M. K. A. Zittel on Fossil Hexactinellida. 503 



The csecal radial, canals are straight and rather strong. Ske- 

 leton consisting of large coalescent sexradiates with solid 

 crossing-nodes, forming a regular open network with cubical 

 meshes. Sometimes a covering web like that of Tremadictyon 

 is present. 



"^ Scyphia parallela^ Goldf. Taf. iii. 3. 



S. dathrata^ Goldf., Taf. iii. 1. 

 ^8. jtaradoxa^ Miinst., Goldf. Taf. xxi. 6. 

 *yS'. Beaumontij lleuss, Bohm. Kr. Taf. xvii. 12. 

 '\Laocoetis infundihulata, Pom. Pal. de I'Oran, pi. i. his^ 



^L. dichotomaj Pom. I. c. pi. ii. his^ 3, 5. 



EuBROCHUs, Sollas :|:. 

 Geol. Mag. 1876, p. 398. 



Sphenaulax, Zitt. 



Top-shaped, cup-shaped, or wedge-shaped. Upper margin 

 truncated. Wall thick, laid in coarse maiandric folds, which, 

 on the outer surface, are separated by deep longitudinal fur- 

 rows. The folds traversed by cajcal radial canals, the round 

 ostia of which open on the wall of the central cavity, and 

 stand in vertical and horizontal rows, crossing each other at 

 right angles. Skeleton and covering-veil as in Craticularia. 



ScypJiia costata, Goldf. Taf. ii. fig. 10. 



SPORA.DOPYLE, Zitt. 



Cup-shaped, funnel-shaped, or ramose. Outer surface with 

 the ostia scattered or standing in quincunx. Radial canals 

 simple, blind. Inner wall with ostia arranged in rows. Ske- 

 leton and superficial layer as in Craticularia, 



Scyphia ohliqua^ Goldf. Taf. iii. 5 a, &, d. 

 *>S'. texturata, Goldf. Taf. ii. 5. 

 '^8. secunda^ Miinst., Goldf. Taf. xxxiii. 7. 



Spongites ramosus, Quenst. Jura, Taf. 83. 1. 



Verrucoccelia, Etallon. 



Actes de la Soc. Jurass. d'emul. de Porrentruy, 1860, p. 129. 



Polyzoic, ramose, frequently with calic3S arranged like 

 buds aroand a common stalk. Central cavities tubular, com- 

 municating, with a terminal aperture or closed. Canal-system 



X The geuus Eubrochus is iiisufRciently characterized ; possibly iden- 

 tical with Craticularia. 



