SECONDARY AND TERTIARY FORMATIONS OF NORTH AMERICA. [, [ 



Colony composed of filiform dichotomous branches, surrounded by a few long tubu- 

 lar, scattered cellules. Cellules long, arcuate, placed irregularly, very exsert at the 

 extremity ; lower portion marked by a prominent swell on the surface of the colony, 

 with depressions between the separate cellules. Surface of colony and of cellules to 

 the extremity marked by numerous, irregularly placed striae. Colony flattened and 

 widened below the bifurcations. 



From the Eocene, probably of Alabama. 



This species was referred doubtfully to Pustulipora proboscidea, M. Edwards, on the 

 strength of a worn specimen, by Mr. Lonsdale. It differs from that species in being- 

 less robust, with striate tubes placed wide apart ; those of Edwards' species are always 

 smooth and placed rather closely. Both belonging to the same genus, the species of 

 M. Edwards must be called Entalophora proboscidea, that being the oldest species, and 

 the one before us thereby becoming nameless, we propose the above appellation. 



E. punctulata, n. s., fig. 61.— Colony composed of robust branches, usually sepa- 

 rating at rather wide angles, covered with large, prominent tubular cellules. Cellules 

 placed without order, sometimes crowded, at others considerably scattered ; tubular, 

 often curved, occasionally arising at an angle of about forty to fifty degrees from the 

 surface of the branch. Generally with the embedded portion and even part of the 

 free portion covered with punctations, varying from mere surface pits to complete per- 

 forations. The rest of the tube is striate longitudinally, striato-punctate or irregularlv 

 roughened. Ends of the branches filled with large numbers of germs of new cellules. 



Common at Santa Barbara, Cal. Miocene. 



The very rough free branches of this species, render it easily distinguishable to the 

 naked eye. The details of the cellules resemble, in a remarkable manner, those of 

 Cellepora Bellerophon from the same deposit. They can be distinguished, as remarked 

 under the description of that species, by the latter being always encrusting and cellu- 

 late, while in this the interiors of the cylindrical branches are always filled with germs 

 of centrifuginate cellules. The stride on the tubes of the Cellepore, seem to be always 

 somewhat spiral, in this species they are, when present, longitudinal. The mouths of 

 the tubes in the present species are rarely expanded. They often appear notched, 

 probably the result of fracture. 



DIASTOPORA. 



Colony in its young state encrusting, afterwards rising in an irregular plate, often 

 enrolled into a tube. Cellules on only one side, placed with greater or less regularity. 

 Opposite side covered with an epithelium. 



In its young condition this genus resembles Berenicia, but can be distinguished by 

 the latter genus never rising from the encrusted surface. From Discosparsa it is sepa- 

 rated by that genus being always in a more or less regular discoidal mass, attached by 



but one small point. 



It 



