08 MADEIRAN SPECIES OF LAURIA. 



Lowe, Kichard Thomas: Primitiae Faunas et Floras Mad- 

 eras et Portus Sancti ; sive species quaadam novae vel hactenus 

 minus rite cognitae Animaliiun et Plantarum in his Insulisi 

 degentiuni breviter descriptas; in Transactions of the Cam- 

 bridge Philosophical Society iv, part 1, 1831. Reprinted 

 with a prefatory Address and an Appendix, 1851. Also 

 papers in the Annals and Magazine of Natural History 1852 

 and the Proceedings of the Zoological Society of London, 

 1854. 



Albers, Johann Christ. Malacographia MaderensiS 

 Berlin, 1854. 



Paiva, Barone de Castello de. Monographia Mollus- 

 corum terrestrium nuvialium lacustrium Insularum Mader- 

 ensium, 1867. 



Pfeifper, L. Monographia Heliceorum Viventium. Mad- 

 eirans in several volumes. 



Wollaston, T. Vernon. Testacea Atlantica, or the land 

 and freshwater shells of the Azores, Madeiras, Salvages, 

 Canaries, Cape Verdes and Saint Helena. London 1878. 



Section Scarab ella Lowe. 



Scarabella Lowe, Ann. Mag. N. H. (2), is, 1852, p. 277 

 (in text under Pupa cassida) ; Proc. Zool. Soc. 1854, p. 212, 

 Monotypic for P. cassida-. 



Solid; ovate, the whole spire tapering conically, of nearly 

 flat whorls; umbilical area small. The aperture has numer- 

 ous teeth, all of them emerging to the peristome ; the angular, 

 parietal and columellar lamellae and lower-palatal fold enter 

 deeply. 



By the shape of the aperture and spire the single species' 

 of this section has some resemblance to L. chcilogona; in 

 teeth it is more like cassidula. Though strongly differen- 

 tiated, Scarabella probably arose from the ancestral stock of 

 these Leiostylas. By having callus within the outer and 

 basal margins of the lip it resembles L. calathiscus, which is 

 otherwise quite different. 



25. Lauria cassida (Lowe). PI. 14. fig. 1. 



The shell is ovate-conic, compact, solid; perforate, with a 

 very small umbilical excavation ; surface with little gloss, re- 

 gularly rib-striate, the base very finely striate ; buff, more 1 



