PROBOSCINA. 69 



5. Proboscina rigauxi (Sauvage), 1889. 



SYNONYMY : 

 Stomatopora rigauxi, H. E. Sauvage, 1889, Bry. jur. Boul. : Bull. Soc. geol. 



France, sr. 3, t. xvii. p. 42, pi. iii. figs. 6-8. 



,, sp. G. R. Vine, 1887, Jur. Polyz. Northptn. : Journ. 



Northptn. Nat. Hist. Soc. vol. iv. p. 204, pi. i. fig. 2. 



Proboscina ,, Gregory, 1895, Eev. pt. ii. : Ann. Mag. Nat. Hist. ser. 6, 



vol. xvi. p. 449. 

 Proboscina Clementina var. minuta, Vine, 1893, Polyz. Thrapston: Proc. Yorks. 



Geol. Soc. vol. xii. p. 256, pi. xiii. fig. 9. 

 ,, var. depressa, Vine, 1893, ibid. p. 256. 



DIAGNOSIS : 



Zoarium forming dense circular tufts. The branches end in 

 crowded tufts, which almost form Heremcea-like sheets. 



Zocecia cylindrical, short, thick. Front wall with a well- 

 marked transverse ribbing. Surface punctulate. 



Peristomes raised into a thickened rim, but not reflexed. 



Formula. p, c, I, r = 1, 0, 2, 1-12. 



DISTRIBUTION. 



ENGLAND : 



Cornbrash : Rushden. 

 FOREIGN : 



Bathonian Fuller's Earth: Hydrequent, near Boulogne (fide Sauvage). 



Description of Figure. PI. II. Fig. 6. Part of zoarium en- 

 crusting Terelratula intermedia, J". de C. Sow., X 12 dia. 

 Cornbrash : Rushden. B. 4846. 



Affinities. This species is extremely well marked. It was care- 

 fully described and figured by M. Sauvage. It is distinguished 

 by the broad expansions at the ends of the branches, which often 

 greatly resemble Berenicea. There is, however, always a marked 

 difference between the fenestrated zoarium of this species and that 

 of the nearest forms of Berenicea. Even in such species as Bere- 

 nicea compacta (Norman), 1 which have greatly divided zoaria, the 

 characteristic distinction between this and Proboscina can be seen. 

 Though including the two varieties of P. Clementina in this species, 



1 See Stomatopora compacta, Hincks. Brit. Mar. Polyz. p. 435, pi. Ixiii. 

 figs. 1, 2. 



