CANARIAN GROUP. 455 



Habitat TenerifFam, Palmam, et Hierro ; in sylvaticis edi- 

 tioribus humidis prsecipue occurrens. 



This interesting little Papa is widely spread throughout the 

 Canarian arcliipelago, of which it is eminently characteristic, — 

 occurring in damp, and more or less sylvan, spots of a rather 

 high elevation. It has been obtained in Teneriffe, Palma, and 

 Hierro ; and we may be pretty sure that it will be found to 

 exist equally in at all events Grrand Canary and Gromera. In 

 Teneriffe I met with it in the forest district above Taganana, as 

 well as at the Agua Grarcia and in the wood of La Esperanza 

 near Laguna ; in Palma (where it was taken by Mr. Lowe at El 

 Monte above Barlovento) on the ascent of the Cumbre above 

 Buenavista, as well as on wet rocks in the Pinal (near to the 

 edge of the great Caldeira) at the head of the small stream 

 which supplies the Levada of the Banda ; and, in Hierro, in the 

 dense forest region of El Golfo. 



The P. pythiella is a distinctly smaller, narrower, and more 

 oval (or less ovate) species than the castanea, as also more 

 lightly striated, and not quite of such a dark castaneous- 

 brown, — the whole surface having often a slight olivaceous 

 tinge, and the apical region being generally more or less pale 

 and decorticated ; its whorls are much more flattened, and the 

 suture consequently less impressed ; and its aperture is less de- 

 veloped, — the margins of its peristome (which is appreciably 

 whiter and less expanded) being less wide apart, and the right- 

 hand one straighter or less outwardly rounded towards the 

 insertion (as well as less tuberculiform within). Its upper 

 ventral plait too is relatively thicker and more sinuate, and 

 usually joined to the angle of the lip by a corneous sphincter.' 



Pupa tseniata. 



T. prsecedenti affinis, et forsan vix certe distincta. Differt 

 prsecipue testa grossiiis plicatulo-striata, anfractibus vix magis 

 convexis, necnon colore omnino pallidiore, — sc. olivaceo-corneo, 



' The P. pi/tMella belongs to somewhat the same type as the P. Loneana 

 of Madeira, which is perhaps its nearest ally from that island, having also a 

 good deal in common with the P. lanrmea. It is however very much smaller 

 than both of those species, particularly the former ; and the denticle of the 

 lip which is so strongly developed in the Lomeana is here usually obsolete, — 

 it being but seldom expressed, and for the most part merely represented by 

 a slight internal thickening, often barely traceable, in the accustomed place. 

 In other respects the P. pythiella is a barrel-shaped little species, having 

 much the outline of the P. Loweana ; but it is more shining and less coai'sely 

 striated, its volutions are less convex, the upper columellary plait is quite 

 absent, and its outer ventral one (which is usually joined by a rather less 

 thickened sphincter with the angle of the lip) is relatively a trifle longer, 

 thinner, and more sinuate. Indeed this sphincter seems eminently vai'iable, 

 for in some examples (particularly those from Palma) it is, as in the case of 

 the Madeiran P. concinna, altogether absent. 



