74 LAND AND FRESH-WATER SHELLS OF N. A. [PART IV. 



Very closely allied to P. Thorntonli, but a little more con- 

 vex, with longer canal. 



18. P. infrafaseiatum, AxxnoxY. 



MeJania infrafasciata, Anthony, Proc. Acad. Xat. Sci., p. 57. Feb., ISCO. Binney, 

 Check List, No. 148. Bkot, List, p. 30. REEVE, Mouog. Mt-lania, pp. 301. 



Description. — Shell conical, smooth, solid, of a pale brown color, 

 form moderately slender and elevated ; whoi'ls 8-0, decollate, slightly 

 concave; sutures distinct ; lines of growth curved and very distinct; 

 body-whorl decidedly concave, with a well marked ridge 

 revolving near the summit of the aperture, so as to make 

 a tolerably sharp angle near the middle of the body- whorl ; 

 two or three coarse strisB revolve parallel with it; below 

 this is a dark brown band, continued around the base of the 

 shell; aperture rhombic, ovate, livid and banded within; 

 columella strongly incurved, with a callous deposit its whole 

 length and well defined sinus at base. 

 Observations. — Compai'ed with J/, gradata, nobis, it is more elongate, 

 more solid and has not the carina and regularly graded whorls so char- 

 acteristic of that species ; less conical than JI. canaliculata, Say, and less 

 broad. Like 31. annuUfera, Con., in fomn, but has not the revolving 

 costaj of that species. — Anthony. 



The figure above is from Mr. Anthon3-'s type. 



18a. P. fastigiatum, Anthony. 



Mdania fastlgiata, Anthony, Ann. X. V. Lye. vi, p. 113, t. 3, f. 13, March, 1854. 

 BiSNEY, Check List, Xo. 108. Reeve, Monog. Melauia, sp. 302. 



Description. — Shell conical, smooth, moderately thick; of a pale 

 yellowish-green color, ornamented with two distinct, distant, reddish- 

 brown l)ands on each whorl, except those near the apex, 



Fig. 142. 

 which are carinate ; spire elevated, rismg from the broad 



body-whorl with regularly decreasing volume in a pyram- 

 idal form to the acute apex; whorls ten, not convex, with 

 rather indistinct sutures in a furrowed channel ; lines of 

 growth curved and strong, particularly on the penult and 

 body-whorl, where they are almost folds; body-whorl dis- 

 tinctly carinated, having one carina at the. middle, another short 

 distance below, with a broad Ijand immediately above the carince, and 



