SERPULA. CREEPER. 
155 
15. Serpula Arundo. Reed Creeper. 
Shell opake, yellowish-white, cylindrical but very gra¬ 
dually,tapering to a point, finely striate circularly, fixed 
it the smalls end only for the space of about half an inch, 
1 a-3 projecting forwards in a more or less straight or undu¬ 
lating manner, sometimes hut seldom a little curved or 
{listed : length often seven or eight inches $ breadth at 
the larger end hardly a quarter of an inch. 
This reed-like species, so different in its solitary and pe¬ 
culiar manner of growth, being fixed at the very extremity 
taly, and probably stretching out in an horizontal direc¬ 
tion, is not uncommonly dredged up on the Devonshire 
wist, and is perhaps an inhabitant of quiet waters, shel¬ 
tered by rocks and subject to little agitation, whence it 
! mar be occasionally broken or torn olf. The point by which 
it is fixed is strongly marked by the surface being flattened 
oa the side. v. v. 
C. Detached', and curved or twisted, 16 to 20. 
16. Serpula Seminulum. Grain-like Creeper. 
Walker, f. 1— Dorset Cat. pi. 19. f. 31. 
Serpula ovalis. Linn. Trans, v. pi. 1. f. 28 to 30. 
Shell glossy white or with a ferruginous tinge, opake. 
Sat, oval, composed of three and rarely four compartments ; 
the interior one varying much in size and shape, generally 
oral, sometimes linear, or more or less inclining to orbicu- 
brj the outer ones defined by a depressed line, and trans¬ 
versely wrinkled: aperture compressed, half-moon shaped: 
IOmeter the tenth of an inch, 
in fine sand. v. v. 
1". Serpula subrotunda. Roundish Creeper. 
Walker, f. 4. 
Shell glossy white, opake, rather flat, nearly orbicular, 
tith three compartments; the middle one raised above the 
ethers on the upper side, flat on the under side : aperture 
inull, angular, edged with yellow when fresh : diameter 
the tenth of an inch. 
In fine sand. v.v. 
18. Serpula oblonga. Oblong Creeper, 
Montagu, pi. 14. f. 9. 
