130 NEW- YORK FAUNA MOLLUSCA. 



C. Urebrale. (Id. lb. Vol. 3, p. 320, pi. 3, fig. 7. Pl. 8, fig. 172 of this book.) Whorls 10 - 12, 

 flattened, with three or four elevated revolving ridges on each, with numerous fine longitudinal 

 lines between the ridges. Base of the shell abrupt : aperture oval, about one-eighth of the length 

 of the shell; canal very short. Color, reddish brown. Length, 0*5 ; width, 0*12. Massachu- 

 setts. 



C. greeni. (Id. lb. Vol. 2, p. 287, pi. 4, fig. 12.) Shell very small, cylindrical; beneath, deeply 

 " rugose, with longitudinal ridges and revolving lines. Canal very deep and very short, slightly 

 curved. Aperture one-eighth of the shell, nearly circular. Color, reddish brown. Length, 0»2 ; 

 width, 0*05. Massachusetts. 



C. muscarum. (Say, Am. Conchol. pi. 49, fig. 1.) With distant longitudinal prominent ribs, with 

 spiral stria?, which give them a crenate appearance. Striae 5 on the body-whorl, 4 on the second, 

 with smaller parallel stria? : ribs 1 1 on the body-whorl. Whorls 9, somewhat convex ; suture in- 

 dented, distinct ; aperture oblique, oval-orbicular ; pillar-lip concave. Color, white, with reddish 

 brown longitudinal and spiral spots. Florida. 



FAMILY PURPURIDsE. 



Animal furnished with a trunk, but not with a veil. Tentacles with the eyes on their middle 

 portion, and external. Marine. Shell very variable in its shape, furnished with a 

 notch, or more generally with a straight or recurved canal. Opercle horny. 



GENUS BUCCINUM. Adanson. 



Animal without any labial tooth. Middle portion of the tentacles dilated externally for the 

 eyes : foot short, rounded in front. Mantle furnished with a long canal in front of the 

 respiratory cavity, which latter contains two unequal series of gills : oviduct terminating 

 on the right, at the entrance of the branchial cavity. Male organ long, flattened, and on 

 the right side of the neck : vent on the right side in front. Shell ovate-conic : aperture 

 having a notch, without a canal in front ; pillar not flattened, somewhat twisted. Opercle 

 horny, oval, with concentric elements ; the summit marginal. 



BuCCINUM UNDATUM. 

 PLATE VII. FIG. 161. 



(STATE COLLECTION.) 



Buccinum undatum. Lin. Syst. Nat. p. 1204. Muller, Zool. Danica, p. 12, pi. 50. 

 B. id. Russet., Essex Journ. of Nat. Hist. Vol. 1, p. 69. 



B. id. Gould, Invertebrata of Massachusetts, p. 305. 



Description. Shell solid, ovate-oblong. Whorls six or seven, regularly convex, rapidly 

 terminating in an acute apex ; upper whorls with stout vertical broad plaits or folds, becoming 



