28 PALEONTOLOGY. 



not in a very good condition for examination. As nearly as its characters 

 can be made out, it seems to belong to one of the varieties or species 

 usually referred to F. poUjmorplia of Goldfuss. Without more and better 

 specimens, however, it would scarcely be possible to determine its specific 

 relations with exactness. 



Locality and position. — Rio Verde, Arizona ; found by Dr. Palmer 

 associated with CyatJiopliyUiim Palmeri. 



Genus SYRINGOPORA, Goldfuss. 

 Syringopora (uudt. ep.). 



Corallites very slender or only about 0.06 inch in diameter; generally 

 separated by spaces from one to three or four times their own diameter ; 

 usually nearly straight, but sometimes more or less flexuous ; surface with 

 small transverse wrinkles ; connecting tubes distantly separated ; (interior 

 unknown). 



In its general appearance, this coral rather closely resembles 8. perele- 

 gans, Billings (Canadian Journal, March, 1859, fig. 19), and it may possibly 

 belong to that species. As I only know it, however, from imperfect speci- 

 mens, and there are doubtless many closely-allied species of this genus in 

 the rocks of this country, I do not feel warranted in identifying it Avith 

 that described by Mr. Billings, or in naming it as a new species. Its coral- 

 lites are certainly more Avidely separated than in Mr. Billings's typical 

 specimens, and, although this is to a considerable extent a variable charac- 

 ter, I am rather inclined to regard it as a distinct species. 



Locality and position. — Babylon Hill, White Pine Mining District; 



Devonian. 



OYATHOPHYLLIDiE. 



Genus PTYCHOPHYLLUM, E. & H. 

 Ptychophyllum ? iNFUNDiBULUM, Meek. 



Plate 2, figs. 1, 1 a, 1 b. 



Corallum subturbinate, or possibly becoming more or less cylindrical 

 with age ; central fossula moderately deep, truncato-obconic, about one- 

 third the breadth of the entire corallum ; rays stout, about fifty, generally 



