CYCLOSTOMATOUS BRYOZOA CANU AND BASSLER 



65 



be salient or not (fig. 4), in transverse regular rows (fig. 4), irregular 

 (fig. 5), or oblique (fig. 6). On the exterior lamellae the peri- 

 stomes are arranged in quincunx (figs. 7, 8). The facettes are 

 visible only on the specimens 

 with little salient peristomes 

 (figs. 4, 7). On the basal lamel- 

 lae the peristomes are little sali- 

 ent and almost orbicular (fig. 

 10). The incrusting exterior 

 lamellae are enveloping subcolo- 

 nies of reenforcement. 



The longitudinal section 

 shows a central bundle of very 

 long cylindrical tubes emitting 

 laterally by dorsal gemmation, 

 short tubes narrowed at the base 

 but much expanded in their re- 

 curved terminal part. 



In transverse section the cen- 

 tral bundle is formed by several 

 large tubes around which are 

 smaller tubes representing the 

 base of the tubes with facettes. 



The opercula are very rare. 

 We have observed some cases of 

 regeneration. 



Affinities. — This species re- 

 sembles greatly Meliceritites for- 

 icula D'Orbigny, 1853, of the 

 French Turonian. It differs in 

 the transverse aperture and in 

 the transverse and not elongated 

 ovicell. 



Occurrence. — Lower Creta- 

 ceous (Aptian) : Faringdon, Eng- 

 land (very common) . 



Cotypes.—Csit. No. 6 9916, 

 U.S.N.M. 



Fig. 33. — Meliceritites transversa, new species 

 A. Transverse section, X 16, made between the 

 orifices. The peristomes were in transverse some- 

 what oblique rows which causes the helicoidal 

 arrangement of the peripheral tubes. B. Trans- 

 verse section, X 16, cutting some orifices. C. Lon- 

 gitudinal section, X 16. The clear tubes are cut 

 along the median axis while the shaded ones are 

 cut tangentially to their walls, this arrangement 

 resulting from the disposition of the peristomes in 

 transverse rows. At the center is a long tube which 

 may branch. Lower Cretaceous (Aptian): Faring- 

 don, England 



MELICERITITES CUNNINGTONI Gregory, 1899 



Plate 13, figs. 1-8 

 1899. Nodelea cunningtoni Gregory, Catalogue of Cretaccou-s Bryozoa in the 

 British Museum, vol. 1, p. 308, figs. 35, 36. 



Variations. — Gregory, 1899, gave an incomplete description of this 

 species. The orifices are transverse; the peristomes are thin, adja- 



