FERUSSACIA, MADEIRA. 269 



/ 3 . Shell about 8.5x2.5 mm.; pari- 

 etal callus thin, foldless; callus 

 within the outer wall thin. 



F. producta, no. 68. 



e\ Outer lip moderately arched in profile 

 view, subvertical in general direction. 

 /. Shell oblong, 8 to 8.5 mm. long; 

 parietal callus thin and smooth, 

 columellar fold rather weak. 



F. folliculus, no. 1. 

 /'. Shell ovate, 6 to 7 mm. long. 



g. A strong entering parietal 

 lamella. F. triticea, no. 66. 

 g l . No distinct parietal lamella; 

 a low supraparietal nodule. 



F. oryza, no. 67. 



d\ Outer lip thin, without an internal callus. 

 e. Outer lip very strongly arcuate in pro- 

 file, retracted above; shell 3.7x1.6, 

 aperture 1.5 mm. 



F. leacociana, no. 72. 

 e l . Outer lip moderately arcuate in profile. 

 /. Shell very fragile, 4x1 mm. 



F. gracilis, no. 71. 

 /'. Shell larger, 5 to 7 mm. long. 

 F. terebella, no. 70; F. iridescens, no. 69. 



Subgenus AMPHORELLA Lowe. 



Amphorella LOWE, Ann. Mag. N. H. (2), ix, 1852, p. 120 

 (for A. mitriformis; A. tornatellina also mentioned), P. Z. S., 

 1854, p. 202, type A. tornatellina. Agraulina BOURGUIGNAT (in 

 part), Revue et Magazin de Zoologie, Dec., 1858, p. 530, 537, 

 for triticea, oryza, tuberculata, tornatellina, melampoides, mitriformis. 

 Lovea WATSON, P. Z. S., 1875, p. 677, for melampoides, torna- 

 tellina, triticea, oryza. 



Shell rather large and solid, ovate; upper part of the aperture 

 very narrow, acuminate, the outer wall strongly thickened 

 within; outer lip in profile descending obliquely forward ; parietal 



