MADEIRAN SPECIES OF LAURIA. 105 



the red volcanic soil on the great western promontory known 

 as the Pedragal (Wollaston). 



Pupa macilenta Lowe, Ann. Mag. (2), ix, 1852, p. 276. — 

 Wollaston, Test. Atl. p. 225. 



Group of L. ferraria {Craticula Lowe). 



Craticula Lowe, Ann. Mag. N. H. (2), ix, 1852, p. 277, for 

 P. fusca, millegrana, ferraria; P. Z. S. 1854, p. 211, " typ, 

 P. substriata Jeffr." — v. Martens, Die Heliceen, 1860, p. 

 295, "Typus P. calathiscus Lowe." — Eryma Albers, Malac. 

 Mader. 1854, p. 67, for P. calathiscus (here designated type), 

 P. cassida, P. cassidula, P. gibba. 



Cylindric, ribbed or costulate forms with strongly convex 

 whorls (except L. abbreviata), the aperture as in Leiostyla 

 proper. The first three species are from Madeira, the rest 

 from Porto Santo. Type of Craticula is L. ferraria Lowe. 



Lowe formed a section for part of these species, but the 

 group is connected so closely with species immediately pre- 

 ceding that a separate designation is scarcely needed. Lowe 

 and von Martens subsequently, nominated type-species for 

 Craticula which were not mentioned in the original proposi- 

 tion of the group, therefore not available. The note on 

 Craticula. in vol. xxvi, p. 233 should be deleted; the writer 

 was misled by Lowe's unlawful type designation. 



This group includes all of the Lauriae of Porto Santo and 

 a few species of Madeira. 



37. Latria fusca (Lowe). PI. 13, figs. 10, 11. 



The shell is cylindric with blunt, rounded summit, tawny 

 or somewhat olivaceous pale brown with a chestnut-brown 

 band, faint or distinct. Surface rather shining when clean, 

 with close sculpture of regular striae (fine costulae), which 

 are but slightly oblique, either a little weaker or coarser on 

 the last whorl ; about 18 riblets in one mm. on the last whorl 

 near suture. The whorls are rather strongly convex. 

 Angular lamella is weakly denticulate on the right side, op- 

 posite the lip-tooth, and is bifid anteriorly, giving off a strong 

 callous ridge to the lip-insertion. Parietal lamella nearly as 



