BRYOZOANS. 



8i 



corals of the ChcXtetes family were possibly, like the Mille- 

 pores, Acaleph corals, as suggested by Agassiz. Others 

 have suggested, with perhaps better reason, that they were 

 Bryozoan. 



III. BRYOZOANS. 



The Bryozoans are very small animals, and look much like 

 Hydroids. Although belonging to the sub-kingdom of Mol- 

 lusks, they are externally polyp-like, having a circle or ellipse 

 of slender tentacles around the mouth. But, in internal 

 structure, and all of the animal below the head, they are 

 MoUusks. They form delicate corals, membranous or cal- 

 careous, made up of minute, cabin-like cells, which are either 

 very thin crusts on sea-weeds, rocks, or other supports, or 



2, HOKNERA LICHENOlUfCS ; 3, UlSCOPORA SKENEI ; SmITT. 



slender moss-like tufts, or graceful groups of thin, curving 

 plates, or net-like fronds ; and sometimes thread-like lines, or 

 open reticulations. 



G 



