708 
BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 
Genotype. — Plagioeeia (Diastopora) patina Lamarck, 18 1G. 
K ange . — J urassic-Recent. 
Fig. 232. — Genus Crisidia Milne-Edwards, 1838. 
A. Zoarium natural size of Crisidia ( Sertularia ) cornuta Ellis, 1755. 
B. Portion of a colony, X 36, of Crisidia ( Crisia ) franciscana Robertson, 1910, showing 
method of branching, and formation of ordinary and of ooecial internodes. The ordinary uni- 
serial internode consisting of a zooecium ( zoe ) giving origin to two other zooecia (hr). The 
(oe) the second member, the zooecium s 3 , a third member. Arising from a basal ramus ( ba. r. ) 
on the third zooecium is a fourth zooecium (V) , which serves to continue the branch upward. 
The prominent ooecium (oe) having a well developed tube ( oest . t.) at its summit, bent slightly 
backward. (After Robertson, 1910. 
C. Ovicell of Crisidia cornuta Ellis. (After Harmer, 1891.) 
D. Branch of Crisidia cornuta Ellis, 1755, X 36, showing uniserial arrangement of zooecia. 
(A-H after Hincks, 1880.) 
The other known species belonging to this genus are : 
Berenicea latomarginata D’Orbigny, 1852. Piocene-Recent. 
Diastopora lactea Jullien, 1884. Recent. 
Proboscina sarthacensis Pergens, 1890. Cenomanian. 
Mesenteripora compressa Goldfuss, 1827. Cretaceous. 
Reticulipota obliqua D’Orbigny, 1850. Cretaceous. 
Discosparsa clypeif ormis D’Orbigny, 1853. Turonian-Senonian. 
Entalophora ramosissima D’Orbigny, 1850. Cenomanian-Coniacian. 
Diastopora ecliinata Pocta, 1892. Cenomanian. 
Berenicea folium Novak, 1877. Cenomanian. 
Berenicea archiaci Haime, 1854. Jurassic. 
Berenicea diluviana Lamouroux, 1821. Bathonian. 
Diastopora michelini Blainville, 1830. Bajocian-Bathonian. 
Berenicea undulata Michelin, 1846. Bajocian-Bathonian. 
