132 AGxVRDHIA. 



is one of convergence, since loss of lamellae in some of the 

 latter group was doubtless a relatively recent event. The 

 Paracoryna species has already reached a more mature stage 

 of tooth reduction in the Lower Miocene. 



Tertiary species of Agardhia. 

 (Contributed by Dr. W. Wenz, Frankfurt a. M.) 



1. Agardhia bacillus (Paladilhe). Pupa bacillus Pala- 

 dilhe, Rev. Sci. Nat., II, 1873, p. 31, pi. 2, figs. 16-18. Middle 

 Pliocene, Plaisencien : Celleneuve near Montpellier. 



2. Agardhia oppoliensis (Andreae). Coryna oppoliensis 

 Andreae, Mitt. a. d. Roemer-Museum, Hildesheim, no. 18, 

 1902, pp. 16, 27, fig. 8a; with var. turrita, fig. 8b. Upper 

 Miocene, Tortonien : Landschneckenmergel, Oppeln. 



3. Agardhia praeambula (Flach). Pupa (Coryna) prae- 

 ambula Flach, Verhandl. d. phys.-med. Ges. Wurzburg, n. F-, 

 XXIV, 1890, p. 50, pi. 3, fig. 2. Upper Miocene, Tortonien : 

 Braunkohlenton, Undorf bei Regensburg. 



4. Agardhia proexcessiva (Sacco). Pupa {Coryna) pro- 

 excessiva Sacco, Mem. R. Accad. Sci. Torino, CI. Fis., Mat. e 

 Nat. (2), XXXIX, 1888, p. 76, pi. 1, fig. 2; I Moll. terr. Terz. 

 Piemonte, pt. 22, 1897, p. 70, pi. 6, f. 4- — Coryna praeexces- 

 siva (Sacco), Flach, Verhandl. "Wurzburg, XXIV, 1890, p. 7. 

 Upper Pliocene, Astien: Tassarolo, Prov. Alessandria, Pied- 

 mont. 



5. Agardhia pseudoennea (Flach). Pupa (Coryna) pseu- 

 doennea Flach, Verhandl. d. phys.-med. Ges. Wurzburg, n. F., 

 XXIV, 1890, p. 51, pi. 1, fig. 5. Upper Miocene : Tortonien : 

 Braunkohlenton, Undorf bei Regensburg. 



Subgenus Paracoryna Flach. 



Paracoryna Flach, Palaeontologische Beitrage, in Verhandl. 

 d. phys.-med. Ges. Wurzburg, n. F., XXIV, 1890, p. 4 (for 

 diezi and retusa). 



Aperture wholly toothless. Surface finely, irregularly stri- 

 ate with occasional more strongly raised striae. Very similar 

 in habit to the Pupilke (Flach). Type: P. diezi Flach. 



