwardly-produced (or less rounded, and 

 more enlarged, elongate) aperture of the latter; and it is per- 

 haps owing to this circumstance that Mr. Lowe fell into the 

 error of identifying it, although confessedly Canarian, under the 

 title of ' V. Teneriffce ' with the ruivensis, and under that of 

 ' V. Lamarckii ' with the nitida? 



Fam. 4. HELICID^]. 



Genus 5. HYALINA, Gray. 



(§ Lucilla, Lowe.) 



Hyalina cellaria. 



Helix cellaria, Mull, Verm. Hist. ii. 28 (1774) 

 „ ,, Lowe, Cambr. Phil. S. Trans, iv. 47 (1831) 



„ „ Id., Proc. Zool. Soc. Load. Ill (1854) 



„ „ Alb., Mai. Mad. 17. t. 2. f. 15-17 (1854) 



„ „ Morel., Hist. Nat. des Acor. 165 (1860) 



„ „ Paiva, Mon. Moll. Mad.' 21 (1867) 



Hyalina cellaria, Mouss., Faun. Mai. des Can. 17 (1872) 

 Helix cellaria, Watson, Journ. de Conch. 222 (1876). 



Habitat Maderam, necnon etiam (sec. B. de Paiva) De- 



1 The portion of the lip, in the V. nitida, which adjoins the columella is 

 sometimes membraneous (though not so conspicuously so as in the V. ruiren- 

 sis), whilst at others it is so comparatively thickened as to be in every respect 

 similar to the remainder of the shell. And I think it is not unlikely that it 

 was from specimens in the latter condition (which are often smaller and a 

 triile more globose) that Gould's diagnosis of his J", nitida (Ea-ped. Shells, 

 26 ; 1846) was principally drawn out. 



2 I may just notice in this place the Vvtrina Bocagei of Paiva (Jovrn. de 

 Conch., Oct., 1866; and Mon. Moll. Mad. 10. t. 2. f. 6. 1867), which was 

 founded on a young example of the HeUx Webhiana, Lowe, as has been 

 pointed out by the Rev. R. B. Watson. ' Vitrina Bocagei, Paiva,' says the 

 latter {Journ. de Coneh. 219 ; 1876), ' est certainement le jeune age de VHeUx 

 Wehlnana, apporte de Porto ISanto, et mele accidentellement avec les especes 

 strictement maderiennes.' 



