64 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol. (Jl. 



dorsal. It differs from Osculipora D'Orbigny, 1849, in its tubes 

 without peristome and in the presence of pinnules and not of fas- 

 cicles. 



The zoarium is more or less bushy; the dorsal is exterior, the 

 frontal which is smooth is interior ; the apertures are open from the 

 exterior side, that is to say, from the side of the dorsal with nema- 

 topores. In this arrangement the zoarium is not a trap for diatoms 

 and its architecture appears to be hydrostatic. 



TRUNCATULA FILIX Hagcnow, 1851. 



Plate 25, figs. 6, 7. 



1851. Trunmtula filix Hagenow, Die Bryozoeu der Maastrichter Krelde- 

 bildung, p. 35, pi. 3, fig. 4. 



1909. Osculipora filix Gregory, Catalogue Fossil Bryozoa in British Mu- 

 seum, Cretaceous, vol. 2, p. 64, figs. 24, 25. 



The zoarium of. this species is quite simple, consisting of a stem 

 rising from a sole-like base. A strong smooth midrib occurs on the 

 celluliferous side. The ovic ell has been figured by Gregory, whose 

 figures we copy here. 



Occu)Te7ice. — Cretaceous (Maastrichtrian) : Maastricht, Holland. 



TRUNCATULA PINNATA Roemer, 1840. 



Plate 25, figs. 1, 2. 



1840. IdmGuca pinnata Roemer, Die versteinerungen des norddeutschen 



Kreidegebirges, p. 20, pi. 5, fig. 22. 

 1846. Idmonea pinnata Miciielin, Iconographie zoophytologie, p. 203, pi. 



52, fig. 9. 



1846. Idmonea aculeata Miciielin, Iconographie zoophytologie, p. 203, pi. 



53, fig. 10. 



1854. Truncatula aculeata d'Orbigny, Paleontologie frangaise, Terrain 

 Cretace, vol. 5, p. 1054, pi. 796, fig. 1-5. 



1871. Truncatula pinnata Simonowitch, Beitrage zur Kenntniss der Bryo- 

 zoen des Essener Griiusandes, Verhandlungen des Naturhistorischen 

 vereins der preussischen Rhinlande und Westphalens, vol. 28 (ser. 

 3. vol.8), p. 58. pi. 4, fig. 1. 



1872. Truncatula aculeata Reus?;, Die Bryozoen und Foraminiferen des 

 unteren Planers, Paleontograi)hica, vol. 20, pp. 98, 122, pi. 30, fig. 4. 



1909. Homoeosolen pinnatus Gregory, Catalogue of Fossil Bryozoa in 

 British Museum, Cretaceous, p. 69. (Bibliography.) 



Affinities. — The ovicells are often larger than those figured by 

 Simonowitsch and L'Orbigny; even their place is irregular as is 

 indicated in our figured specimens. 



The species differs from Truncatula suhpiyinata D'Orbigny, 1854, 

 in its nematopores never closed, more numerous, smaller, and in 

 which the orifice is quite oblique on the zoarial axis, and in its zoarial 



