188 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



1846. Lithodendrum Uneatum Conrad, Am. Jour, Sci., 2d ser., I, p. 220. 

 1848. Anthophyllum Uneatum Bronn, Index PaltBontologiciis, T, p. 83. 

 1864. Cladocora? ZiweoiaMEEK, Check-list Invert. Foss. N. Am. Miocene, p. I. - 

 1895. Astrangia Uneata Gane, Johns Hopkins Univ. Circ, XV, No. 121, p. 9. 



Colony encrusting, consisting of conical or cylindrical corallites, the 

 largest sometimes rising a centimeter above the surface of the basil 

 expansion. Individual corallites divergent, but usually touching at 

 their bases. Walls very thin at their calicular edge, thicker below. 

 Epitheca extremely thin, finely granulated and in some forms sLowing 

 parallel, somewhat sinuous, flat and broad striae extending to the base. 

 True costse of unequal size are at times present in the vicinity of the 

 calicular edge. Calice as a rule circular, at times considerably 

 comi)ressed, deep. Septa much narrowed at the top, in mature forms in 

 four complete cycles; septa of the last cycle much thinner and narrower 

 than those of the preceding, often merely rudimentary ; in the youniior 

 individuals septa but thirty-six; there is a tendency for the younger 

 septa to turn toward and unite with the older; inner edges strongly 

 dentate, teeth slightly coarser near the columella; sides -granulated, 

 though not stoutly so. Columella small and formed of a net-work 

 of trabicula3 with additions from the septal ends. Multiplication by 

 budding chiefly from basal expansions, although it may take place well 

 up on the side of a parent corallite. 



The writer refers this species to the genus Astrangia, although there 

 is more of an epitheca present than has been hitherto considered as 

 characteristic of the genus. In all other respects this species seems 

 to be typical. Lonsdale, in his description of the coral, f-^tates that it 

 closely resembles the LWiodendron fiexuosum described by Michelin in 

 his Iconograi)hie Zoolphytogique, from the faluns of Touraine, but 

 Edwards and Haime have since pronounced the species of Michelin to 

 be a Cladocora. As this American species lacks pali and possesses 

 neither a shallow calice nor septa quite exsert, it can not belong to the 

 genus Cladocora. 



Dimensions.- — Breadth of calice, from 4 to 8 mm. 



Geological liorizon. — Miocene, Chesapeake formation. 



Locality. — Bellefield, Yorktown, Carters Landing, and City Poinl}, 

 Virginia. 



Collections. — U. S. National Museum; Philadeli3hia Academy of 

 Natural Sciences; Wagner Free Institute of Science; Johns Hoi)kins 

 University. 



ASTRANGIA ASTRiEIFORMIS Edwards and Haime. 



1850. Astrangia astrmformis Edwards and Haime, Ann. des Sc. Nat., 3d ser., XII, 



p. 181. 

 1857. Astrangia astrceiformis Edwards and Haime, Hist. Nat. des Coralliaries, II, 



p. 614. 

 1863. Astrangia astrceiformis Verrill, Mem. Boston, Soc. Nat. Hist., I, ji. 39. 

 1871. Astrangia astrwiformis Pourtales, 111. Cat. Mas. Comp. Zool. Harvard Coll., 



No. IV, p. 80. 

 1895. Astrangia astrceiformis Gane, Johns Hopkins Univ. Circ, XV, No. 121, p. 9. 



