ORDER POLYPI POLYPIFERI. 503 
CELLULARIA, L., 
Have cellules disposed so as to form branching stems in the 
manner of the sertulariz, but without any tube of communi- 
cation in the axis. Their substance besides, is more calca- 
reous. 
Lamouroux distinguishes among them the 
CRISIA, 
Whose cellules in two ranks, usually alternate, open on the 
same face. (Sertularia eburnea, Gm., &c.) 
ACAMARCHIS, 
Which, with the same disposition, have a vesicle at each 
aperture. (Sertularia neritina, Gm.) 
LORICULA, 
In which each articulation is composed of two cells, back to 
back, whose opposite orifices are towards the top, which is 
widened. (Sertularia loricata, Ell.) 
EUCRATIA, 
In which each articulation has but a single cellule, with an 
oblique aperture. (Sertwlaria chelata, Gm., &c.) 
We may approximate to them 
ELECTRA, Lamouroux, 
In which each articulation is composed of several cells, dis- 
posed like aring. (Flustra verticillata, Gm.) 
We should separate from them those which have cylindri- 
cal articulations, empty in the interior, and hollowed at all 
their surface with cellules, disposed like a quincunx. They 
conduct to the flustrz, and perhaps to the corallme. I name 
them SALICORNARIA, (Cellularia salicornia, Ellis, &c.) 
