DEVONIAN SPECIES. 27 



iiian of the White Initio District, an iii)])e:t(M-t specimen of an Ahrolitcs, 

 that grew in an irreg-uUir, rather thin, fohated form, with exceedingly 

 olilique calicos, of somewhat larger size and narrower form than the fore- 

 going-. This, I think, belongs to another species ; but the specimen is 

 scarcely in a condition to admit of its being figured and described. 



Genus FAVOSITES, Lamarck. 

 Fatosites (uikU. sp.). 



Plate I, dg. fi. 



Corallum small, subglobose or ovoid, often growing attached to shells. 

 Corallites rather small, and very unetpuil in size and form, in consequence 

 of the rapid growth of yoimg ones between the corners of the old, so as to 

 give the latter a polygonal or nearly circular outline, while the much 

 smaller young often appear at the surface with a trigonal or quadrangular 

 form, all rapidly radiating in all directions. Tabultc passing straight 

 across at intervals nearly equaling the diameter of the larger corallites. 

 (Septa and mural pores unknown.) 



Diameter of corallum, about 1.50 inches; of the largest corallites, 

 about 0.08 inch. 



The specimens of this little coral have all the cavities solidly filled 

 with silicious matter, so that it is scarcely possible to make out very clearly 

 its more important specific characters. It may be a new species ; but, in a 

 genus like this, the species of Avliicli are often so difficult to distinguish, 

 even from the very best preserved sjjecimens, it would l)e folly to attemjit 

 to identify our coral with any of the known species, or to name and 

 describe it as new, without better specimens for conqiarison. 



Locality and xiosition. — Three miles south of Pifion Pass, Pinon Range, 



Nevada; Lower Devonian or Upper Silurian. Found associated with 



Spirifer Pifionensis, Atrypa reiicidaris, J^dn>oii(Ua.'' I'ifioiieusis, and fragments 



of a Dalmanites. 



Favosites poLVMOKruA, Golilf. ?, var. 



Plate 2, fig X 

 Calamopora poJymorpha, Goldf. (1820), Petrif. Geim., I, 70, tab. 27.* 



Of this coral, I have seen but the single fragment figured, and this is 

 * For svnonvun', see Edwards and Haiino's Monojjraiih of Fossil Corals. 



