54 LAURIA. 



or shorter. It stands extremely close to anconostoma. Fig- 

 ured from a Wollaston specimen in the Tomlin collection. 



A young specimen of perdubia, pi. 6, fig. 14, of 4 whorls, 

 shows four palatal lamina? at closer intervals than in any 

 anconostoma or cylindracea seen. In another smaller shell 

 there are three lamina? at similarly close intervals. 



Deshayes' name Pupa dhorni was presumably an error for 

 dohrni; Sandberger has referred to it as Carychiopsis dohmi. 

 In the absence of proof of error, the name can hardly be held 

 to invalidate P. dohrni Pfr. 



2. Lauria umbilicus (Roth). PI. 6, figs. 19, 20. 



The shell is narrowly umbilicate within, the umbilicus en- 

 larging funnel-like at the opening; ovate, thin, dilute brown, 

 somewhat transparent, weakly striatulate. The whorls are mod- 

 erately convex, the last somewhat contracted behind the aper- 

 ture, pinched out below to form a prominent keel around the 

 umbilicus, the keel bordered by an impressed line within the 

 latter. The aperture is somewhat narrowed and subangular 

 basally. Lip reflected, thickened within, the thickening ex- 

 cised above. A small angular lamella connects with the outer 

 lip-insertion, and is continued inward as a thread-like lamella. 

 No columellar lamella. Length 2.9, diam. 1.5 mm. ; 5y 2 whorls. 



Greece: Island of Syra (Roth and others). Southern Dal- 

 matia and Albania (Kuester). 



Pupa umbilicus Roth, Molluscorum species quas in itinere 

 per Orientem etc., Diss. Inaug., 1839, p. 20, pi. 2, f. 3. — Kues- 

 ter, Conch. Cab., p. 25, pi. 3, f. 18, 19. — Pfr., Monogr., ii, 

 330; iii, 542. 



This has been considered a variety of L. cylindracea by 

 Kobelt. It differs from that by the much more strongly de- 

 veloped basal keel ; and until intergradation is demonstrated, 

 may well be left apart. The figured specimen is from S. 

 Giorgio, Syria. 



3. Lauria vulcanica (Kuester). PI. 7, fig. 1. 



The shell is very small, egg-shaped, very blunt, nearly 

 smooth with a silky luster, thin- walled, transparent; color 

 horn-yellow or pale yellow. Base compressed; neck round, 



