96 SILICEOTTS SPONGES. 



Genus SPORxiDOPYLE, Zittel, 1877. 



Spoeadoptle obliqua, Goldf. sp. 



1833. Scyphia obligua, Goldf. Petref. 1 Th. p. 9, t. 3. f. 5 a, b, d. 



1877. Sporadopxjle obliqua, Zitt. Studien, I Ab. p. 47 ; Neues Jalirb. p. 356, t. 2. f. 6. 



1878. Favispongia obliqua, Quenst. Petref. Bd. 5, p. 118, t. 120. f. 29-53. 



Distribution. Upper Jura : Randen, Streitberg, Bavaria. 



Spoeadoptle testdeata, Goldf. sp. 



1833. Scyphia texturata, Goldf. Petref. 1 Th. p. 6, t. 2. f 9. 



1833. Scyphia pertusa, Goldf. Petref. 1 Th. p. 6, t. 2. f. 8. 



1877. Sporadopyle texturata, Zitt. Studien, I Ab. p. 47 ; Neues Jahrbueh, p. 356. 



1878. Scyphia pertusa, Quenst. Petref. Bd. 5, pp. 126-129, t. 120. f. 61-69. 



Distrihction. Upper Jura : Eanden, Wiirtemberg. 



Spoeadoptle eamosa, Quenst. sp. 



1858. Spongites ramosus, Quenst. Der Jura, p. 683, t. 83. f. 1. 



1877. Sporadopyle ramosa, Zitt. Studien, I Ab. p. 47 ; Neues Jahrb. p. 356. 



1878. Ramispongia ramosa, Quenst. Petref. p. 140, t. 121. f. 11. 



Distribution. Upper Jura : Heuberg, Randen. 



Spoeadoptle, sp. 

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



Genus STEEPHINIA, Hinde, n. g. 



Sponges growing in irregular, convolute, anastomosing expansions or open cup- 

 shaped. The wall on both sides is irregularly reticulate with circular, oval, or 

 irregular canal apertures of relatively large size. The canals terminate blindly. The 

 spicular mesh is small and somewhat irregular, the spicular arms apparently smooth; 

 the nodes are solid. No special dermal layer is present. 



In the mode of growth this genus differs from any other of this family. The 

 characters of the spicular mesh resemble those of Sphenaulax and Sporadopyle. 

 The only examples are from the Grey Chalk, and their skeletons have been com- 

 pletely replaced by crystalline calcite. 



Steephinia convoluta, Einde, n. sp. (Plate XXIII. figs. 3, 3 c, 3i.) 



The walls of the sponge are convolute and anastomose so as to form irregular 

 masses. The wall is 4 mm. in thickness ; the outer surface is reticulate, with closely 

 set, circular or oval canal-apertures, from 1 to 1'5 mm. in width, and about 1*3 mm. 



