BERENICEA. 95 



11. Berenicea parvitubulata, Gregory, 1896. 



SYNONYMY : 



Lerenicea parvitubulata, Gregory, 1896, Rev. pt. iii. : Ann, Mag. Nat. Hist. 

 ser. 6, vol. xvii. p. 45. 



DIAGNOSIS : 



Zoarium thin, irregular sheets ; much lobed when large. 



Zocecia very narrow, cylindrical, of medium length. Central 

 zooaeia flabellate, and visible throughout their length ; peripheral 

 ones more crowded, and visible only in part. Surface plain. 



Peristomes small, slightly raised; from one-third to one-fourth 

 the width of those of B. diluviana. 



Gonocysts low, rounded domes ; three or four times the width 

 of the zooecia. 



Formula. p, c, I, r=l, 0, 2, '0. 



DISTRIBUTION. 



Cornbrash : Rushden. 

 Bradford Clay : Bradford. 

 Great Oolite : Richmond boring. 



Description of Figures. PL IY. Fig. 5. Part of a zoarium 

 showing gonocysts, x 18 dia. Great Oolite: Richmond boring. 

 Presented by Prof. J". W. Judd, F.R.S. D. 1912. PI. IV. Fig. 6. 

 Part of a worn zoarium, x 16 dia. ; showing form of zooacia and 

 gonocysts. Cornbrash : Rushden. 60535. 



Affinities. This species is characterized by the delicacy and 

 narrowness of its zooacia. It thus takes the place in the Berenicea 

 series held by S. waltoni in that of Stomatopora, and D. mettensis 

 in that of Diastopora. 



Its nearest ally is B. diluviana, from which it differs only in the 

 size of the zocecia and the less elevation of the peristome. It 

 differs from B. undulata (Mich.) in the absence of the wavy ridges 

 that cross that species, and also by the size of the orifices. The 

 smallness of the apertures reminds one of the species described as 

 B. microstoma by Haime. This, however, is only a synonym of 

 B. undulata (Mich.), while the true D. microstoma of Michelin is 

 referred to the genus Reptomultisparsa. It differs from this, in 

 addition to the generic characters, by the orifices being more 

 crowded and smaller, and the surface plain. 



