BEKENICEA. 107 



Peristomes slightly raised ; arranged regularly along slightly 

 curved lines. 



Formula. p, c, I, r=l, 0, 2, d\. 



DISTRIBUTION. 



ENGLAND : 



Cornbrash : Scarboro' . 

 Bradford Clay : Bradford ; Box. 



FOREIGN : 



Corallian Diceratian : Valfin, Haut-Jura. 

 Batlionian Braun Jura : Balin, Austria. 

 Bajocian Braun Jura, 5 : Dettingen ; Croixille, Calvados ; Moutiers and Gueret, 



Sarthe (fide D'Orbigny) ; Moselle (fide Terquem). 

 Zone of Harpoceras sowerbyi : Poramer, Franconia ; Gingen, "Wiir- 

 temberg ; Jungingen, Hobenzollern (fide Waagen). 



Description of Figure. PL Y. Fig. 3. Part of a zoarium 

 encrusting Oxytoma costata (Smith), x 16 dia. Bradford Clay: 

 Box, Wilts. Holl Coll. B. 4858. 



Affinities. This species was well figured by Michelin, and is 

 characterized by the regularly linear arrangement of the peri- 

 stomes. Its nearest Jurassic ally is B. archiaci, Haime, but it 

 differs from this by its lower peristomes, and by having these 

 regular and linear in arrangement instead of irregularly quincuncial. 



Etallon's description of B. corallina (non Sauv.) would give this 

 the same formula, except that the peristomes are described as 

 " saillantes." In the absence of figures one cannot see the extent 

 of this elevation, and thus the species cannot be definitely placed. 

 It is, however, probably a synonym of B. scolinula. 



The closest Cretaceous ally of this species is Berenicea papittosa 

 (Reuss), 1 in which the peristomes are raised twice or three times 

 as much as in the Jurassic form. This is not shown inD'Orbigny's 

 figure of B. oceanica, which he places in the text as a synonym of 

 B. papittosa -, it is probable that D'Orbigny's type specimen was 

 worn, as is suggested by the shape of the orifices. If it be not 

 so, I should be doubtful as to the correctness of including it as 

 a synonym of B. papillosa. 



The Cainozoic representative of this species is Berenicea minima 



1 Eeuss. Verst. bohm. Kreidef. p. 65, pi. xv. fig. 44. Syn. B. oceanica 

 (D'Orb.), op. cit. p. 867, pi. Dcxxxix. figs. 6, 7. 



