ART. 2] CYCLOSTOMATOUS BRYOZOA CANU AND BASSLEB 5 



Order CYCLOSTOMATA Busk 



Division INOVICELLATA 



Family DIASTOPORIDAE Gregory, 1899 



Forma STOMATOPORA Bronn, 1825 



STOMATOPORA CALYPSO D'Orbigny, 1850 



Plate 26, fig. 11 



1899. Stomatopora calypso Gregory, Catalogue of the Cretaceous Bryozoa in the 

 British Museum, vol. 1, p. 19, pi. 1, figs. 8, 9. (Bibliography, geologi- 

 cal distribution.) 



Our specimen approaches, in its small oral dimensions, Figure 9 of 

 Gregory, 1899, which represents a specimen from the Albian of Hun- 

 stanton. Here the aperture measures only 0.10 mm. in diameter. 



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



Plesiotype.-— Cat. No. 69829, U.S.N.M. 



STOMATOPORA FILIFORMIS De Loriol, 1863 



1863. Stomatopora filiformis De Loriol, Les invert^br^s du Neocomien inf^rieur 

 du Mont Saleve, p. 132, pi. 16, figs. 6, 7. 



Measurements. — Diameter of orifice, 0.08 by 0.10 mm. (0.07- 

 0.10 mm.); diameter of peristome, 0.12 mm.; diameter of zooecium, 

 0.14 mm. (0.15-0.17 mm.); length of zooecium, 0.56-0.60 mm. (0.50- 

 0.70 mm.). The Sainte Croix specimens are mediocre, and we have 

 based our determination on a good specimen from the Canu collec- 

 tion, in which the orifice is elliptical. The measurements in paren- 

 theses are the extremes shown on specimens from the Geneva Museum 

 determined by De Loriol. 



Occurrence. — Lower Cretaceous: Mont Saleve, near Geneva (Haut- 

 ervian) and Sainte Croix (Valangian), Switzerland. 



Cat. No. 69830, U.S.N.M. 



STOMATOPORA GRANULATA, var. NEOCOMIENSIS, new yarlely 



1838. Alecio grnnulata Milne Edwards, M(5moire sur les Crisics, Anuales 



Sciences naturelles, vol. 9, p. 205, pi. 16, fig. 3. 

 1853. Stomatopora granulata D'Orbigny, Pal6ontologie frangaise, Terrain Cr6- 



tac6, vol. 5, p. 836, pi. 628, figs. 5-8. 

 1868. Stomatopora granulata De Loriol, Monographic des couches de etage 



Valangien d'Arzier (Vaud), Pal6ontologie Suisse, ser. 4, pi. 5, fig. 12. 



Gregory, 1899 (p. 3), published a long synonomy of this species, 

 in which the geological occurrence is also equally great. This does 

 not seem to us perfectly exact and we prefer to form a special vari- 

 ety for the Lower Cretaceous specimens corresponding to the figures 

 of Milne Edwards and of D'Orbigny. 



Measurements. — Diameter of orifice, 0.10 mm.; diameter of zooe- 

 cium, 0.30 mm.; length of zooecium, 0.70 mm. 



