THE FOSSIL CRINOID GENUS DOLATOCRINUS AND ITS ALLIES. 57 



DOLATOCRINUS FUNGIFERUS Rowley. 



Plate 15, figs. 12, 13. 



Dolatocrinus fungiferus Rowley in Greene, Contr. Indiana Paleontology, 1903, 

 p. 134, pi. 39, figs. 1-3. 



Of the type of D. nodosns, 'out distinguished from that species 

 and all others of the genus by having the tegmen studded with 

 short, thick, mushroom-shaped spines, which project like nail heads. 

 It is a thoroughly well-marked species, not depending upon the 

 evidence of a single type, for I have seven specimens in which the 

 peculiar spines and correlated characters are constant; but the num- 

 ber of arms varies from 17 to 19. Rowley's figures give a very 

 good picture of the species. The description gives the horizon as 

 "Middle Devonian," which was Rowley's term for the Onondaga 

 beds at Louisville, while he called the Hamilton "Upper Devonian." 

 This was an oversight by Mr. Greene, as this form is typically Ham- 

 ilton, and all my specimens, most of which were collected by him, 

 are from above the hydraulic beds. 



Horizon and ZocaZi^y.— Hamilton (Sellersburg) limestone: Louis- 

 ville, Kentucky, and vicinity. 



The final result of our review of the species and varieties of Dolato- 

 crinus heretofore described, with the few new species added, may be 

 shown by the following summary: 



Species and varieties of Dolatocrinus. 



