v 



CJECILIOIDE8 OF CENTRAL EUROPE. 13 



whorl large, dilated, not equal to half the length; aperture 

 coarctate, long-piriform, very acute above, rounded below; 

 peristome unexpanded, acute, simple; outer lip arched forward; 

 columella short, strongly curved, abruptly truncate, not reach- 

 ing the base of the aperture. Length 4 to 5, diam. 1.5 mm. 

 (Moit.). 



France: drift debris of the Lez and Mosson near Montpellier 

 (MoiL). 



Caecilianella lactea MOIT., Revue et Mag. de Zool., xix, 1867, 

 p. 371. Achatina L, PFR., Monogr., viii, p. 295. C. lactaea 

 LOCARD, Ann. d'Agric. Lyon, (7), iii, 1895, p. 145. 



5. C. LIESVILLEI (Bgt.). PI. 1, figs. 11, 12, 15. 



Shell minute, turrite-oblong, slender, polished, diaphanous, 

 whitish, the apex obtuse; whorls 6, a little flattened, separated 

 by a superficial, duplicated suture, the last whorl over one-third 

 the total length. Aperture piriform-oblong; peristome acute, 

 simple, unexpanded, the right margin slightty arching forward; 

 columella straight, slightly truncate, margins joined by a thin 

 callus which bears an obsolete tubercular projection on the con- 

 vexity of the penult, whorl. Length 4 to 5, diam. 1.5 mm. 

 (Bgt.). 



France: Commonly distributed, especially northward (Bgt.). 

 Sarus river debris at Adana, S.-E. Asia Minor. 



Caecilianella liesvillei BGT., Rev. et Mag. Zool., 1856, p. 385, 

 pi. 12, f. 6-8; Amen. Malac., i, p. 217, pi. 18, f. 6-8. PFR., 

 Monogr., iv, 624. NEVILL, P. Z. S., 1880, p. 135. C. a. 

 liesvillei HESSE, Jahrb. D. M. Ges., ix, 1882, p. 332. BTTG., 

 Nachrbl. D. M. Ges., vol. 37, 1905, p. 110. 



This form is probably distinct from C. acicula. It is more 

 slender with smaller aperture, and a rather heavy callus, which 

 forms an entering ridge or nodule below the middle of the par- 

 ietal margin. While this structure is conspicuous in typical 

 liesvillei^ yet it varies in development, and is traceable in occa- 

 sional specimens of C. acicula. Dr. Boettger has identified 

 liesvillei from debris of the Kura at Borshom, Caucasus. The 

 specimens (pi. 1, fig. 15) differ from typical acicula by the ob- 

 solete parietal fold in the middle of the base of the last whorl, 



