INDIANA PALEONTOLOGY. i30. 



MICHELINIA WARDI,N. Sp. 



Plate 37. Figs. 1, 2, 3. 



Corallum composite, somewhat thin, often attaining a diameter of seven or 

 eight inches, and a thickness from one to two inches, or slightly more. Exam- 

 ples are occasionally found somewhat convex, or discoid, or sub-hemispherical. 

 With diverging prostrate tubes, intimately connected by their epithecal walls, 

 forming a strong, wrinkled epithecal crust, on the under basal side. Tubes 

 rounded-polygonal from two to three millimeters in diameter. In examples 

 with rounded tubes they become free a short distance from the margin ; the 

 free ends have numerous fine but conspicuous annular rings, and numerous fine 

 longitudinal striio; many of the tubes are contracted at the ends, giving to the 

 corallum the appearance of a syringopora. Examples with tubes joining in 

 polygonal outline, have dilated orifices. Pores moderately small, not numer- 

 ous, dispersed without any system of regularity. Tabular flat, concave, or ob- 

 lique, very numerous and closely arranged. Lineal furrows fine, and numerous, 

 not so strongly pronounced as in other forms of Michelinia. 



The specific name is in honor of Prof. Henry A. Ward, the well known col- 

 lector and Palaeontologist, of Rochester, New York. 



Found in the Upper Devonian (Hamilton group) in the strippings above 

 the cement beds, throughout Clark county, Indiana. Now in the collection of 

 the author. 



CHONOPHYLLUM PYGM.EUM, N. Sp. 



Plate 37. Fi(5. 4. 



.Corallum small, simple, turbinate, straight or regularly curved. Acute at 

 the base of attachment. Height thirty-five millimeters. Calix shallow, twenty- 

 five millimeters in diameter. Depth ten millimeters. Number of lamella?, one 

 hundred, in the circumference of a calix twenty-five millimeters in diameter, 

 thin and equal in size at the margin, alternating below, the short ones about 

 five millimeters long, the longer ones continue to the center of the calix. coalesc- 

 ing, and intimately touching those from the opposite side, and abruptly termi- 

 nate. A portion of the exterior has a thin, smooth, epithecal crust, with num- 

 erous wrinkles and sharp constrictions, giving to the coralhim the appearance 

 of a series of thin invaginated cups. No fossette. 



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

 Now in the collection of the author. 



