78 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. 

 Lamarckii of the Canarian 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 Ferussac, which Mr. 

 Lowe unfortunately mistook for this common Madeiran species. 

 Indeed the V. Lamarckii 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 

 c V. Lamarckii ' with the nitida.* 



Fam. 4. HELICID^l. 

 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. Land. 177 (1854) 



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



Morel., Hist. Nat. des A^or. 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. ruiven- 

 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 

 trifle more globose) that Gould's diagnosis of his V. nitida (Exped. Shells, 

 26 ; 1846) was principally drawn out. 



2 I may just notice in this place the Vitrina Bocagei of Paiva (Journ. de 

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

 founded on a young example of the Helix Webbiana, Lowe, as has been 

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

 latter (Journ. de Couch. 219 ; 1876), ' est certainement le jeune age de V Helix 

 WebMana, apporte de Porto Santo, et mule accidentellement avec les especes 

 strictement maderiennes.' 



