380 TEST ACE A ATLANTIC A. 



grade) are to be found. This * H. OrbignyiJ which is some- 

 times rather abundant about Sta. Cruz, Orotava, and Garachico, 

 occasionally attains an appreciably larger size (when it corre- 

 sponds with the <var. mitigcutaj Mouss.), and is apt to live 

 gregariously beneath stones, where it encrusts itself with a more 

 or less hardened covering of the dusty soil, much after the 

 fashion of the Madeiran H. vulgata, Lowe, with which species 

 indeed I cannot but think that it has, despite its comparatively 

 diminutive bulk, something very decidedly in common. 



My Palman specimens are principally from the Barranco de 

 Herradura. 



( Irus, Lowe.) 



Helix eutropis. 



Helix eutropis, ShuttL, MaL Blatt. vii. 237 (1860) 

 Pfeiff., Mon. Hel. v. 371 (1868) 

 Mouss., Faun. Mai. des Can. 58. pi. 3. 

 f. 28-30 (1872) 



Habitat Fuerteventuram, rarissima ; a Dom. Berthelot olim 

 communicata, necnon a cl. Fritsch nuper collecta. 



This is one of the rarest, and most peculiar, of the Canarian 

 Land-shells, and one which entirely escaped the observations of 

 myself and Mr. Lowe in the archipelago. It appears to have 

 been observed hitherto only in Fuerteventura, from whence I 

 possess a single example from the collection of M. Berthelot ; 

 and others seem to have been found, more recently, in the same 

 island, by Fritsch. 



The H. eutropis (which is rather thin in substance, and 

 which measures about seven lines across its broadest part) is an 

 umbilicated and slightly lenticular species, somewhat convex be- 

 neath, and with a strong crenulated subfiliform keel ; its surface 

 is coarsely ribbed, both above and below, with oblique, regular, 

 remote, and much elevated costse, and its colour is of a dull 

 griseous-green. Although considerably smaller, it a little calls 

 to mind, at first sight, both in its outline and sculpture, the 

 Porto-Santan H. Wollastoni and forensis, of the Madeiran 

 Group ; but its conspicuously open umbilicus will, even of itself, 

 at once remove it from the scabriuscula type. 



Helix multigranosa. 



Helix multigranosa, Mouss., Faun. Mai. des Can. 59. pi. 3. 



f. 25-27 (1872) 

 Pfeiff., Mon. Hel. vii. 292 (1876) 



Habitat Gomerarn ; semifossilis ; a cl. Fritsch, in Valle de 

 Gran-Rey, reperta. 



