197 



verse slit, and have a simple, semi-elliptical operculum, ending in a straight 

 proximal margin. The stem-internodes have a small depressed cryptocyst with 

 one pore at the bottom; and excepting the partitions of the stolon the other in- 

 dividual forms have their inner cavity divided into a series of segments (gener- 

 ally four), separated by more or less sharp constrictions. The distal walls have 

 a single-pored rosette-plate. Ooecm and avkularia wanting. 



Chlidonia Cordieri Aud. 

 Eucratea Cordieri Audouin, Descript de I'Egypte, Hist. Natur., Tome 1, 



explic. sommaire d. Planches pag. 242, Polypes PI. XIII, fig. Sj— 83. 

 Eucratea Cordieri Waters, Annals Nat. Hist., ser. 5, Vol. Ill, 1879, pag. 116, 



PI. XV, figs. 9, 10, 11. 

 Chlidonia Cordieri d'Orbigny, Paleontologie Francaise, Terrain cretaces, 



Bryozoaires, 1850 — 52, pag. 40. 

 Cothurnicella dsedala, Wyw. Thomson, Nat. Hist. Rev., Vol. V, pag. 146. 

 — — Wyw. Thomson, Dublin Univ., Zool. Bot. Assoc, 



1859, pag. 85. 

 Chlidonia Cordieri Busk, Challenger, Zoology, Vol. X, 1884, pag. 8, 



PI. XXVIII, fig. 11. 



— — Hincks, Annals Nat. Hist., ser. 5, Vol. XVII, pag. 258. 



— daedala Mc Coy, Zoologie of Victoria, dec. XI, pag. 35, 



PI. CVIII, fig. 2. 



— — Mc Gillivray, Catalogue of the Marine Polyzoa of Vic- 



toria, pag. 10. 

 Chlidonia Cordieri Waters, Journal Linnean Soc, Zoology, Vol. XXVI, 

 1896, pag. 18, PI. 1, fig. 8—9. 



— — Calvet, Bryozoaires Marins de la Region de Cette, 



pag. 13, PI. I, fig. 1 et 2. 

 (Pl. VIII, fig. Oa-Gy). 

 As our knowledge of this often examined species still leaves a great deal to 

 be desired, I may here give a connected description of it. It occurs as compound 

 colonies, a number of small colonies springing from a reticularly branched, fili- 

 form stolon (fig. 6 i), which may cover various substances. This stolonale net- 

 work is compo.sed of rather long partitions, separated two and two by a single- 

 pored rosette-plate (fig. 6 e), which is surrounded by a thickened, diaphragmatic, 

 projecting part of the inner wall. Each small colony (6 a, 6 b) is furnished with 

 a jointed stem, bearing two main branches likewise jointed, each of which termin- 

 ates in from 4 lu (3 long cylindrical internodes, F'rom each internode of the 



