274 FERUSSACIA, MADEIRA. 



67. F. ORYZA (Lowe). PL 38, figs. 10, 11, 12. 



Shell similar to triticea except in the aperture. The blunt 

 and slightly sinuous outer lip has a heavy smooth white callus 

 within. The parietal callus bears a low oblong supraparietal 

 nodule, but no parietal lamella, and the columella, though well 

 twisted within, shows nearly straight in a front view. Length 

 6, diam. 2.7 mm. 



Porto Santo: common under stones on the mountains. Also 

 found as a fossil. 



Helix triticea var. edentula LOWE, Trans. Cambr. Philos. Soc. 

 iv, 1831, p. 61, pi. 6, f. 26 (not Helix edentula Dr&p.).Buli- 

 mus parolinianus ORB. (in part), Moll. Canaries, pi. 2, f. 29. 

 Achatina oryza and A. tuberculata LOWE, Ann. and Mag. N. H. 

 (2 ser.) ix, p. 120 (Feb. 1852). Achatina tandoniana SHUTTLE- 

 WORTH, Bern, Mittheil. 1852, p. 293. Lovea oryza Lwe., WOL- 

 LASTON, Test. Atlant. p. 252. Azeca triticea and A. oryza BGT., 

 Revue et Mag. Zool. 1858, pp. 537, 538. 



Certainly related to the externally very similar F. triticea, but 

 in oryza the parietal lamella is wanting or reduced to an indis- 

 tinct rudiment. 



The variety tuberculata Lowe (pi. 38, fig. 9) differs by being 

 larger, more ventricose, with the supraparietal tubercle larger 

 and the parietal lamella represented by an amorphous callus. 

 Length 6.7, diam. 3 mm. 



The reported occurrence of this species in the Canary Islands 

 has been shown by Wollaston to be based on error. The type 

 of the supposedly Canarian A. tandoniana was from Pico Branco, 

 in Porto Santo. 



Section Hypselia Lowe. 



Hypselia LOWE, P. Z. S., 1854, p. 202, type and sole species 

 A. producta. 



Shell fusiform-ovate, thin, the outer wall of the aperture with 

 a thin internal callus or none; parietal wall smooth; columella 

 more or less plicate. Type F. producta. 



The type of this group is intermediate between Amphorella 

 and such forms as F. terebella. 



