.'52 pai,.K()NT()L()(;y. 



The spocinien referred to tlie ;il)(»\e .species seems to agiee well with 

 the published figures and descriptions of that form. Its outer walls, as 

 seen in transverse sections, are perhaps a little thinner, and its septa slightly 

 more rigid or less curved, than represented in Edwards and Haime's enlarged 

 figure of Goldfuss' species ; but, unless better specimens than that I have 

 seen might reveal some other characters than those observed, I cannot see how 

 it can be separated from the Eiiropean form. 



It has much smaller corallites than any other species of the genus 

 known to me from Amencan rocks. 



Locality and position . — Treasure Hill, Nevada; silver-bearing Devonian 

 beds. 



^ Genus SMITHIA, E. & H. 



Smitiiia Henmahii, Lonsdale (.sp.). 



Plate 2, fig. 6, (i a. 



Astnva nennuMi (\)AV»),\mis6.. (1840), in Sedgwick and Murchison, Gcol. Tran.s., .Id 

 ser., V, C97, pi. 58, fig. 3.— Phillips (1841), PaliEozoic Foss., 12, pi. 6, fig. IG. 



Cyatliophyllum Jhnnahii, Bronn (1848), Index Palieont., I, 3G8. 



JAthostrotion Ucnnnhii and Actinocyathus Hcn'.iahii, d-Orbigny (1850), Prodr.de Pal6ont., 

 I, !<;« and 107. 



Phillipsastrm llonuiliii (pars). d'Orbigny (1860), ib., 107. 



Smilhia Ilenntihii, Edwards and naiine (1851), Polyp. Foss. des Terr. Paleoz., 421; 

 Brit. Foss., Corals, 240, pi. 54, fig. 4.— Edwards (1860). Hist. Corall., Ill, 413. 



Arachmphyllum Bcnnahii, McCoy (1851), Brit. Palajoz. Foss., 72. 



Acervularia seriaca, Quenstedt (1852), Daiidl). der Petret., GG4, pi. GO, fig. 3. 



Corallum apparently subhemispherical in general form. Mural circles 

 from twice to about four times their own diameter apart, but irregularl}^ 

 an-anged ; as seen in a transverse section, moderately well defined. Septa 

 twenty-three to twenty-six, very thin excepting near the mural circles, where 

 they are somew hat thickened, and every alternate one terminates, while the 

 others continue straight inward nearly to the center ; all more extended, 

 straighter, and more directly confluent in one direction (usually outward 

 toward the periphery of the corallum) than transversely to the same; in 

 which latter direction they are variously curved, or more or less abruptly 

 geniculated. Vertical section showing the vesicular dissepiments betw^een 

 the septa to be very thin, nearly horizontal, and rather closely arranged. 



