SYSTEMATIC DESCRIPTION. 
Group BRYOZOA, Ehrenberg, 1831. 
Class ECTOPEOCTA, Nitsche. 
Subclass GYMNOL^MATA, Allman. 
Order CYCLOSTOMATA, Busk.' 
Suborder TDBXJLATA, Gregory. 
Family CllISIID^. 
Diagnosis. 
Cyclostomata Tiibulata with simple zooeoia which grow into 
a dendroid articulated zoarium, attached by radical tubes. 
The zooecia are uniserial or biserial, and the branches are 
divided into calcareous segments separated by chitinous joints. 
The ovicells or gonoecia are piriform, or irregularly piriform. 
CRISIA, Lamouroux, 1816 . 
[Illst. Polyp. Corall. flex. p. 136.] 
Synonyms. 
Sertularia, pars, Liunicus, 1758; Esper, 1788, etc. 
Cellularia, pars, Pallas, 1766; Bruguiere, 1789, etc. 
Cellaria, pars, Ellis & Solander, 1786 ; Lamarck, 1816 ; de Blaiuville, 1834. 
Crisia, pars, Lamouroux, 1816, 1821; Fleming, 1828; de Blainville, 1834; 
Milne-Edwards, 1838; Johnston, 1838; d’Orbigny, 1854; Smitt, 1864; 
Busk, 1875 ; Macgillivray, 1880 ; Norman, 1869; Harmer, 1891, etc. 
Falearia, pars , Oken, 1815-16; de Blainville, 1834. 
Eucratea, pars. Hammer, in Lamouroux, 1821 ; Fleming, 1828; Esper, 1829. 
Unicellaria, de Blainville, 1834. 
Crisidia, Johnston, 1847; Sars, 1853; d’Orbigny, 1853 ; Heller, 1867; 
Busk, 1875. 
Filicrisia, d’Orbigny, 1853. 
^ G. Busk & M. J. Macgillivray: “Narrative of the Voyage of H.M.S. 
‘Rattlesnake,’” 1852, vol. i., App. p. 346. “The first suborder, having 
a round simple opening to the cell, is here termed the Cyclostomata.” 
B 
