138 INVERTEBRATA. 



Locality. Upware. 



E. angusta d'Orb. is from Grand prd, Ardennes (Albien). 



ENTALOPHORA DENDROIDEA, n. sp. 

 (Plate vn. fig. 12, a, 6.) 



A stout dendroid Polyzoarium, composed of many layers of 

 superposed polypides. The branches are round in section, and 

 they divide irregularly, sometimes dichotomously. 



The cell apertures are small and but slightly projecting ; they 

 are spirally arranged, in quincunx order, and the interspaces are 

 wide and smooth. A faint outline of the contours of the cell 

 bodies may sometimes be seen as in Multelia irregularis (d'Orb.). 



Affinities and differences. The many layers of cells of which 

 the colony is composed distinguish this from all the other species 

 of Entalophora. Indeed it is a character of generic value according 

 to M. d'Orbigny's system. The large size and stoutness of the 

 colony are also very characteristic. The peculiar mode of growth 

 of Multelia which produces successive zones of different thickness 

 at once distinguishes all the forms of that genus from our species. 



Localities. Upware, Brickhill. 



MELICERTITES UPWARENSIS, n. sp. 

 (Plate vii. fig. 13, a, 6.) 



A large branching species, forming a colony like that of the 

 common Entalophora ramossissima. The branches frequently 

 anastomose. 



Cell apertures large, subtriangular, the base straight or slightly 

 convex towards the cavity, sides simple, apex rounded. Each 

 cell aperture is bounded by a definite ridge. The cells are rather 

 close packed and arranged in spiral lines. 



The large size and anastomosing character of the colony, the 

 shape of the cell apertures, and their denser packing serve to dis- 

 tinguish this from M. Meudonensis, d'Orb. 



SEMIMULTICAVEA (RADIOPORA) TUBERCULATA, d'Orbigny. 

 Semimulticavea tuberculata, d'Orb. Pal. Fr. Ter. Cre't. v. p. 980, 

 pi. 648, f. 14. 



