CYCLOSTOMATOUS BRYOZOA CANU AND BASSLKB 



83 



REPTOCLAUSA NEOCOMIENSIS D'Orbigny, 1853 



1853. Reptoclausa neocomiensis D' Orbigny, Paldontologie frangaise, Terrain 



Cr4tac6, vol. 5, p. 888, pi. 765, figs. 1, 2. 

 1899. Idmonea neocomiensis Gregory, Catalogue of the Cretaceous Bryozoa in 



the British Museum, vol. 1, p. 155. (Bibliography.) 



This species is well characterized by its short fascicles arranged in 

 quincunx. 



Occurrence. — Lower Cretaceous (Valangian) : Sainte-Croix and 

 Mont Saleve, Switzerland, and Villers-le-Lac (Doubs), France. 



Family TRETOCYCLOECIIDAE Canu, 1919 



Genus TRETOCYCLOECIA Canu, 1919 



TRETOCYCLOECIA (?) MULTIPOROSA, new species 



Plate 16, figs. 5-8 



Description. — The zoarium is small, cylindrical, bifurcated. The 

 orifice is orbicular; the peristomes are thin, salient, arranged in 

 quincunx, scattered or in annular 

 rows. The meso pores are large, 

 numerous, polygonal, irregularly 

 placed around the orifices. The ovi- 

 cell is orbicular. 



Measurements. — Diameter of aper- 

 ture, 0.08 mm.; diameter of peri- 

 stome, 0.10 mm.; diameter of zoar- 

 ium, 1.25 mm.; diameter of meso- 

 pores, 0.10 mm. 



Ajjinities. — The mesopores seem 

 to be parietal. Their exterior dia- 

 meter is perceptibly equal to that 



of the peristomes."^ The Ovicells fig. 42.- irriocz^doeda <?6«sa, new species. A, 

 p -. , B- Longitudinal sections, X 16. The meso- 



found were broken and difficult to 

 interpret. The tubes are cylindrical. 



The species differs from Tretocycloecia densa by its very numerous 

 mesopores as large as the peristomes. 



Occurrence. — Lower Cretaceous (Aptian) : Faringdon, England 

 (rare) . 



Coty pes. —Csit. No. 69939, U.S.N.M. 



TRETOCYCLOECIA DENSA, new species 



Plate 16, figs. 9-14 



Description. — The zoarium is free, small, cylindrical, bifurcated. 

 The orifices are orbicular; the peristomes are thm, salient, close 

 together, sometimes adjacent, arranged in quincunx. The mesopores 

 are little numerous, small, irregularly distributed around the aper- 



pores are almost closed by thick tissue. Lower 

 Cretaceous (Aptian): Faringdon, England 



