302 TEST ACE A AT LAN TIC A. 



Shuttleworth's H. persimilis. (11) Bulimus roccellicola, W. 

 et B. ; certainly not distinct specifically from the B. variatus, 

 W. et B. (12) Cionella Webbi, d'Orb. ; identical, unquestion- 

 ably, with the Bulimus mysotis, W. et B. (13) Cyclostoma 

 adjunctum, Mouss. ; not separable specifically from the C. 

 canariense, d'Orb., of which it constitutes one of the many 

 insular races. And (14) Physa ventricosa, Mouss. ; a mere 

 phasis, I think, of the P. acuta, Drap. 



The species which I have myself added to the Canarian 

 catalogue, but which are not included in Mousson's work 

 (though two of them, the Helix planaria and Bulimus pal- 

 mensis, are treated by him as ' vars.'), are the following twenty- 

 one: (1) Hyalina osoriensis, Woll. ; a strongly defined 

 member, from a high elevation in Grand Canary, of Mousson's 

 section ' Lyra,' yet certainly not belonging to the genus Patula 

 (as the closely allied circumsessa, Shuttl., was erroneously sup- 

 posed to be by him), but to Hyalina. (2) Patula garachi- 

 coensis, Woll. ; discovered by Mr. Lowe near Garachico in the 

 north of Teneriffe, and quite distinct from everything else which 

 has been acknowledged as Canarian. (3) Helix gibboso-basalis, 

 Woll. ; allied to the H. lactea, Mull., but, I believe, truly dis- 

 tinct: from the collection of M. Vargas, and found in the north 

 of Teneriffe. (4, 5) Helix vermiplicata, Woll., and H. grano- 

 malleata, Woll. ; two rather large Helices, of the Hemicycla 

 section, detected in Palma. (6) Helix nivarice, Woll. ; a 

 species, both recent and subfossilized, of the H. malleata type, 

 occurring in the north of Teneriffe. (7) Helix apicina, Lam. ; 

 two examples of which were lately met with in Teneriffe, 

 during the expedition of H.M.S. ' Challenger.' (8) Helix cris- 

 polanata, Woll. ; a remarkably pilose species, of the Gonostoma 

 section, from Palma. (9) Helix beata, Woll.; likewise of the 

 Gonostoma group, and from Fuerteventura, but nearly related to 

 the Teneriffan H. fortunata, Shuttl. (10) Helix planaria, 

 Lam. ; treated by Mousson and others as a Teneriffan state of 

 the H. afficta, Fer., of Palma, but which I believe to possess a 

 greater claim for specific separation than most of its immediate 

 allies. (11) Helix Gomerce, Woll,; detected both in a sub- 

 fossil and semi-recent condition in Gomera, and a good deal 

 akin to (though perfectly distinct from) the H. discobolus, 

 Shuttl., of that same island. (12) Helix Watsoniana, Woll. ; 

 a rather obscure little species, from Grand Canary and Tene- 

 riffe, of the Lemniscia group. (13-18) Six Bulimi, the B. 

 palmensis, osoriensis, chrysaloides, interpunctatus, Lowei, 

 and savinosa, of which the first is from Palma, the second, 

 third, and fourth are from Grand Canary, the fifth is from Tene- 

 riffe, and the last is from Gomera and Hierro. (19) Lovea 



