EASTERN PROVINCE INTERIOR REGION SPECIES. 287 



acutely carinated, the carina of the upper whorls compressed aud 

 overlapping the sutures, as in Patnla Cumberlandiana, The umbilicus, 

 as in the most carinated form of T. paUiata, is not always entirely cov- 

 ered by the reflected peristome. 



Var. ft. — Whorls subexserted, carina less acute and prominent, par- 

 tially obsolete behind the aperture, not covering the sutures. Greater 

 diameter 24, lesser 19"°'; height, 8°"°. (5 whorls.) Columbus, Ga. 

 This variety connects T. Carolinicnsis with T. ohstricta, and is gener- 

 ally found in cabinets under the former name. 



Var. ;;/. — Whorls more convex, the last obtusely angulated in front 

 of but \erj little behind the aperture. Greater diameter 21, lesser 

 27mm. ijeight, 7^""". (5 whorls.) South Carolina. This is the typical 

 T. CaroUniensiSj holding precisely the same relation to ohstricta as pal- 

 liata to palliata var. y. Also found in Tennessee and Georgia. 



Jaw as usual; over 10 ribs. 



Lingual membrane (Terr. Moll., V, Plate VII, Fig. P) has 33-1-33 

 teeth ; 10 perfect laterals ; very like T. palliata. My figures are drawn 

 from that part of the lingual membrane which has the cutting points of 

 its teeth quite blunt. Other portions of the membrane would furnish 

 much more sharply pointed teeth. 



The genital system resembles exactly that of T. palliata, Say, as fig- 

 ured by Dr. Leidy, Terr. Moll., I, Plate VII, Fig. 8. (See that species.) 



Triodopsis appressa, Say. 



Shell with the umbilicus covered, orbicularly depressed, pellucid, 

 with rib-like strife and minute revolving lines, reddish fig. 306. 

 horn-colored; spire flattened; whorls 5, flattened above, 

 the last obtusely angular (the angle obsolete anteri 

 orly) ; aperture oblique, compressed, subtriangular ; 

 peristome angularly broadly reflected, thickened within, 

 its terminations joined by a thin callus, on which is an t. appressa. 

 obliquely entering, erect, curved, tongue-shaped tooth, the basal 

 margin with a lamellar-like, long denticle, the right margin some- 

 times with an erect, tooth -like callus. Greater diameter 18, lesser 15™™; 

 height, 8'"™. 



Helix appressa, Say, Joiiru. Phila. Acad., ii, 151 (1S21); ed. Binney, 15.— Binney, 

 Bost. Journ. Nat. Hist., iii, 356, pi. viii, (1840); Terr. Moll., ii, 140, pi. xiii.,— 

 De Kay, N. Y. Moll., 27, pi. ii, fig. 11 (1843).— Pfeiffer, Mod. Hel. Viv., i, 

 317; in Chemmitz, Conch., ed. 2, i, 361, t. Ixiii, figs. 17, 18.— Reeve, Con. 

 Icon., No. 689.- Deshayes, in Fek., Hist., i, 141.— W. G. Binney, Terr. 

 Moll., iv, 59; L. & Fr.-W. Sh., i, 126, fig. 211 (1869).— Bland, Ann. N. Y. 

 Lye, vii, 432. 



