130 NEW-YORK FAUNA — MOLLUSCA. 
C. terebrale. (In. Ib. Vol. 3, p. 320, pl. 3, fig. 7. Pu. 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. (Ip. Ib. Vol. 2, p. 287, pl. 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. pl. 49, fig. 1.) With distant longitudinal prominent ribs, with 
spiral strie, which give them a crenate appearance. Strie 5 on the body-whorl, 4 on the second, 
with smaller parallel striae: ribs 11 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 PURPURIDA. 
Animat furnished with a trunk, but not witha veil. Tentacles with the eyes on their middle 
portion, and external. Marine. Suewi 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. Mutter, Zool. Danica, p. 12, pl. 50. 
B. id. RussEL, Essex Journ. of Nat. Hist. Vol. 1, p. 69. 
B. id. Goutp, 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 
