MADEIRAN GROUP. 249 



Lovea Leacockiana. 



Achatina Leacociana, Lowe, Ann. Nat. Hist. ix. 119 (1852) 

 „ „ Pfeiff., Mon. Hel. iii. 511 (1853) 



5J „ Lowe, Proc. Zool. Soc. Lond. 205 



(1854) 

 Glandina Leacociana, Alb., Mai. Mad. 57 (1854) 

 Achatina Leacociana, Paiva, Mon. Moll. Mad. 105 (1867) 



Habitat Maderam ; sub lapidibus, prassertim in humidius- 

 culis inferioribus, rarissima. 



I cannot agree with Mr. Lowe that the present shell has a 

 stronger affinity with the Porto-Santan L. ovuliformis than it 

 has with his common Achatina maderensis {i.e. lubrica, Mull.) 

 of Madeira proper, though its rather small size and its ex- 

 tremely thin substance and subhyaline surface are points in 

 which it makes an evident approach to the former ; for in the 

 slight (though certainly very slight) tumidity of its volutions, 

 as well as in its general outline and its perfectly edentate 

 mouth, it is most unquestionably more in accordance with the 

 latter. There can however be no possibility of actually con- 

 founding it with the A. lubrica, — its smaller size, rather nar- 

 rower outline, and even still more transparent substance, added 

 to its somewhat less blunted apex, its more elongate and more 

 laterally-straightened aperture, its more acute (or less thickened) 

 peristome, and the fact of its columella being dilated into a 

 posteriorly-truncate process, being abundantly sufficient to dis- 

 tinguish it from that species. 



The L. Leacockiana occurs sparingly in Madeira proper, at 

 rather low and intermediate elevations, and was first detected 

 by T. S. Leacock, Esq., in the Eibeira de Joao Gomes, above 

 Funchal, and subsequently by the Eev. E. B. Watson, — near, 

 I believe, to the Levada da Senhora do Bom Successo; and 

 there are examples of it in Mr. Lowe's collection which would 

 appear to have been found in the north of the island, in the 

 vicinity of Porto Moniz. 



The Baron Paiva records a larger state of this species from 

 the Ponta de Sao Lourenco, in the extreme east of Madeira ; 

 but as I have not seen a type of the particular form to which 

 he alludes, I cannot vouch for its being strictly conspecific with 

 the L. Leacockiana. Possibly indeed it may be identical with 

 the one which I have enunciated below as the L. iridescens, 



in Madeira, the animal of the L. folliculus (including the pedal disk) is of 

 pale clear greenish-yellow, with the tentacles (and less so the neck) of a 

 slatey-grey. It is carinated behind, wrinkled with oblique lines on either 

 side, and has the subapical prominence or gland very distinguishable when 

 the creature is in certain positions, though less easy to be traced when the 

 body is much straightened out. 



