MARYLAND GEOLOGICAL SURVEY 439 



The individuals of this form generally occur alone attached to some 

 shell, but occasionally they are found in clusters, being in close contact 

 with one another at their sides or the outer edge of their bases. 



Height of largest specimen, 4 mm. ; breadth of calice, 11 mm. 



Description modified from the one given by Gane, 1900. 



Occurrence. — Chesapeake Group. Carter's Landing, James Eiver, 

 and Yorktown, Virginia, and the Upper Miocene of Wilmington, ISTorth 

 Carolina. 



Collections. — U. S. National Museum (type), Wagner Free Institute 

 of Science, Johns Hopkins University. 



Family OCULINID/^ Milne-Edwards and Haime. 



Genus ASTRHELIA Milne-Edwards and Haime. 



Astrhelia palmata (Goldfuss). 

 Plate CXXIII, Figs. 1-4. 



Madrepora pahnata Goldfuss, 1836-1833, Petrefacta Germaniae, pt. i, p. 33, pi. xxx, 



tigs. 6, a, b. 

 Oculina palmata Ehrenberg, 1834, Abb. Berlin Akad. Wiss. for 1833, pp. 305, 344. 

 Madrepora palmata de Blainville, 1834, Man. Act. ou Zooph., p. 390. 

 Ifadrepora palmata Lamarck, 1836, Hist. Nat. An. sans Vert., 3d ed., vol. ii, p. 450. 

 Oculina palmata Bronn, 1848, Hand. Gesch. Nat., Index Pal., pt. i, p. 835. 

 Astrhelia jxtlmata Milne-Edwards and Haime, 1849, Compte Rendus Ac. Sci., xxix, 



p. 68. 

 Astrhelia paluiata Milne-Edwards and Haime, ISoO, British Fossil Corals Introd., 



p. 20. 

 Astrhelia palmata Milne-Edwards and Haime, 1850, Ann. Sci. Nat., :!d ser., vol. 



xiii, p. 74. 

 Astrhelia palmata Milne-Edwards and Haime, 1851, Archiv Mus. Hist. Nat. Paris, 



voL V, p. 37. 

 Astrhelia palmata d'Orbigny, 1853, Prod. Pal. Strat., vol. iii, p. 146. 

 Astrhelia palmata Bronn, 1853-1856, Lethase Geognostica, pt. vi, p. 307. 

 Astrohelia palmata Milne-Edwards and Haime, 1857, Hist. Nat. des CoralL, vol. ii, 



p. 111. 

 Astrohelia palmata de Fromentel, 1861, Introd. Etud. Polyp. Foss., p. 178. 

 Astrohelia palmata Meek, 1864, Miocene Check List, Smith. Misc. Coll. (183), p. 1. 

 Astrohelia pahnata Gane, 1895, Johns Hopkins Univ. Circ, vol. xv. No. 131, p. 9. 

 Astrohelia palmata Gane, 1900, Proc. U. S. Nat. Museum, vol. xxii [No. 1193], pp. 



185, 186. 



Description. — Corallum presents three forms of growth; one, as irreg- 

 ular nodose branches, which may exceed 120 mm. in length ; a second, as 

 flattened coalescing branches; a third, as palmate branches. 



