FAMILY TURBINIDE — SKENEA. 117 
V. lumbricalis? Lin. (Pu. 36, fig. 349 of this book.) Tubular: usually many interlaced together 
with numerous raised lines along its length; spire with 8 — 10 closely connected whorls. Color,’ 
ashen gray. Length, 8 -- 10 inches. 
The lumbricalis is reddish brown, and not more than four inches long. Northern Coast. 
GENUS SKENEA. Fleming. 
Shell minute, discoidal, concavely umbilicated beneath. Whorls three ; mouth expanded. 
SKENEA SERPULOIDES. 
PLATE XXXII. FIG. 303. 
Delphinula serpuloides, ADams, Bost. Jour. Vol. 3, p. 334. 
Skenea id. GouLp, Invertebrata of Mass, p. 247, fig. 189. 
Description. Shell very minute, diaphanous, smooth, not shining, slightly convex above 
and broadly concave beneath, forming a deep umbilicus which exhibits all the whorls. Whorls 
three: suture broad and deep. Aperture entire, free, turning downwards, circular, in con- 
tact with but not embracing any part of the preceding whorl: lip sharp, and receding so as 
to form an acute gape as it joins the preceding whorl. Opercle horny, multispiral ; the apex 
central. 
Color. Reddish brown or horn-color. 
Length, 0°03. Width, 0°07. 
One of the smallest of our marine shells, usually attachéd to stones about low-water mark. 
Common on the northern coast, and will probably be found on the shores of this State. 
(EXTRA-LIMITAL.) 
S.? laca. (Detpuinuta zd. Say, Jour. Ac. Sc. Vol. 5, p. 207; Am. Conchology, pl. 7.) Shell 
regularly spiral, subovate, nearly smooth. Whorls rounded, perfectly disjoined throughout, rapidly 
-lessening to the apex: a dilated groove on the line of the umbilicus; aperture oval, with a sharp 
edge. Color, whitish tinged with yellow. South-Carolina. 
An var. monst, Natice vel Valvate ? 
