80 TEST ACE A ATLANTIC A. 



Habitat Maderam; sub lapidibus detecta, supra urbem 

 Funchalensem. Rarissima. 



This extremely minute Hyalina is even smaller than the 

 H. crystallina, the largest examples being scarcely a line in 

 diameter ; and it may at once be recognized from that species 

 by its very much wider and more open umbilicus, which is 

 spirally visible from beneath (almost as much so as in the 

 Patula rotundata and Guerineana\ and by its colour being 

 less white, fresh examples having always a more or less dis- 

 tinct greenish, or yellowish, tinge. It appears to be of the 

 greatest rarity, and was first detected by Mr. Lowe near 

 Funchal, namely, beneath stones, at the edge of the Levada 

 de Sta. Luzia; and it has likewise been met with by Mr. 

 Leacock and the Eev. R. B. Watson. The Baron Paiva cites it 

 as having been taken also in the north of the island, at Sta. 

 Anna. 



The H. scintilla is indeed far more nearly akin, both in 

 colour and general features, to the (nevertheless comparatively 

 gigantic) H. festinans, Shuttl., from the island of Palma in the 

 Canarian archipelago. But, in addition to its very much 

 smaller size, its umbilicus is relatively more wide and open, its 

 spire is not quite so depressed, and its entire surface is a little 

 more polished and less sculptured, the H. festinans appearing, 

 beneath a high magnifying rjower, to be very minutely subalu- 

 taceous, and densely covered with extremely fine hair-like 

 transverse lines. 



Genus 6. PATULA, Held. 



( lulus, Woll.) 



Patula deflorata. 



Helix deflorata, Lowe, Proc. ZooL Soc. Loud. 179 (1854) 

 Pfeiff, Mon. Hel. iv. 131 (1859) 



Paiva, Mon. Moll. Mad. 27 (1867) 



Habitat Maderam ; in montibus supra Funchal semel, nec- 

 non semel a meipso in Rib. de Sta. Luzia, hactenus lecta. 



This very obscure species is still represented by a single 

 adult example (for the one which I myself met with in the 

 Ribiera de Sta. Luzia, in 1848, is immature), which was com- 

 municated to me by Mr. Leacock in 1853 as having been found 

 by the late M. Rousset near the Pico d'Arribentao, on the 

 mountains above Funchal ; and, judging from its discoidal 

 form, rather large umbilicus, and general aspect, I should be 

 inclined to regard it as a large Patula. 



If therefore the sole type which is accessible may be con- 

 sidered to be normal for its kind, the P. defloroM is a little 



