528 



LONSDALE ON EOCENE CORALS EROM N. AMERICA. 



19. ESCHARA TUBULATA. (sp. n.) 



Foliaceous ; cells elongated, rows defined by a slight furrow, no marked sepa- 

 ration between successive cells, surface slightly convex ; mouth small, trans- 

 versely oval, margin thickened ; interior of cells, sides nearly straight ; dorsal 

 separation of opposite layers imperfect. 



a. Mature cells of Eschara tubulata. 



b. Aged cells, the fractured portion exhibits imperfectly separated dorsal sur- 

 faces. (Magnified 12, linear.) 



The above characters were obtained from a specimen an inch 

 in length and nine lines in width, but which gave only more aged 

 conditions of the coral. The cells in their narrow, lengthened 

 form resembled the tubuli of Diastopora ; but the mouths were 

 strictly in the plane of the outer surface, and there was not the 

 slightest tendency to a free portion at the distal termination, or to 

 an underlying at the proximal ; the whole outer structure being 

 on one level, and the back of the interior parallel to it. No clear 

 indications of vesicles were noticed. In the most aged cells, 

 occupying the lower portion of the specimen, the exterior was 

 lozenge-shaped, or had an increased breadth, the longitudinal 

 furrows were almost obliterated by the thickening of the surface, 

 and the mouths were generally very much contracted and in some 

 cases filled up. Every attempt to separate the dorsal surfaces in 

 this and two following species failed. 



Locality. — Wilmington. 



20. Eschara petiolus. (sp. n.) 



Foliaceous, springing from a stalk-like base ; cells oblong, surface slightly 

 convex, porous, bounded by a faint furrow, mouth longitudinally oval ; some- 

 times a small triangular pit by its side ; interior of cells lozenge-shaped ; dorsal 

 surfaces not separable ; connecting foramina near the base of the lateral and ter- 

 minal walls. 



No immature cells were observed, but in the youngest state 

 exhibited, the mouth had a projecting margin which gradually 



