ABT.22. CYCLOSTOMATOUS BRYOZOA — CANU AND BASSLER. 9 



Occurrence. — Jurassic (Bathonian) : Eanville, etc. (Calvados) 

 and Occaignes (Ome), France. 



Plesiotypes.—Qdii. No. 68900, U.S.N.M. 



Fig. 2. — Macroecia lamellosa Michelin, 1846. 



A. Transverse thin section, X 16, of a thick, much calcified frond. The two 

 basal lamellae are united together to form a unique median lamella. 



B. Longitudinal section, X 16, illustrating that the two lamellae are not 

 symmetrically placed. 



C. A longitudinal section, X 16, showing that all the zoaria of a lamella are 

 not oriented alike. 



Jurassic (Bathonian) : Ilanville (Calvados), France. 



ATRACTOSOECIA, new genus. 



Qve^^: Atractos^ spindle, in allusion to the form of the ovicell. 



The ovicell is a very long fusiform sack ; the oeciostome is terminal, 

 elliptical, transverse, larger than the other peristomes. The tubes are 

 cylindrical. 



