THE NATURAL HISTORY SURVEY. 323 



Melania elongata LEA, Trans. Amer. Phil. Soc., Vol. IV, p. 121, pi. xv, 

 fig. 29, 1834. 



Shell: Elevated, acute, turreted on the upper whorls; 

 color yellowish-horn, olivaceous or greenish-horn, encircled by 

 a yellow band just below the suture, and with two purplish 

 bands encircling the whorls just above and below a line drawn 

 about the center of the whorl; apex sharp; surface shining and 

 polished, encircled by from three to five fine spiral raised lines, 

 of which the lower one is the larger, situated just above the 

 suture, giving the shell a carinated aspect; this carina is espe- 

 cially noted at the periphery; the base of the shell is encircled 

 by five spiral ridges of greater or lesser prominence; lines 

 of growth numerous, crowded, oblique, giving the surface a 

 wrinkled aspect; sutures impressed; whorls ten to eleven, flat 

 sided, regularly increasing, the upper ones doubly carinated 

 and the lower ones with a single carina, although" in some .ex- 

 amples the carina almost disappears on the lower whorls; spire 

 very long, long-conic; base of shell broadly conic, angulated, 

 imperforate; aperture obliquely triangulate, produced at the 

 lower part into a short spout; yellowish-horn within, with a 

 broad, reddish-brown band encircling the base near the col- 

 umella and descending the spout-like projection in the lower 

 part of the aperture, with another band near the center; peri- 

 stome thin, sharp, simple, sinuous; columella thickened by a 

 heavy white callus which is reflected over the columellar region 

 and columellar lip. Operculum similar to that of subulare. 



Length, 21.00; width, 8.00; aperture length, 8.00; width, 4.00 mill. (8743.) 



22.00; " 8.50; " " 7.50; " 4.00 " (8740.) 



31.00; " 12.00; " " 8.00; " 4.00 " (8743.) 



39.00; " 12.00; " " 10.00; " 5.50 " (9963.) 



24.50; " 9.50; " " 9.50; " 4.50 " (9966.) 



Animal: Similar in general form to subulare ; color yel- 

 lowish, streaked with black on top of rostrum and foot; the 

 rostrum is rather long and much roughened by spiral ridges; 

 foot wide, short and whitish beneath; eyes placed on swellings 

 on the upper surface of the base of the tentacles. The speci- 

 mens examined were mostly females, with the lateral sinus 

 very prominent. 



Jaw: As in subulare. 



Radula formula : ^ + T I + \ + *-!-* + l+yiir+iV (3~ ' 

 3); teeth generally as '^subulare; the intermediate tooth has 

 five outer cusps instead of three, as in subulare; the inner lat- 



