MADEIRAN GROUP. 69 



Arion rufiis, Morel., Hist. Nat. des Agar. 137 (1860) 

 „ ater, Paiva, Mon. Moll. Mad. 2 (1867) 

 „ „ Watson, Journ. de Conch. 221 (1876) 



Habitat Maderam ; prsecipue in editioribus, rarissiraa. 



This European Avion (which is recorded also at the Azores) 

 is decidedly somewhat scarce in Madeira, and is found prin- 

 cipally at rather high elevations. I have taken it however 

 pretty plentifully at the Pico do Infante (nearly 3000 feet 

 above the sea), and it was met with by Mr. Lowe in the chest- 

 nut woods at the Mount, as well as at Camacha, and on the 

 side (ascending from the Curral) of the Pico Grande. It is a 

 decided Avion, — its respiratory orifice being very anterior in 

 position, the mucous gland at its extremity large and distinct, 

 its body totally uncarinated, and its shield even and arenaceo- 

 granulate (instead of being uneven and wrinkled, as in the 

 LiTnaces). 



The colour of this slug (which varies from about 1-^ to 3 

 inches in length), is usually dusky-brown with an ochre tinge 

 (i.e. somewhat of a dark olivaceous-drab), the sides however 

 being gradually a little paler; and it is, therefore, anything 

 but that (at all events when in its normal state, for it is now 

 and then blacker) which is implied by its specific title ; and the 

 edge of its pedal disk (or foot) is of a clear ochreous-yellow 

 (sometimes approaching to orange), with the transverse lines 

 dusky, distant, and pretty regular, though occasionally obscure. 

 This edge (the colouring matter of which would seem to be 

 somewhat moveable) appears at times white, with a narrow 

 orange line immediately within it. 



Grenus 2. LIMAX, Linne. 

 Limax gagates. 



Limax gagates, Dvap., Hist. Nat. 122. pi. 9. f. 1, 2 (1805) 

 „ antiquorum, var. a., Loive, Gambv. Phil. S. Trans. 



iv. 39 (1831) 

 „ gagates. Id., Pvoc. Zool. Soc. Lond. 162 (1854) 

 „ „ Alb., Mai. Mad. 12. t. 1. f. 3-5 (1854) 



„ „ Morel, Hist. Nat. des AQOv._l?>d {I'^QO) 



„ „ Paiva, Mon. Moll. Mad. 3 (1867) 



„ „ Watson, Journ. de Conch. 221 (1876) 



Habitat Maderam, et Portum Sanctum ; in ilia vulgaris, 

 sed in hoc rarior. In graminosis intermediis prsecipue degit. 



The L. gagates, which is widely spread throughout Europe, 

 and which occurs also in the Azorean Gfroup and even at 

 St. Helena (where it has probably been introduced along with 



