LONSDALE ON EOCENE CORALS FROM N. AMERICA. 



533 



delineated Lunulites with parallel non-alternate rows.* The cha- 

 racters of the concave surface could not be fully ascertained, but 

 no signs were noticed of irregular thickenings from the margin or 

 lines of renewed growth towards the centre. 

 Localities. — Wilmington, Wantoot ? 



26. Lunulites contigua. (sp. n.) 



Conical ; casts of cells cylindrical, short, oblique to the surface, opening 

 round, rows parallel, not alternate, divided by thin plates, successive cells con- 

 nected by foramina ; concave surface broadly ribbed, closely indented ; distance 

 between the two surfaces slightly exceeding depth of layer of cells ; a series of 

 shallow chambers between the rows of cells. 



a. Cast of the concave surface of Lunulites contigua magnified twice, linear. 



b. Portion of the same, greatly enlarged, to exhibit the irregular nature and 

 blending of the indentations on the surface : also the small interval between 

 the rounded ends of the casts of the cells and the concave surface. 



c. Exhibits, greatly enlarged, the lineal arrangement of the cells, the con- 

 necting filaments or casts of foramina, and the separating plates. 



This species resembled the last in the characters of the cells, 

 the connecting foramina, and the radiating plates ; but it differed 

 in the distance between the surfaces slightly exceeding the range 

 of the cells, and in the ribs of the concave cast being densely 

 covered by minute points sometimes blended together ; no fila- 

 ments similar to those which project from the equivalent portion 

 of Lunulites distans were noticed. 



Casts only of the interior structures, as in the preceding species, 

 were noticed, and the characters they exhibited are fully given in 

 the wood-cuts. 



Locality.- 



Wilmington. 



July, 1844— Sept. 1845. 



* For an observation respecting these chambers see the notice on the miocene 

 species, anti. 



