EASTERN PROVINCE SOUTHERN REGION SPECIES. 367 



connected by an elevated, oblique, angular fold ; the columellar margin 

 furnished with two projecting, obtuse, curved teeth, separated by a 

 deep sinus. Orcater diameter 7, lesser G""" ; height, 3'"". 



Polygyra avara, Say, Nicb. Encycl., 3d Am. ed (1819); Jonru. Pliila. Acad., i, 277 

 (1818); (>d. BiNNEY, 11.— De Kay, N. Y. Moll., 47 (1843).— W. G. Bixney, 

 Terr. Moll., v, 268. 



Helix avara, Ferussac, Hist., pi. 1, fig. 2. — Pfeiffer, var. /3, minor, Mou. Hel. Viv., 

 i, 418 (ex parte). — Deshayes, in Fer., Hist., ii, 78, pi. I, fig. 2. — Chemmtz, 

 ed. 9., 370 (ex parte), excl. fig. — Rekve, Cou. Icon, (ox parte), No. 720, excl. 

 fig.— Bland, Ann. N. Y. Lye, vii, 30, fig. (1858).— W. G. Binney, Terr. Moll., 

 iv, 74 ; L. & Fr.-W. Sb., i, 91 (1869). 



Bwdalochila avura, Thyon, Am. Journ. Concb., iii, 155 (1867). 



Saint John's Eiver, Florida, "in Mr. Fatio's orange-grove" (Say). 

 The locality is near Eemington Landing. Jacksonville; Oak Hill (T. L. 

 Cunningham). 



P. avara. Say, may be really distinguished by its smaller size, more 

 delicate texture, and less globose form ; it has from 4 to 4J whorls, and 

 is the only species of the group which is hirsute, except P. espiloca. 

 The superior tooth on the peristome is armed with a hook, as in the 

 other species, but is narrower, less deeply seated, and more erect; the 

 inferior one is rather a distinct tooth than a lamellar fold. The parie- 

 tal process differs entirely from that of P. auriculata, as plainly shown 

 in the figure. P. avara is without the groove on the last whorl which 

 prevails in auriculata and the forms represented by Dr. Binney as va- 

 rieties of it. It has until recently been rare in collections, but now is 

 frequently collected along the Saint John's Eiver. 



Jaw with over 12 ribs. 



Lingual membrane as usual in the genus ; teeth 17-1-17, with 8 lat- 

 erals. (Terr. Moll., V, Plate XV, Fig. L.) 



**olyS^y>*a ventrosiila, Pfeiffer. 



Shell rimately perforated, globosely depressed, thin and shining, 

 pellucid, delicately striated, horn colored ; spire slightly fig.4oo. 

 raised; whorls 5, but little convex, the last one subangulated i^i; ^ 

 above, falling suddenly towards the aperture, inflated below, p ^-entronuia 

 anteriorly gibbous and contracted; aperture very oblique, ringent; 

 peristome acute, broadly reflected, its terminations scarcely approach- 

 ing each other, but joined by two white, elevated laminte, wliich are 

 placed at acute angles on the parietal wall; the basal margin is also 



