118 LAURIA, CANARY ISLANDS. 



Narrower; generally with a callus between angular lamella 

 and lip-insertion. 



Sculpture weak. Teneriffe, Pahna, Hierro. 



L. pythieUa. 

 Sculpture stronger and coarser. Teneriffe. 



L. tccniata. 



48. Lauria castanea (Shuttl.). PI. 15, fig. 1. 



Shell rimate-perforate, ovate-oblong, striatulate, glossy; 

 chestnut-brown the base paler; spire obtuse. Whorls 6, con- 

 vex, the last somewhat compressed at the base; suture rather 

 deep. Aperture rounded-ovate, 5-plicate : 1 strong, flexuous 

 angular lamella, remote from the angle ; one receding 

 parietal ; one strong, inflexed columellar ; two palatals, one 

 deeply immersed, the other minute, often obsolete. Peris- 

 tome fleshy-brown, thickened, expanded, the right margin 

 flexuous above, somewhat tuberculate. 



Length 3, diam, nearly 2, aperture 1 mm. (Shuttl.). 



Length 3, diam. 1.85 mm. (fig.l). 



Length 2.9, diam. 1.8 mm. 



Canary Islands: Teneriffe and Palma (Blauner). Ten- 

 eriffe, about wet rocks in the neighborhood of Garachico 

 (Lowe). 



Pupa castanea Shuttleworth, Diagn. n. Moll. no. 1 (p. 11 

 of separates), in Mittheil. Naturforsch. Ges. Bern for 1852, 

 p. 145. — Pfr., Monogr. iii, p. 550. — Mousson, Rev. Faune 

 Malac. Canaries, p. 126, pi. 6. — Wollaston, Test. Atlantica, 

 p. 452. 



There is no callus between angular lamella and right lip- 

 insertion. The lower-palatal fold is weaker than in L. 

 pythieUa or tccniata. No basal fold is seen in the specimens 

 examined. 



Wollaston considers the locality Palma as an error due to 

 confusion with L. pythieUa. He gives evidence showing that 

 the original specimens of castanea were from near Garachico. 

 He writes further: 



" As compared with the pythieUa, the P. castanea is ap- 



