460 TEST ACE A ATLANTIC A. 



Lovea lanzarotensis. 



Cionella Lanzarotensis, Mouss., Faun. Mai. des Can. 133. 



pi. 6. f. 28, 29 (1872) 



Ferussacia Lanzarotensis, Pfeiff., Man. Hel. viii. 305 



(1877) 



Habitat Lanzarotam ; sub lapidibus, in saxosis elevatis, bine 

 inde congregans. 



Judging from a long array of examples wbicb are now before 

 me, tbis beautiful and ratber large Lovea (wbich measures 

 from about 4^- to 5 lines in lengtb) is eminently variable not 

 only in hue and solidity, but also in exact outline and the relative 

 size of its volutions ; nevertheless it may be denned, on the 

 whole, as a cylindrical species, not much tapering towards the 

 apex, with the suture exceedingly oblique, the peristome thick 

 and incrassated, and with the penultimate whorl more or less 

 largely developed. 



The L. lanzarotensis, as here understood, was taken abun- 

 dantly by Mr. Lowe and myself in Lanzarote, namely, on the 

 low craggy mountains (or ridges) above Haria, as well as on the 

 lofty sea-cliff known as the ' Risco ' (and overlooking the 

 Salinas) in the extreme north of the island ; and the specimens 

 from the former of those localities (which, I think, as being 

 more removed from the L. attenuata, should be regarded as the 

 typical ones) are more solid, more highly polished, and of a 

 paler ochreous-yellow, than those from the latter ; and they are 

 also, on the average, a trifle narrower and more cvlindric, with 

 their penultimate volution a little more tumid, and with their 

 aperture (which is just appreciably shorter) rather more obtusely 

 rounded (or less angular) at the point of junction with the 

 columella. In fact the precise difference between the two forms, 

 now under consideration, might be briefly enunciated thus : 



a. [normalis~\. Solida, angustula, subcylindrica, clare 

 ochrea, politissima ; anfractu penultimo elongato, subinflato- 

 cylindrico; apertura breviuscula, postice obtuse rotundata. 

 (Habitat in montibus prseruptis mox supra oppidulum Haria.) 



/3. tumidula. Subminus solida, paululum minus angusta, 

 cylindrico-fusiformis, obscure cornea, vix minus nitida ; anfractu 

 penultimo plerumque minus conspicue elongato, subinflato- 

 conico; apertura sublongiore, postice paululum minus obtuse 

 rotundata aut magis angulata. (Habitat ad rupes maritimas in 

 boreali insulse, supra Salinas.) 



In point of fact the ' var. J3. tumidula ' is somewhat inter- 

 mediate (in outline, substance, and hue) between the normal 

 state (or 'a.') and the L. attenuata of Mousson ; so that I 

 should not be at all surprised if the attenuata should prove in 



