FERUSSACIA, MADEIRA. 273 



Shell ovate; outer wall of aperture calloused within; profile 

 of outer lip arcuate; parietal wall with a supraparietal fold and 

 parietal lamella, or the latter may be wanting; columella 

 strongly plicate at base. Type F. oryza. 



Closely related to Amphorella, but the aperture is less narrow 

 above and the outer lip less oblique in profile. 



66. F. TRITICEA (Lowe). PI. 38, figs. 7, 8. 



The shell is long-ovate, pale brown or brownish-yellow, with 

 a white subsutural border, glossy. Whorls 5, the last more 

 obliquely descending. Aperture ovate, slightly oblique, heavily 

 white-calloused within; the outer lip is nearly straight in pro- 

 file, being very weakly arched-forward in the middle. Parietal 

 callus moderately thick, transparent; parietal lamella strong 

 and high, entering about a half whorl (fig. 8); no supraparietal 

 lamella. Columella not truncate at base, but bearing a median 

 callosity. There is usually a long, low and indistinct palatal 

 lamella deep within, opposite the parietal lamella. 



Length 6.8, diam. 2.9, length of aperture 3.25 mm. 



Length 6, diam. 2.6 mm. 



Porto Santo: under stones in profusion, often associated with 

 the next species. 



Helix C[pchlicopd] triticea LOWE, Trans. Cambridge Philos. 

 Soc., iv, p. 60, pi. 6, f. 25, and var. biplicata, p. 61; P. Z. S., 

 1854, p. 205.Achatina triticea PER., Monogr., ii, 278; iii, 522; 

 vi, 258. Lovea triticea WOLL., Test. Atlant., p. 255. Achatina 

 paroliniana WEBB et BERTHELOT, Ann. des Sci. Nat., xxviii, 

 1833, p. 320. Bulimus parolinianus ORBTGNY, Hist. Nat. des 

 lies Canaries, Moll., p. 73, pi. 3, f. 27. 



Lowe in his first article considered this species and the next 

 to be varieties of a single species, designating the one as biplicata 

 the other as edentula. Wollaston has ably discussed the syn- 

 onymy, showing that the type of A. paroliniana is F. triticea 

 and the alleged Canarian locality is without reputable basis. 

 Mabille (Nouv. Arch, du Mus. viii, p. 148) has wasted ink on 

 the subject. 



F. triticea is related to F. oryza, but readily distinguished by 

 the conspicuous parietal lamella and stronger columellar fold. 

 Lowe's type measured length 6, diam. 3 mm. 



