va 
Parr II. Sxcr. iii. § 1.] CRETACEOUS. 805 
Discoidea, Cyphosoma, Diadema, Salenia, Cidaris. A few crinoids 
have been met with of which Bourgueticrinus and Marsupites of 
the upper chalk are characteristic. 

Fia. 390.—Urprer Cretaceous EcHInips, 
a, Echinoconus conicus (Brey.) (Galerites albo-galerus) (3); 6, Ananchytes ovatus 
(Leske) ($); ce, Micraster cor-anguinum (Klein) (4), 
Passing to the mollusca, we find the brachiopods (Fig. 391) abun- 
dantly represented by species of Terebratula and Rhynchonella, which 
approach in form to still living species. Other contemporaneous 

Fic. 391.—Cretraceous BRACHIOPODS. 
a, Terebratula carnea (Sow.) (3); 0, Terebrirostra lyra (Sow.) (3); ¢, Rhynchonella 
plicatilis, var. octoplicata (Sow.) (3). 
enera were Crania, Thecideum, Magas, Terebratella, Terebrirostra, 
and Terebratulina. Among the most abundant genera of lamelli- 
branchs are (Fig. 392) Inoceramus, Exogyra, Ostrea, Spondylus, 
