64 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 67 



Family ELEIDAE D'Orbigny, 1852 



Genus MELICERITITES Roemer, 1840 



MELICERITITES HAIMEANA D'Orbigny, 1853 



Plate 13, figs. 18-20 



1853. Entalophora haimeana D'Orbigny, Pal^ontologie frangaise, Terrain Cretac^, 



vol. 5, pi. 617, figs. 11-14. 

 1853. Mellceritites haimeana D'Orbigny, Pal^ontologie frangaise, Terrain Cretac6> 



vol. 5, p. 618. 

 1889. Meliceritites haivieana Pergens, Revision des Bryozoaires du Cr^tac^ figures 



par D'Orbigny, Memoires Soci6t6 Be]g6 de Geologic, etc., vol. 3, p. 399. 



Pergens, 1889, notes that the specimens in the Museum of Paris 

 seem worn. This is in effect the habitual aspect of this species and 

 such specimens are in reality normal. Those which we have found at 

 Faringdon correspond very well with D'Orbigny's figure and descrip- 

 tion. The facettes are separated by furrows and not by salient 

 tlireads. Certain specimens seem to be multilamellar. 



Measurements. — 



Aperture|^-0-06 ^^-JFacettesF-O-^O --' 

 ^ lla = 0.08mm. J llf = 0.16 mm. 



Diameter of branches, 1.20 mm. 



Occurrence. — Lower Cretaceous. Albian, Grandpre (Ardennes), 



France; Aptian, Faringdon, England (very common). 



Plesioty pes. —Cat. No. 69915, U.S.N.M." 



MELICERITITES TRANSVERSA, new species 



Plate 12. figs. 1-12 



Description. — The zoarium is free, cylindrical, ramified, borne on a 

 little expanded base, formed of many superposed lamellae. On the 

 centra] zoarium the peristomes are salient, adjacent laterally, and 

 arranged in close transverse rows; the facettes are quite short and 

 separated by very short threads. The aperture is triangular, some- 

 what transverse. The ovicell is very short, transverse, occupying all 

 the zoarial width, quite convex, smooth; the oeciostome is a little 

 salient tube. On the exterior lamellae the peristomes are arranged 

 in quincunx; on the basal lamella they are little salient and almost 

 orbicular. 



Measurements. — 



Aperture{^-0-«8 ^^]F.cettes\^J = '/^'-'-^' ^• 

 ^ lla=0.10mm.l llf=0.16mm. 



Diameter of zoaria at the extremity, 1.5 mm.; diameter of zoaria 

 at the base, 2.1 mm.; length of ovicell, 0.64 mm. 



Variations. — When the peristomes are very salient the facettes are 

 little visible (figs. 2, 3). On the same branch the peristomes may 



