24. CONTRIBUTION TO 



CLADOPORA INTERMEDIA, N. Sp. 



Plate 9, Fig. 2. 



Undose laminar expansion, composed of thin, slightly flattened, radiating 

 tabules, intimately joined at their margins, forming a thin, wrinkled epithecal 

 crust, covering the entire under surface. Tubes with moderately thick walls, 

 smooth, oblique. With dilated orifices, from one to two millimeters wide, and 

 one millimeter, more or less, in height. Pores very small, and not very numer- 

 ous. Tabulffi not visible in any of the examples examined. Surface very no- 

 dose. 



This is an intermediate species between C. Gurleyi, of the same plate, and 

 C. Winchellana, of (S. A. Miller). The thin undose expansion, and nodose sur- 

 face, with oblique, dilated orifices, makes this easily recognized from all other 

 species. 



Found in the lower Devonian (Corniferous group), at the Falls of the Ohio. 

 Now in the collection of the author. 



BLOTHROPHYLLUM BUCCULENTUM, N. Sp, 



Plate 9, Fig. 3-4-5. 



Corallum simple, elongate turbinate, or sub-cylindrical, straight, or slightly 

 curved with sharp constrictions, and numerous annulations, caused by intermit- 

 tant growth. Height varying in different individuals, from twenty-five to sixty 

 millimeters, or more. Diameter of calix twenty millimeters. Depth ten mil- 

 limeters. A flat space in the bottom of the calix, occupied by the tabula?, eight 

 or ten millimeters in diameter. Number of lamella seventy or eighty, alternat- 

 ing in size, and length, gradually sloping to the bottom of the calix, where the 

 short ones terminate, the longer ones are elevated, sharp and extend to near the 

 center of the calix, leaving a smooth flat space, from three to five millimeters in 

 diameter. Fossette consists of a slight depression in the bottom of the cup, but 

 disappears before reaching the margin of the calix. 



Found in the upper Devonian (Hamilton group), two miles north-west of 

 Charlestown, Indiana. Now in the collection of the author. 



BLOTHROPHYLLUM CONIGERUM, N. Sp. 



Plate 9, FiGS. 6-7-8. 



Corallum simple, elongate, turbinate, or cylindrical, straight or curved. 

 Acute at the base of attachment. Gradually expanding to the calix. Exterior 

 with constrictions, and annulations, caused by intermittant growth. Height of 

 longest corallum seventy-five millimeters. Depth eight millimeters. Number of 



