CANARIAN GROUP. 389 



long a,rray of examples collected in various localities, I cannot 

 persuade myself that the H. Bertheloti of Ferussac is anything 

 more than a slightly enlarged and robuster phasis of the ordi- 

 nary H. hispidula, in which the costate lines are a little coarser, 

 the umbilicus just appreciably wider, and the entire surface 

 more distinctly studded with a few remote (more or less hair- 

 bearing) granules. Every other character which is mentioned 

 in the published diagnoses seems to me to be simply imaginary ; 

 and moreover, unless I am greatly mistaken, the two forms 

 merge gradually into each other. At any rate the habitats 

 abovv3 referred to are for the smaller (or ' typical ') state. The 

 larger one, or <var. ft. Bertheloti^ was taken commonly by 

 Mr. Lowe and myself above the Puerto of Orotava ; and it is 

 said to have been found by Fritsch at Taganana and (rui mar. 1 



The H. hispidula is a rather discoidal shell, with the keel 

 not very sharply expressed, and the umbilicus small but open 

 and cylindrical. It is thin and fragile in substance, of a pale 

 horny-brown, closely sculptured with fine transverse costate 

 lines, and more or less clothed (when the specimens are fresh 

 and unrubbed, and particularly when young) with short squami- 

 form hairs. Its peristome is acute, but a little recurved, and 

 with the upper and lower margins wide apart and unconnected 

 by an intervening lamina. Although on the whole depressed, 

 the H. hispidula is less so than any of the following members 

 of the present section. 



Helix fortunata. 



Helix lens, W. et B. [nee Per., 1821], Ann. des Sc. Nat. 28. 



syn. 315 (1823) 



tfOrb., in W. et B. Hist. 66. t. 2. f. 7-9 (1839) 

 fortunata, ShutiL, Bern. Mitth. 141 (1853) 

 Pfei/., Mon. Hd. iii. 162 (1852) 



Mouss., Faun. Mai. des Can. 64 (1872) 



Habitat Teneritfam, et (sec. Fritsch sed an vere ?) Grome- 

 ram ; supra Sanctam Crucera ( in ilia) prsecipue occurrens. 

 Usque ad 2,000' s.m. ascendit. 



Like the H. hispidula, this is more particularly Teneriffan, 

 though (as in the case of that species) it would appear to have 

 been found by Fritsch in Gomera also. Near Sta. Cruz in 

 Teneriffe it was met with by Mr. Lowe and myself in tolerable 

 abundance, where it seems to ascend to a somewhat higher 



1 If so slight a modification as the If. Bertlwlati, which is often barely 

 distinguishable from the smaller type, is necessarily to be treated as specific, 

 I can only say that the Madeiran H. polynwrplia should, by parity of rea.son- 

 ing, be split up into at least twenty ' species ' (so called). 



