282 CRYPTAZECA. 



74. F. CYLICHNA (Lowe). PI. 39, figs. 28, 29. 



The small, thin shell is cylindric-oblong, about equally blunt 

 at the two ends; smooth. The spire is wide, with convex out- 

 lines and a very obtuse summit. Whorls 4, but slightly con- 

 vex, rapidly widening. Aperture piriform, acuminate above. 

 The outer lip is thin, in profile sloping forward from the suture 

 down, broadly rounded below the middle. The parietal callus 

 forms a thick elevated cord except near the posterior or upper 

 angle, and in the middle bears a very strong horizontal entering 

 parietal lamella. Within the outer lip there is a strong com- 

 pressed palatal fold at its lower third, and two minute tuber- 

 cular marginal tubercles at the upper third. The columella 

 projects as a prominent horizontal fold above the deep basal 

 truncation. Length 2.7, diam. 1.1, aperture 1.4 mm. 



Madeira: Canigal (Lowe, type loc.) and Point Sao Lourenco 

 (Grabham), abundant as a fossil. Not found living. 



Achatina cylichna LOWE, Ann. Mag. Nat. Hist. (2 ser. ), ix, 

 p. 119 (Feb., 1852); P. Z. S., 1854, p. 206. Lovea cylichna 

 WOLLASTON, Test. Atlant., p. 264. 



Distinct from all other species by its pupiform shape, the 

 strong lower palatal plica and prominent parietal and columellar 

 lamellae. F. ovuliformis is the only closely related species. 



Glandina cylichna Albers, Malacographia Maderensis, p. 84, 

 pi. 17, f. 19, 20, very imperfectly represents this species. 

 Bourguignat has gravely copied Albers' wretched figure, insert- 

 ing it as ' ' Csecilianella cylichna" in his monograph of Csecilia- 

 nella, Revue et Mag. de Zoologie, 1856, p. 429, pi. 12, f. 26. 



Genus CRYPTAZECA de Folin et Berillon. 



Cryptazeca DE FOLIN ET BERILLON, Bull. Soc. Borda, 1876, 

 p. 1. 



Shell ovoid, thin, of 6 whorls; aperture half the total length, 

 ovate- piriform; no parietal lamella; outer lip thin, arched for- 

 ward; columella short, abruptly truncate at the base. 



Animal (of C. monodonta^) grayish-ruddy above, the top of the 

 head nearly black, below whitish; upper tentacles strong, sub- 

 inflated at their apices, blackish, with a moderate sized ocular 

 dot; lower tentacles widely separated and shorter. Head pro- 



