530 



LONSDALE ON EOCENE CORALS FROM N. AMERICA. 



22. ESCHARA LINEA. (sp. n.) 



Foliaceous ; cells oval or oblong, sometimes bounded incompletely by a 

 slightly raised line ; surface nearly flat, very porous ; mouth transversely semi- 

 oval, margin thickened, notched or plain on the proximal edge ; occasionally a 

 foramen on one side of the mouth penetrating obliquely or towards a correspond- 

 ing chamber at the distal angle of the interior of the cell ; dorsal separation per- 

 fect, surface ridged or flat. 



The above characters were only- 

 obtained from older conditions of 

 the coral. The raised lines were 

 in portions of the specimens pro- 

 minently developed, but in others 

 were entirely wanting. In some 

 cells so connected with the ge- 

 neral surface as to indicate that 

 they belonged to the species, the 

 covering was much less porous, 

 and in a few instances smooth or 

 solid, while the mouth and adja- 

 cent vesicles, occasionally two in 

 number, were much more promi- 

 nent. These variations had been 

 apparently produced by curva- 

 tures in the growth of the speci- 

 men. The pores differed in size 

 and form, sometimes assuming the 

 character of distinct, round fora- 

 mina. No connection was traced 

 between the obliquely penetrated 

 vesicle and the small chamber at 

 the angle of the cell ; but occa- 

 sionally a distinct arched solid 



llfKfl 



mm i "■',■ W/J///A 



The centre of the figure represents 

 mature cells of Eschara linea magni- 

 fied 20, linear ; the upper part abraded 

 cells, with indications of the pits at 

 the angles noticed in the description, 

 and oval foramina : the faintly-tinted 

 lowest portion represents a perfectly 

 separated dorsal surface. 



layer ranged from the opening of 



the vesicle to the distal angle of the cell. The characters of 



the perfectly separated, flat, dorsal surface are indicated in the 



figure. 



Locality. — Eutaw. 



23. Eschara viminea. (sp. n.) 



Foliaceous ; cells elongated, surface convex, porous, mouth transversely oval, 

 depressed, proximal edge a notched plate ; occasionally one or two foraminated 

 vesicles at the corners of the proximal margin ; dorsal separation perfect, surface 

 ridged. 



This species was distinguished by the wicker-like character of 

 the general surface. Mouthless cells were noticed among those in 

 a mature condition. The aged state presented a greatly thickened 

 outer surface, the boundary of the cell being defined by a deep 

 continuous groove ; the oral apertures were also obliterated and 

 the pores rendered indistinct. 



