LAURIA. 43 



this form makes a transition to P. raymondi, which has three 

 columellar folds of equal strength. One specimen. Sudak, 

 Crimea, on the strand. [Pupa (Orcula) doliolum var. inter- 

 media Retowski, Malak. Blatter, n. F., vi, 1883, p. 59.] 



Retowski supposed that this, together with specimens hav- 

 ing two columellar folds, and many other species of land 

 shells, floated from Transcaucasia or Asia Minor, as they 

 were not found by him anywhere inland in the Crimea. 



Originally described as a form of 0. doliolum, Retowski 

 subsequently (1889) regarded it as an intermediate link be- 

 tween bifilaris and trifilaris (an erroneous opinion). Of two 

 specimens found at Samsun, one had only a weak, short 

 middle fold near the peristome, but in the other this fold is 

 as long as the other two, but is notably weaker, while in ray- 

 mondi and trifilaris the middle fold is the strongest [being 

 the columellar lamella proper] . 



Genus LAURIA Gray. 



Cochlodon Lowe, Trans. Cambr. Philos. Soc, iv, 1831, p. 62 

 (emendation of Cochlodonta Fer., a subgenus of Helix) ; first 

 species, here designated type, Helix C. anconostoma. 



Laurki Gray, in Turton's Manual of the Land and Fresh- 

 water Shells of the British Islands, new edit., revised by J. E. 

 Gray, 1840, p. 193, for P. umbilicata and P. anglica; P. Z. S., 

 1847, p. 176, type Pupa umbilicata. — Herrmannsen, Indicis 

 Gen. Mai., i, May 25, 1847, p. 578, type: Pupa umbilicata 

 Drap. 



Eruca Swaixsox, Malacology, 1840, p. 334, no type selected. 

 — Herrmaxxsex, Indices Gen. Malac, i, p. 428, type: Pupa 

 umbilicata Drap. 



Gastrodon Lowe, Ann. Mag. N. H., Apr. 1852, p. 275, for 

 Pupa fanalensis only; P. Z. S., 1854 (1855), p. 207, "type P. 

 umbilicata Drap." Not Gastrodon Eaf., 1815. 



Reinhardtia Boettger, Jahrb. D. malak Ges., vi, 1879, pp. 

 29, 403 (restricted to group of P. cylindracea DaC). P. 

 cylindracea is here designated type. 



The shell is perforate and rimate or umbilicate, ovate, ob- 

 long-conic or cylindric, having a deeply penetrating angular 

 lamella (rarely wanting) and often other teeth, the immature 

 (neanic) stage with lamella? on the parietal wall and columella 



