BRYOZOA OF THE PHILIPPINE REGION 



525 



Genus FILICRISIA D'Orbigny, 1852 



The sterile segments consist of 1-3 zoids; the fertile segments are 

 composed of 3-5 zoids; the gonozoid is adnate; its tube is terminal; 

 the membranous sac in the gonozoid is probably constricted off into 

 two parts; 8 tentacles. 



Genotype. — Filicrisia (Crisidia) geniculata Milne Edwards, 1838. 



Genus CRISIELLA Borg, 1924 



The sterile segments, except in the basal parts of the colonies, con- 

 sist of 3-7 zoids; the fertile segments are composed of many, often 



Fig. 216. — Genus Crisidia Milne Edwards, 1838 



A-F. Crisidia cornuta Linnaeus 1758 (Ellis 1755). A. Articulated branches 

 showing the gemmation and the method of ramification, X15. B. Portion of 

 ovicelled colony, X48. (A, B. After Milne Edwards, 1838.) C. An ovicell 

 viewed from the front. (After Harmcr, 1S91.) D. An ovicell seen in profile. 

 E. Portion of nonovicelled colony, X26. F. Colony, natural size. (D-F. 

 After Hincks, 1880.) 



more than 20 zoids, divided without joints in a varying number of 

 partial segments that surround the gonozoid; this together with the 

 surrounding partial segments is more or less twisted round its axis; 

 the membranous sac of the gonozoid is not constricted off into two 

 parts; 8 tentacles. (Borg, 1924.) 



Genotype. — Crisiella (Crisia) producta Smitt, 1866. Recent. 



Genus CRISIA Lamouroux, 1812 



The sterile segments, except in the basal part of the colonies, consist 

 of 3 to many zoids; the fertile segments are composed of 5 to many 



