388 TEST ACE A ATLANTIC A. 



hispidula and of the fortunata. Although very much smaller, 

 yet in its flattened spire, strongly developed keel, and coarsely 

 striated surface, it agrees better with the latter of those species 

 than it does with the former ; nevertheless the exceedingly long 

 and coarse hairs with which it is everywhere clothed entirely 

 remove it from the H. fortunata, as indeed they do (though 

 in a less degree) from the hispidula. It is thin ai$ fragile in 

 substance, and (although opake) somewhat transparent ; and its 

 umbilicus is deeply and rather suddenly (but by no means angu- 

 larly) scooped-out. 



From the H. lanosa, Mouss., which was described from a 

 single individual the precise island of which was uncertain, it 

 appears to recede (judging from the diagnosis) in being smaller 

 and more depressed, as well as more sharply keeled, and in its 

 umbilicus being very much larger and exposed, and in its hairs 

 (which clothe the under portion of the shell as well as the upper) 

 being considerably longer and more developed. 



Helix hispidula. 



Carocolla hispidula, Lam., Hist. vi. 99 (1822) 

 Helix hispidula, W. et B., Ann. des Sc. Nat. 28. 314 (1833) 

 Pfeiff., Mon. Eel. i. 209 (1848) 



' Mouss.) Faun. Mai. des Can. 62 (1872) 

 Pfeiff., Mon. Hel. vii. 294 (1876) 



var. /3 (major). Bertheloti, Fer. 



Helix Bertheloti, Fer., Bull. Zool. 90 (1835) 

 d'Orb., in W. et B. Hist. 65 t. 2. f. 46 



(1839) 



hispidula (pars), Pfeiff., Mon. Hel. i. 209 (1848) 

 Bertheloti, Mouss., Faun. Mai. des Can. 63 (1872) 

 Pfeiff., Mon. Hel. vii. 295 (1876) 



Habitat Teneriffam, et (sec. Fritsch, sed an vere?) Gome- 

 rani ; prsecipue in inferioribus intermediisque vulgaris. 



The H. hispidula, Lam., according to my own experience, 

 is essentially Teneriffan ; though, according to Mousson, it 

 appears to have been obtained by Fritsch in Gomera likewise. 1 

 But around Sta. Cruz and Orotava, in Teneriffe, I have met 

 with it in profusion ; and it was taken in equal abundance by 

 Mr. Lowe about Garachico, and in the Barranco de Majuelo of 

 Los Silos. It appears however to present a larger and a smaller 

 state (the latter of which is generally assumed to correspond 

 with Lamarck's type), for after a most careful comparison of a 



1 I cannot but feel it possible that the species which I have described 

 below as the H. gomerce may have been mistaken by Fritsch for the //. 

 hispidula. 



