94 SILICEOUS SPONGES. 



Genus CRATICULARIA, Zittel, 1877. 



Ceaticularia clathrata, Goldf. sp. 



1833. Sajphin clathrata, Goldf. Petref. 1 Th. p. 8, t. 3. f. 1. 



1877. Craticularia clathrata, Zitt. Studien, I Ab. p. 46; Neues Jahrbuch, p. 355. 



1878. Spongites clathrata, Quenst. Petref. Bd. 5, p. 74, 1. 117. f. 23, 25. 



Distribution. Upper Jura : Heuberg, Randen, Wiirtemberg. 



Craticulaeia paeallela, Goldf. sp. 



1833. Scyphiajiarallela, Goldf. Petref. 1 Th. p. 8, t. 3. f. 3. 



1877. Craticularia parallela, Zitt, Studien, I Ab. p. 46; Neues Jahrbuch, p. 355. 



1878. Spongites cylindritextus, Quenst. Petref. Bd. 5, p. 65, t. 117. f. 9-15. 



Distribution . Upper Jura : Heuberg, Wodna, Cracow {ZitteVs coll.). 



Ceaticulaeia decoeata, Milnster, sp. 

 1833. ScyiMa decarata, Miinster in Goldf. Petref. 1 Th. p. 90, t. 33. f. 2 a, b. 

 Distribution. Upper Jura: Randen. 



Ceaticulaeia paeadosa, Milnster, sp. 



1833. Scyphia paradoxa, Milnster in Goldf. Petref. 1 Th. p. 86, t. 31. f. 6. 



1877. Craticularia paradoxa, Zitt. Studien, I Ab. p. 46 ; Neues Jahrbuch, p. 356 ; Hand- 



buch d. Pal. p. 174, f. 90. 



1878. Clathrispongia trochiformis, ventricosa, et perlata, Quenst. Petref. Bd. 5, pp. 75, 76, 



80, 1. 118. f. 2, 3,6. 



Distribution. Upper Jura: Streitberg {Zitt. coll.), Randen, Wiirtemberg. 



Ceaticulaeia Fittoni, Mantell, sp. (Plate XXIII. figs. 2, 2 a, 2 b.) 



1833. Millepora Fittoni, Mantell, Geology S.E. of England, p. 378. 



1822. Millepora , Mantell, Geol. of Sussex, p. 106, t. 15. f. 10. 



1848. Brachiolites digitatus, Toulmin Smith, Ann. Mag. Nat. Hist. vol. i. pp. 45, 365, 



1. 16. f. 2. 

 1854. Brachiolites Fittoni, Morris, Cat. Brit. Foss. p. 26. 

 1864. Dendrospongia fenestralis, F. A. Roemer, Palseont. Bd. 13, p. 21, t. 8. f. 6. 



Sponges growing in masses of straight or slightly sinuous cylindrical branches, 

 from 22 mm. to 35 mm. in diameter and in some cases more than 220 mm. in 

 length. The branches are hollow tubes with walls from 2-6 mm. to 4 mm. in thick- 

 ness ; the summits are open. The canal-apertures, both on the outer and inner 

 wall-surfaces, are disposed in vertical and horizontal rows ; the apertures are sub- 

 quadrate at the surface, and from 1 mm. to 1'5 mm. in width. 



In most of the examples the spicular structure has been completely replaced by 



