420 PROCEEDINGS OF THE ACADEMY OF [April, 



Poecilozonites circumfirmatus Redf. 



Helix circwmfirmata Redfield, Ann. Lye. X. H. of X. Y., VI, p. 16. 

 Pcecilozonites circumfirmatus Pilsbry, Proc. Acad. Nat. Sci. Phila., 1888, p. 

 291. 



The modern variety comes from both formations at locaUty 806, 

 and from 814 and 808. Those from locahty 808 are some of them more 

 keeled than is now usual. A series of poor specimens from No. 807 

 seem to bridge the gap from these to var. discrepans. 



This species has lost less in size than the others of its genus. My 

 largest fossil, coming from locahty 808, has alt. 7, diam. 12 mm. My 

 largest recent shell has alt. 7, diam. 11.5 mm. I think the fossils 

 average larger than the adults of the recent shells, but it is not 

 easy to eliminate the immature of either. 



Poecilozonites circumfirmatus vp- discrepans Pfr. 

 Helix discrepans Pfr., Malak. Bl., 1S64, p. 1. 



Localities 807, 818 and two specimens of doubtful identity from 806. 

 Some from 818 are extremely flat and carinate, one of them having 

 alt. 4.8, diam, 10.5 mm. If this were the only locality that yielded 

 the variety it would undoubtedly rank as a distinct species. 



I should like to raise the question wdiether Poecilozonites discrepans 

 is not one of the extinct varieties. I believe it has not been treated 

 as such heretofore, but none were foimd last summer any more recent 

 than those from this sand pit. 



Eaconulus turbinatus n. sp. PI. XXXVI, figs. 8, 9, 10. 



Shell acutely conic, with contour very slightly convex; minutely per- 

 forate, thin, glistening yellowish-corneous, closely striate, and sculptured 

 with microscopic spirals. Apex rounded off abruptly. Whorls 7^, 

 not convex, narrow, the last strongly angulate at the periphery. 

 Suture simple, hardly impressed. Base rather flat, not excavated. 

 Aperture almost quadrangular, but with the angle at the columella 

 indefinite. Columella slightly curved, the columellar margin narrowly 

 reflexed. Alt, 3.4, diam. 2.8 mm, (from locality (807) ; diam. 3 mm. 

 (from locahty 808). 



From locahties Nos. 807, 806, 814, 816, 808, and 818. 



The above description is a composite. The general form is described 

 from the specimen from locality 807, but the sculpture is that of the 

 best specimen from 806, which should, perhaps, be considered the type, 

 and the base and aperture are taken from the specimen from 808. 

 From 814 comes the longitudinal section of one 3.8 x 2.8 mm., with an 

 unusually convex contour. 



The genus Euconuhis is, of course, not wholly satisfactory for this 

 species. 



