200 REV, R. T. LOWE's LIST OF SHELLS 



sent to me by Webb in 1829 of his H. lancer ottensis, and with 

 others found by myself and Mr. Wollaston last year not only in 

 Lanzarote and Fuerteventura, but also together with H. Orhignyi, 

 Webb, in all the Canary Islands, and especially in Teneriffe, both 

 at S** Cruz and Orotava. Var. /3 differs from it only in the 

 slightly larger or more open umbilicus, which exposes a portion of 

 the preceding volution. It is more frequent than a in Mogador, 

 and differs from H. Orhignyi, Webb, in size only. 



D'Orbigny has wonderfully misunderstood this common species. 

 Not only, as ah'eady noted, has he placed in his collection and de- 

 scribed in Webb's ' Histoire ' for the true IL. lancer ottensis, Webb, 

 an old dead shell of S. monilifera, Webb, but five genuine ex- 

 amples of the true H. lancerottensis in his collection have been 

 mistaken for, and actually stand as types of, the larger variety, 

 H. Orhignyi, Webb. 



7. Helix Pmnilio (Chemn.), Pf. (ed. 1) i. 178. Trochus Pii- 

 milio, Chemn. xi. 164. 1. 196. fi". 1888, 1889. 



This most elegant little species is locally abundant in the neigh- 

 bourhood of Mogador, whence it was received by Chemnitz many 

 years ago. It seems to have escaped entirely the notice of later 

 naturalists. Its only Canarian representative is S. Despreauxii, 

 Orb., which abounds on that wonderful half sand, half marshy 

 region of El Charco, near Maspalomas, at the southern extremity 

 of Grrand Canary, on dry banks under stones. It is also closely 

 allied to the European H. elegans, Gem., Caroni, Desh., elata, 

 Eaure-Big., &c. ; but it has no Madeiran analogue. 



8. Helix lenticula, Eer., Pf. (ed. 1) i. 211 ; Eossm. vii., viii., 12, 

 f. 452. H lenticulata, D'Orb. MoU. Can. in W. B. ii. 2. 66. t. 2. 

 ff. 10-12. H. suhtilis, Lowe, Prim. 45. t. 5. f. 13. Carocolla len- 

 ticula, Phil. i. 136. — A widely diffused South European species, per- 

 vading the Madeiran and Canarian groups, and found equally in 

 Spain, Portugal, the South of Erance, Greece, Sicily, Egypt, and 

 Algeria, as at Mogador. Its range of extension further to the 

 south has yet to be explored. 



9. Helix lactea, Miill., Pf. (ed. 1) i. 272 ; Eossm. v. 7. f. 302, 

 and ix. 1. ff. 545-551 ; Webb, Syn. 9. no. 5 ; D'Orb. MoU. Can. 

 in W. B. Hist. ii. 2. p. 55. H. faux nigra, Chemn. ix. 2. p. 127. 

 t. 130. f. 1161. — The abundant occurrence of this shell living in 

 the wild half-desert region of El Charco at the remote southern 

 extremity of Grand Canary, below Maspalomas, is unfavourable to 

 D'Orbiguy's supposition of its having been of Spanish introduction 

 to that island, in which, and in Teneriffe alone of all the Canarian 



