142 INVERTEBRATA. 



HETEROPORA (MULTICRESCIS), sp. 



Allied to Heteropora cryptopora, Goldfuss, but the colony is 

 more massive and less branching and the cells are much larger. 

 It is near to Multicrescis variabilis, d'Orb., but that is a much 

 smaller Cenomanian species, branching, and not spreading and 

 massive as is the habit of the Wicken form. 



Locality. Upware. 



HETEROPORA (MUTICRESCIS) sp. 



Grows apparently in the form of massive cylindrical or pyri- 

 form, slightly flattened branches. Only one specimen is known, 

 which measures 4 x 1 x f in. greatest length, breadth and 

 thickness. There is an irregular swelling at the upper third of its 

 length, where a lateral stem was given off at an acute angle. The 

 cells are arranged in numerous superposed layers, and on the 

 perfect surface their openings are seen to be small, and sur- 

 rounded by a number of small pores. 



This is allied to Heteropora digitata, Mich. 



Locality. Upware. 



HETEROPORA (NODICRESCIS) ANNULATA, sp. nov. 

 (Plate vii. fig. a, b.) 



Polyzoarium fixed by an expanded base, whence arise a number 

 of stout, irregular, cylindrical, terete trunks. 



These trunks are commonly united in their lower part into a 

 stout, irregular, upright plate or amorphous mass, presenting 

 rounded protuberances. 



The free trunks are cylindrical and massive, usually curved and 

 sometimes anastomosing ; they here and there give off lateral 

 protuberances and stout branches. 



The whole surface is covered with small ridges and promi- 

 nences, arranged confluently into lines, running more or less 

 transversely, so as to produce an annular, obliquely-annular, or 

 spiral appearance over the whole body. 



Cell-mouths small, rounded or squarish, irregularly scattered, 

 with few and variable intermediate pores of about half the size of 

 the cell apertures. 



Our specimens (Woodw. Mus.) attain a height and breadth of 

 3 4 inches, the branches being a half and three-quarter inches in 

 diameter. 



