30 



PROCEEDINGS OF THE NATIONAL. MUSEUM 



to lis impossible to identify otherwise the numerous specimens col- 

 lected in the same locality, Faringdon. 



In meridian section the zoarium appears to be formed by complete^ 

 superposed lamellae, with their basal lamella entire. The latter is 



quite visible on account of a 

 short zone of growth. The 

 zooecial walls are very thick 

 and formed of two or three 

 rows of small vesicles, which, 

 in tangential sections, are very 

 irregular. 



Affinities. — In the micromet- 

 lic dimensions, as well as in 

 sections, our specimens are 

 very close to Reptomulticava 

 ,, „ , „. f -r ■ n r. ,ono micropora Koemer, 1839, but 



Fig. \b.— Reptomulticava fungiformts Gregorj', 1U09. -t _ _ ' _ ' 



Meridian section, X IC, showing superposed cellular they differ in the ZOarial form 



lamellae, and the thick walls with large vesicles. ^^^ -^ ^^^ arrangement of the 



Lower Cretaceous (Aptian): Faringdon, England _ _ o 



apertures in quincunx. 

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

 (common). 

 Plesioty pes. —C'dt. No. 69873, U.S.N.M. 



REPTOMULTICAVA BELLLLA De Loriol, 1869 



Plate 24, figs. 18-20 



1869. Reptomulticava bellula De Loriol and Gillieron, Monographie paleon- 

 tologique et stratigraphique de I'etage Urgonien inferieur de Landeron. 

 (Neuchatel), Memoires de la Soei6t6 helvetique des Sciences naturelles> 

 vol. 23, p. 41; pi. 3, figs. 9-11. 



We refer to this species the unique specimen which we have figured, 

 but the micrometric dimensions seem to us a great deal smaller, and 

 there are 25 apertures to the square millimeter in place of 15, as 

 indicated by Gregory. 



Occurrence. — Lower Cretaceous (Valangian) : Sainte-Croix (Vaud), 

 Switzerland (very rare). 



Genus DEFRANCIOPORA Hamm, 1881 



DEFRANCIOPORA NEOCOMIENSIS, new species 



Plate 25, figs. 13-15 



Description. — The zoarium is free, claviform, composed apparently 

 of many discoidal superposed subcolonies. The base is narrower 

 than the zoarium. The tubes are little thickened ; the apertures are 

 polygonal and close together. 



Measurements. — Diameter of aperture, 0.14 mm.; maximum zoarial 

 width, 7 mm.; maximum zoarial height, 10 mm. 



