124 SILICEOUS SPONGES. 



Ctpellia c^spitosa, Quenst. sp. 



1878. Dolispongia ccespitosa hexamera, Queust. Petref. Bd. 5, p. 311, t. 130. f. 12. 

 Distribution. Upper Jura: Randen'? 



Cypkllia libera, Quenst. sp. 



1878. Nexispongia libera, Quenst. Petref. Bd. 5, p. 162, t. 123. f. 1. 

 1878. Cypellia prolifera, Zitt. Neues Jahrb. p. 62. 



Distribution. Upper Jura : Heuberg, Randen. 



Genus STAURODERMA, Zittel, 1877. 



Stauboderma Lochense, Quenst. sp. 



1858. Spongites Lochensis, Quenst. Der Jm-a, p. 669, t. 81. f. 96. 



1877. Stauroderma Lochense, Zitt. Studieu, I Ab. p. 53 ; Neues Jahrbuch, p. 364, t. 4. f. 2. 



Distribution. Upper Jura : Heuberg, Streitberg. 



Stauroderma ctlindr.\tum, Quenst. sp. 



1858. Spongites cylindratus, Quenst. Der Jura, p. 686, t. 83. f. 8. 



1878. Cavispungia cyUndrata, Queust. Petref. p. 158, t. 122. f. 19, 20. 



As seen in a polished section, the interior structure of the wall of this species is 

 composed of relatively large spicules with solid nodes, forming an irregular mesh 

 similar to that of Stauroderma Lochense. I have not, however, detected any dermal 

 layer of distinctive cross-shaped spicules ; so that it is doubtful whether this form 

 rightly belongs to the genus Stauroderma or not. 



Distribution. Heuberg, near Balingen, Wiirtemberg. 



Genus PURISIPHONIA, Bowerb. 1869. 

 PuRisiPHONiA Clarkei, Bowerb. 



1869. Purisiphonia Clarkei, Bowb. Proc. Zool. Soc. p. 342, pi. 25. f. 6, 7. 



1870. Purisiphonia Clarkei, Moore, Quart. Journ. Geol. Soc. vol. xxvi. pp. 235, 240, 

 pi. 17. f. 1. 



1878. Purisiphonia Clarkei, Carter, Ann. & Mag. Nat. Hist. 5th ser. vol. i. p. 376. 



1878. Purisiphonia Clarkei, Zitt. Haudbuch der Pal. vol. i. p. 179. 



1878. Purisiphonia Clarkei, R. Etberidge, jun., Cat. Austral. Foss. p. 104. 



Distribution. Lower Cretaceous 1 : Wollumbilla Creek, North Queensland, Aus- 

 tralia {coll. Bowerbank). 



