ABT.22. CYCLOSTOMATOUS BRYOZOA — CANU AND BASSLER. 39 



ularity. The extremity of the zooecial walls is strongly dilated like 

 a club in the genus Cea. We are not certain of the presence of 

 an oral tongue. 



Occurrence. — Cretaceous (Coniacian) : Villedieu (Loir-et-Cher), 

 France. 



Plesiotypes.—Ci\i. No. 60404, U.S.N.M. 



STATHMEPORA, new genus. 



This genus is characterized by the arrangement of the peristomes 

 into linear fascicles and by an ovicell formed somewhat before the 

 consolidation of the fascicles. The peristomies of the fascicles cease 

 therefore to be adjacent in the ovicelled portion of the zoarium; 

 they are isolated since they are consolidated at the same time as 

 the ovicell. The oeciopore is a very minute perforation placed near 

 the first tube of a linear fascicle. 



Genotype. — Stathmepora faheUata'' new species from the Pleis- 

 tocene of California. 



In Flagioecia the tubes are never grouped into linear fascicles. 

 Generally the ovicell has been consolidated before the peristomes 

 which brings about the abortion of a certain number of tubes. Still 

 sometimes the peristomes have been consolidated before the ovicell 

 and thus brings about their abortion. This phenomenon is readily 

 observed in Plagioecia (Berenicea) diluviana Lamouroux, 1821, of 

 which Canu, 1900, has given several ovicell variations. 



Bisidmonea johmtrupi Pergens, 1886, and Bisidmoma gabhiana 

 Ulricli and Bassler, 1907, belong to this new genus whose geologic 

 range dates from the Danian. 



The zoarium of Stathmepora ftahellata., new species, from the 

 Pleistocene at Santa Monica, California, lias the zoarial form of 

 M esenteripara. 



The ovicell of Bisidmonea antiqua D'Orbigny, 1852, the genotype 

 of Bisidmonea proves to be of the type characterizing the Mecynoe- 

 ciidae, in which family we have placed this genus. 



STATHMEPORA GABBIANA Ulrich and Bassler, 1907. 



Plate 7, figs. 4, 5. 



1907. Bisidmonea gahhiana Ulrich and Bassler, Bryozoa, Cretaceous 

 Paleontology ol' New Jersey, Geolojrical SuTvey of New Jersey, Paleon- 

 tology, vol. 4, p. 320, pi. 22, figs. 1, 2. 

 The authors of this species have figured the ovicell, but they did 

 not describe it. We are reproducing the types with a greater mag- 

 nification. 



5 Described and Illustrated in our monograph on the Later Tertiary and Quaternary 

 Bryozoa of North America, now in press. 



20107— 22— Proc. N. M. vol. 61 34 



