27 
backwards and open at their extremity. Rather a 
large lateral aperture. Several articulated ciliated 
cirrhi ; testaceous valves very small, five, separate, 
two semilunate at the sides of the aperture, one ex- 
ceedingly minute dorsal and others equally minute 
terminal. 
O. Buarnvinii1. Leach.—Lam 2.—An O. Cuvier 
Reeve. t. 16.?—Lepas Cornuta. Lin. T. M1. é. 12. 
f. 1.—Turt. D. p. 73.—Stalk longer than the body, 
enlarging towards the base ; white regularly marked or 
clouded with three purplish brown broken longitudinal 
lines on each side, which partially extend down the stalk. 
Length, 2. of tubular protuberances, % On wood 
Srom wrecks, Devon, Poole. 
Crass CONCHIFERA. 
Shell, with two valves, sometimes but rarely furnished 
with differently shaped accessorial ones. 
OrpER DYMYARIA. 
With at least two internal muscular scars. 
Famity TUBICOLARIA, Lam. 
Enclosed in or attached to a shelly tube. 
Genus TEREDO, Lin. 
Valves equal, largely open above and below, placed at 
the larger extremity of a tube open at both ends. 
B 2, 
