ORDER POLYPI POLYPIFERI. 501 
Our coasts produce one, Tub. indivisa, Lam. Ellis. Corall. 
Xvi. c., with simple tubes, two or three inches high. Similar 
to blade of straw. 
TIBIANA, Lamour., 
Have zig-zag tubes, which give out from each angle, a small 
open branch. (Tibiana fasciculata, Lam.) 
CoRNULARIA, Lam., 
Have small conical tubes, from each of which issues a polypus, 
with eight denticulated arms, like those of the alcyones, gor- 
gones, &c. (Tubularia cornucopia.) 
ANGUINARIA, Lam., 
Have small cylindrical tubes, adhering to a creeping stem, 
each of which is opened laterally near its extremity, for the 
passage of a polypus. (Sertularia anguina, Ellis.) 
CAMPANULARIA, Lam., 
Have the ends of the branches through which the polypi pass, 
expanded into the form of bells. 
Lamouroux distinguishes them into CLyTIA, which have 
climbing stems. (Sertularia verticillata, Ellis, &c.) 
And into LAOMEDEA, which have not climbing stems, and 
in which the bells are smaller, and with shorter branches. 
(Sert. dichotoma, Gm., &c.) 
SERTULARIA, L., 
Have a corneous stem, sometimes simple, sometimes branched, 
and in its sides some cells of very various forms, occupied by 
polypi, all attached to a gelatinous stem, which traverses the 
axis after the manner of the pith of a tree. These zoophytes 
have the appearance of little plants, equally delicate and 
