281 



It is lint dlS- 



uiiil'oriii and 

 iuoadcr curve from tlie thecal memhrane than in the associated forms. 



.Mesoporos are more numerous in this sjiecies than in V. alternatum of tiie 

 Kdon of Cincinnati. 



Occurrence: Pierce limestone. 1 mile southwest of Lascassas, Kuther- 

 ford County, Tennes.s(>e. 



Holotype : 241-17. Indiana I'liiversity. 



(iciiii.s Aiiolotichiii riricli. (lenotype: Anolotichia ponderosa IJlrich. 

 Anolotichia Ciricli, (ieol. Surv.. Illinois, S. ISJMt. pp. :1S1. 474; Geol. Minne- 

 sota. :{, 181«. p. :V2{i: Zittels Textl). I'al. (En,£:l. ed.t. ISIK'.. p. 2(JS. Xickles 

 and Bassler, Bull. U. S. Geol. Surv., 17:]. VMM). ]k 24. P.rahau and Shinier. 

 X. A. Index Fo.s.sjls, 1, 1!)(>7, p. 123. Bassler Bull. V. S. Nat. Mus., 77. 1011. 

 p. !)1 : Zittel-Eastman Textb. Pal., 1913, p. 328. 



Zoarium ramose, digitate, laminate or incrustinj;; zooecijil tubes are com- 

 paratively la rue. .subpolygonal, long and intersected by more or less remote 

 diapliragms: lunarium slightly elevated at the surface and traversed in- 

 ternally by two to six minute vertical, closely tabulated tubes: mural pores 

 pri'seiit. 



Anolotichia (.rpldiKitd ii. Hp. Plate III. Figs. 1-4. Zoarium is explanate. 

 and lamellose. forming dome-like masses by the superposition of laminar 

 expansions which vary from one to three mm. in thickness. The largest 

 specimen observed is 70 mm. in diameter and from 10 to 30 mm. in depth. 



The surface is smooth with about 5 inconsi>icuous maculae of large zoo- 

 ecia in one sq. mm. 



The tangential section shows the zooecia to have large, direct, polygonal, 

 relatively thin-walled apertures ; four to five in 2 mm. Mesopores are few, 

 occurring more fre^iuently in the maculae than elsewhere. Lunaria are dis- 

 tinct crescents with ends projecting slightly into the zoecial cavity. Three 

 to six vertical tubuli traverse internally each lunarium. 



In the longitudinal section the zoecial tubes rise at an acute angle from 

 a thin epithelium and bend almost immediately directly towards the sur- 

 face. Thin comi)lete diai>hragms one to three tube diameters apart cross 

 the zoecial tubes. Tlie wall structure as shown in the ligure. is character- 

 istic of the genus. 



Aii(iliti<liiii crpldiHitd is distinguished from .1. iK/ddirosd and A. ini- 

 jiolih by the form of the zoarium. and from the exitaiislve sjiecies of the 

 I'liropean types liy its more robust growth, greaier lenuth of the zoecial 

 tulies and more diaphragms. 



Occurrence: Pierce limestone. Miirfreeshoro. Tennessee. 1', in. X. \V. 



