289 



ISfd. pp. 154, 27S. ricti't, Trjiilc ilc Pal.. 2(1 oil., 4. IS,")?. )>. 1.",!. Xicliolsoii. 

 ral. Ohio. 2, 1875. p. 214; Pal. Tal). Corals, 1S7!>, p. 202. Zitlrl. ilaiidl). Pal.. 

 1. ISSO. p. 015; (Joiius Monticulipora, ISSl, p. 97. TTliidi, .lour. ( "inciiiiiati 

 Soe. Nat. Ili.st.. 5. 1SS2, p. 150; 0. ISS.'J, p. 2t;."'>. Kociiici-. Loth, u'coj?., pt. 1, 

 I.cth. Pal.. ISS.*!. 1). 4S5. .Tanie.s and James. .loiir. ("inciiiiiali Soe. .Nat. Hist., 

 n, ISSS. ].. 2<l. I'lricli. (!col. Surv. Illinois. S, 1S!)0, pp. .•;74, 42:;. Uouiiiiger. 

 Amor. (iool.. (!. IS'.IO. ]>. li:{. Ulric-li. Gool. Miiinosota, 3, 1S9.% p. 311; Zittel's 

 Toxtli. Pal. (IOiij,'l. 0(1. 1. ISIHi. p. 270. J. F. James, Jour. CMncinnati See. Nat. 

 Hist.. IS. ISlXi. p. 117. Xickles and Bassler, P,ull. U. S. Geol. Surv., 173, 

 IIXX). p. 34. Grabau and Shimer, N. A. Index Fossils, 1, 1907, p. 135. earn- 

 ings, 32d Ann. Kept., Dept. Geol. Nat. Res. Indiana. 1908, p. 742. Bassler, 

 liidl. U. S. Nat. Mus.. 77. 1911, pp. 218. 219; Zittel-Eastman Textb. Pal., 2d 

 ed.. 1913, p. 334. Stellipora Milne-Edwards Hist. Nat. des Corall, 3, 1800, 

 p. 281 (in part). Dyhonsld, Du Ghaetetiden d. Ostbalt, Silur.-Form., 1877, 

 p. 42. 



Tli(> following (lolinilion is from the Zittol-Fasfmnn textbook as given by 

 P.a.ssler : 



"Zoaria growing ereet (into solid branches) from attached local expan- 

 sion. Surfaee with depressed stellate maculae, the spaces between the ray.s 

 elevated and occupied by two or three short rows or clusters of closely 

 approximated zo<wcial apertures. Mesopores aggregate in the maculae, 

 internally with gradually crowding diaphragms." 



The words in parentheses were added by the author. 



Coustcllaria lamellosn n. sp. Plate VII, Figs. 3-5. The zoarium consists 

 of thin laminar expansions. .3 to 1.5 mm. in thickness. The base is covered 

 with a wrinkled epitheca that assumes the general form of the object upon 

 which the colony grows. Cylindrical, tubular stems grow upward from the 

 expanded portion. 



The maculae are irregular stellate, aggregations of mesopores that are 

 raised slightly above the surface : al)out 9 in 14 >^(l- miu- The macular rays 

 are of variable size and shape and extend between clusters of contiguous 

 subangular zooecia. The intermacular zooecia are circular and completely 

 separated by mesopores ; about S in 2 mm. 



Diaphragms in the zooecial tubes are few. more numerous in the peri- 

 pheral region than in the earlier portion. The mesopores are crowded with 

 diaphragms throughout, about 7 in .5 mm. The mesopores originate in the 

 early primitive zone and extend to the surface. 



The internal structure of this species agrees completely with the generic 

 description, and for that reason is assigned t(» Constellaria. The manner of 

 growth of the zcjarium is «iuite different from any other described species 

 of the genus. 



Occurrence : Pierce limestone. ^Murfreesboro. Tennessee ; 1 mile south- 

 west of Lascasses. at Stones Itiver Bridge. Uutherford C'ount.v, Tennessee. 



Holotype : 53993 U. S. ,Nat. Mus. 



Paratypes: 241,— 10, 24. 25 ; 245-15. Indiana University. 



Genus NichoIsoncUa Vlrich. Genotype: Nicholsonella pouderosa Ulrich. 



