140 NEW-YORK FAUNA — MOLLUSCA. 



lines, and vertical obtuse ribs or folds ; these latter, consisting of about twelve to fourteen in 

 number on the body-whorl, do not descend beyond the middle of that whorl, leaving only 

 revolving lines beneath. Columella with a plate of enamel, which is toothed within, and 

 truncated beneath the margin : lip toothed within. 



Color. Whitish, reticulated or spotted with rufous ; often of a yellowish hue. 



Length, 0-45-065. Width, 0-1-0-25. 



This species occurs on the shores of Staten and Long islands, but is very rare. Tt abounds 

 on the shores of the Southern States, and extends north to a short distance beyond Cape Cod. 



GENUS PYRULA. Lamarck. 



Animal incompletely known. Shell pear-shaped, turbinated or turreted, without varices or 

 umbilicus : body-whorl broad above, thence tapering downward so as to form a long beak. 

 Aperture longer than the spire : pillar more or less twisted. 



Pyrula canaliculata. 



PLATE IX. FIG. 190. 



Murex canaliculatus. Lin. Syst. 12 ed. p. 1222. 



Pyrula id. Lam. Vol. 7, p. 137, Ed. prior. 



P canaliculata, Adams, Bost. Journ. Nat. Hist. Vol. 2, p. 269. 



P. id. Gould, Invertebrata of Mass. p. 294, fig. 206. 



Description. Shell ventricose ; apex not much elevated, pointed. Whorls five or six, cari- 

 nate, flattened above : indications of obsolete varices on the lowest carination. The upper 

 whorls consist of two portions : an upper portion, nearly horizontal ; and a lower, vertical. 

 Suture deeply channelled, with an adjacent carina : numerous impressed revolving lines, par- 

 ticularly distinct on the body-whorl. Aperture oblong-ovate, ending beneath in a long and 

 narrow canal : lip simple, arched, angulated above. Columella smooth, slightly concave 

 above, and indistinctly folded beneath. Opercle oval, small. 



Color. Epidermis brown ; beneath which the shell has a faint reddish white color. 



Length, 3" 5 - 6*0 ; of aperture, including the canal, 2" 8 - 4-5. 



This is a very common shell on our coast, not extending farther north than Cape Cod : 

 with its southern limits I am not acquainted, but Dr. Gould is inclined to believe that it does 

 not range far south. It is well known, with the following species, as the Winkle, and is occa- 

 sionally eaten. The ovaries are often met with, consisting of a row of broad, circular, parch- 

 ment-like cases, connected by a ligamentous string often two feet in length. Each case contains 

 one or more of the young, which, when mature, escape from the case by a small hole opposite to 

 the side by which they are held together. When recent, the epidermis is thickly bristled with 

 threads several lines in length, through which, however, the revolving lines may be traced. 



