BERENICES. 101 



14. Berenicea exilis (Reuss), 1867. 



SYNONYMY : 

 Berenicea exilis, Eeuss, 1867, Bry. braun. Jura Balin : Denk. k. Akad. Wiss. 



Witn. Bd. xxvii. p. 8, pi. ii. fig. 3. 

 ,, Gregory, 1896, Rev. pt. iii. : Ann. Mag. Nat. Hist. ser. 6, 



vol. xvii. p. 48. 

 Diastopora cricopora, Vine, 1881, Further Notes on Diastoporidse : Quart. Journ. 



Geol. Soc. vol. xxxvii. p. 387, pi. xix. figs. 18-25. 

 ,, ,, Vine, 1883, 3rd Rep. Foss. Polyz. : Rep. Brit. Assoc. 1882, 



p. 264. 



,, Vine, 1884, 4th Rep. Foss. Polyz. : ibid. 1883, p. 187. 



. ,, ,, Vine, 1887, Jur. Polyz. JSTorthptn. : Journ. Northptn. Nat. 



Hist. Field Club, vol. iv. p. 206, pi. i. figs. 9-11. 



DIAGNOSIS : 



Zoarium thin, irregular sheets. 



Zocecia crowded, and visible only at the ends. 



Peristomes well raised ; irregularly distributed. Those of 

 adjoining, parallel zooecia distant from one another from two 

 to three times their diameter. 



Gonocysts small, round, hemispherical; equal in width to two 

 or three zooecia. 



Formula. p t c, I, r=2, 0, 1, 1. 



DISTRIBUTION. 



ENGLAND : 



Cornbrash : Thrapston ; Chippenham. 



Great Oolite : Hampton Common, near Bath. 



Inferior Oolite : Bridport ; Cleeve Hill, near Leckhampton. 

 FOREIGN : 



Bathonian Braun Jura : Balin ; Ranville. 



Description of Figure. PI. VI. Fig. 1. Part of a zoarium with 

 gonocysts, X 1 8 dia. Inferior Oolite : near Leckhampton. Brodie 

 Coll. D. 2217. 



Affinities. This species most resembles B. coartata, which it 

 resembles both in the shape of the zoarium and the characters 

 of the zocecia. The peristomes are, however, much less crowded, 

 as well as being irregularly arranged. In the latter character it 

 resembles B. verrucosa (M. Edw.), but it differs from this by 

 having shorter zooecia, and an irregular instead of a discoid 



