480 M. K. A. Zittel on Fossil LitMst{da>. 



Ehacodiscula, Zitt. 



Cm-allistes p.p., Schmidt. 

 ? Ductylocaly cites, Cart. 



Clavate, nodular, cylindrical or cup-shaped. Skeleton 

 formed of irregularly quadriradiate corpuscles, their arms 

 much branched at the ends. Surface with short-stalked, 

 lobate, siliceous disks. Recent and Cretaceous. 



1. Rhacodiscula asteroides. Cart. Ann. & Mag. Nat. Hist. 

 1873, vol. xii. p. 441. 



Corallistes poh/disois p. p., Schm. (non Bocage), Atl. Sp. iii. 8, 9. 

 Florida. 



2. Rhacodiscula, sp. n. Philippines. See Cart. Ann. & 

 Mag. Nat. Hist. 1876, xviii. p. 464. 



? 3. Dactylocalycites Vicaryi, Cart. Ann. & Mag. Nat. Hist. 

 1871, vol. vii. pi. vii. figs. 1, 2, 6. Cenomanian, Haldon. 



DiscODERMiA, Bocage. 

 (Journ. Sci. Lisb, 1869, no. 4, pi. xi. fig. 1.) 



Cup-shaped. Skeletal corpuscles quadriradiate, with much- 

 ramified ends. Both surfaces covered with entire (or much- 

 notched), very short-stalked, siliceous disks. Recent and 

 Cretaceous. 



1. Discodermia 'pohjdiscus, Boc. I. c, and BovV. P. Z. S. 

 1869, p. 96, pi. vi. figs. 10-14. Portugal, Cuba, Florida. 



?2. Dactylocalycites callodiscus. Cart. Ann. & j\Iag. Nat. 

 Hist. vol. vii. 1871, pi. ix. figs. 40-42. Cenomanian, Hal- 

 don. 



?3. Dactylocaly x-ii\\n\\c\\Q Scheiben, Zitt. Coelopt. v. 32-35. 

 Senonian, Haldem, Yordorf. 



Kaliapsis, Bow. 



(P. Z. S. 1869, p. 338, pi. xxv. figs. 2-5.) 



{Recent) . Incrusting, thin, without oscula and pores. Ske- 

 leton of smooth-armed quadriradiates, with the ends finely 

 ramified and filisrreed. In the corpuscles of the base the arm 

 that is directed downwards is not ramified, but pointed. Sur- 

 face covered with much-notched or entire disks, granulated in 

 the centre, and furnished with a short stalk. 



1. Kaliapsis cidaris, Bow. I. c. Pacific. 



Rhagadinia, Zitt. 



Cuptdospongia p. p., Rom. 



Sponge ear-shaped, flat, or basin-shaped, attached late- 



