MADEIRAN GROUP. 255 



said to be labelled ' Pico Branco,'— a fact which at once solves 

 the mystery ; for ' Pico Branco ' is evidently the very moun- 

 tain in Porto Santo where these two Loveas are found in 

 the greatest abundance, and associated ! I know of no 

 other ' Pico Branco ' throughout the whole of these Atlantic 

 archipelagos, and I have the most positive evidence that 

 Webb ascended Pico Branco many times, in 1828, in com- 

 pany with Mr. Lowe, for the express purpose of collecting 

 shells and plants. So that I have no more doubt that the 

 l A. TaudonianaJ which Shuttleworth eliminated (in 1852) 

 from Webb's previously described l A. Paroliniana,'' is the 

 Porto-Santan L. oryza, Lowe, than I have that the A. Paro- 

 liniana proper is (as is proved to a demonstration by the 

 British-Museum type) the equally Porto-Santan L. triticea. 



Lovea triticea. 



Helix triticea, a. biplicata, Loive, I. c. 61. t. 6. f. 25 (1831) 

 Achatina Paroliniana (pars), W. et B., I. c. Syn. 320 (1833) 

 Bulimus Parolinianus „ d'Orb., in W. et B. Hist. 73 



(1839) 

 Achatina triticea, a. biplicata, Pfeiff., Mon. Hel. ii. 278 



(1848) 

 „ „ Lowe, Proc. Zool. Soc. Lond. 205 (1854) 



Glandina triticea, Alb., Mai. Mad. 57, t. 15. f. 5, 6 (1854) 

 Alsobia Paroliniana, Bourg., Amen. Mai. ii. 94 (1858) 

 Azeca Paroliniana, Pfeiff., Mon. Hel. iv. 646 (1859) 

 Achatina triticea (pars), Paiva, Mon. Moll. Mad. 109 (1 867) 

 Azeca Paroliniana, Mouss., Faun. Mai. des Can. 128 (1872) 

 Lovea triticea, Watson, Proc. Zool. Soc. Lond. 680 (1875) 



Habitat Portum Sanctum; sub lapidibus, prsesertim in 

 editioribus, una cum L. oryza degens, copiosissime occurrit. In 

 statu semifossili in calcareis invenitur. 



This is the commonest of the Loveas of Porto Santo, — 

 where it occurs beneath stones, often in great profusion, and 

 more or less associated with the L. oryza, on most of the 

 mountain slopes. I have already mentioned that it very 

 closely resembles the latter ; nevertheless there can be no pos- 

 sibility of confounding the two species, — the strongly developed 

 medial ventral plait within the aperture of the L. triticea, 

 added to the fact that the callosity of its columella is likewise 

 appreciably increased, being of themselves quite sufficient to 

 distinguish it from its ally. It is also, perhaps, on the average, 

 just perceptibly smaller than the normal state of the oryza; 

 its colour is usually darker, or of a more corneous brown; and 

 there seems to be no indication of the subvertical ventral 



