288 POLYZOA INFUNDIBULATA. 



the back. With a good magnifier the walls of the cells are seen to 

 be specked with a few granules or disks. The long bristles are 

 sometimes jointed. 



2. 0. SETACEA, " cells long^ tuhulous, with curved terminations 

 turned alternately in opposite directions ; a long bristle heloio 

 the aperture of each cell^ R. Q. Couch. 



Crisia setacea, Coiuih in Zoologist, ii. 1096 ; and in Corn. Faun. iii. 98, pi. 17, fig. 

 sin. under the Crisia cornuta. 



Hah. Shores of Devon and Cornwall, Couch. 



" This is also a calcareous and confervoid species, but is more 

 slender and grows to a greater height than the last, though I have 

 found them much alike in these particulars. It is sparingly and 

 dichotomously branched. Compared with the last species, it pre- 

 sents a well-marked contrast in having the bent necks of the cells 

 turned in opposite directions, and the bristle is situated helow 

 instead of above the orifice. From the aperture of the cells being 

 turned in opposite directions, the cells themselves might be said to 

 be arranged in a biserial manner. This cannot, however, be consi- 

 dered as strictly the case, since they are inserted into each other at 

 their terminations, and not by their sides." R. Q. Couch. 



II. CELLEPORINA. 



FAMILY— EUCRATIAD^. 



Character. — Polypidoms calcareous., confervoid., multiform^ 

 the cells elongate., enlarged upwards or clavate., with an oblique 

 subterminal aperture the rim of which is alicays plain : no ex- 

 ternal ovarian capsules. 



8. Eucratea,"' Lamouroux. 



Character. — Polypidom confervoid., jointed., subcalcareous, 

 the branches consisting of a single row of bent cells., the orifices 

 of which are on one aspect., oblique, subterminal or rather 

 lateral. 



1. E. CHELATA, cells hi the form of a horn ; the aperture 

 oblique, marginated, with a spinous process beneath the rim. 

 Ellis. 



* From Eucrate, one of the Nereids, mentioned by Hesiod, Theogony, v. 243. 



