AKT. 22. CYCLOSTOMATOUS BRYOZOA CANU AND BASSLER. 81 



stone and in its ovicell, which is lobed and not reguhxrly elliptical. It 

 differs from the Diaperoeciidae in which the oeciostome is also cen- 

 tral, in the presence of lateral lobes to the ovicell and the closing of 

 the subjacent tubes. But a single genus is known, namely, Lo- 



hosoecia. 



LOBOSOECIA, new genus. 



Greek : lohos, lobe ; in allusion to the form of the ovicell. 



The ovicell is lobed. The tubes are without peristome, widened, 

 oriented, long, with dorsal gemmation; the walls are very thick at 

 the extremity ; the zooecial area is hexagonal ; the aperture is round. 



Genotype. — Lohosoeoia seviiclausa Michelin, 1846. Cretaceous. 



LOBOSOECIA SEMICLAUSA Michelin. 1846. 



Plate 12, figs. 4-11. 



1846. Meliceritites scniiclaiisa Michelin, Icoiiograpbie zoophytologique, p. 



211, pi. 53, fig. 3. 

 1899. Meliceritites semiclausa Gregory, Catalogue fossil bryozoa in the 



British Museum, Cretaceous, p. 328, pi. 14, figs. 1, 2, 3 (not fig. 29) 



(not synonymy). 



Structure. — The aperture is orbicular. This is the principal char- 

 acter of this species which has been well figured by Michelin and 

 by Gregory, although the bibliography of the latter author is in- 

 correct. D'Orbigny appears to be the initial author of the con- 

 fusion. 



The zooecial area is rhomboidal or hexagonal with a tuberosity 

 at the angles. The transverse section shows the tubes increasing in 

 size towards the periphery and an external, very thick zoarial wall. 

 The longitudinal section exhibits the habitual tubes observed in 

 species having a zooecial area. They are regularly widened, with 

 dorsal gemmation, and the walls are very thick at their extremity. 



The ovicell surmounts a number of zooecia, the apertures of which 

 are thus closed. The lobes extend between the peripheral apertures. 

 The oeciostome is thick, funnel shaped, transverse, with a sort of 

 proximal lip. The oeciopore is twice as large as the apertures and 

 its form is that of a crescent. 



Occurrence. — Cretaceous (Cenomanian) : Le Mans (Sarthe), 

 France, and Warminster, England (Gregory). 



Family ELEIDAE D'Orbigny, 1852. 



Bibiograpliy imorpholofjical) . — 1852. d'Orbigny, PalSontologie frangaise, 

 Terrain Cretac^, p. 1585. — 1899. Gregory, Catalogue of the Cretaceous 

 Bryozoa in the British Museum, vol. 1, p. 285.— 1912. Levinsen, Studies 

 on the Cyclostomata operculata, Memoires de TAcaderaie Royal des 

 Sciences et des Lettres de Danemark, vol. 10, p. 19. 



The ovicell is a large, pyriform, globular sack, with well-defined 

 outlines. It is formed on the completely consolidated distal tubes. 



