NEW FOSSILS OF THE CORNIFEROUS FORMATION BARRIS. 285 



decagonal aspect. This species is readily distinguished from the last by 

 its smaller s-ize, its tendency to a curved outline of plates, the smaller 

 comparative size of its second radials, and its different system of orna- 

 mentation. 



This and the last are found in bed No. 4, which represents a thickness 

 of three to four feet, and is only developed on the west side of the river. 



The original of the specimen figured was presented to the Academy by 

 the writer. 



Megistocrinus nodosus (n. sp.). 



Plate xi, fig. 4. 



Of this Crinoid another specimen has been found (now in the collection 

 of Prof. Pratt], far more perfect than the portion figured, having the 

 dome in excellent condition. The calyx, though preserving well its gen- 

 eral figure, is yet so worn that the lines marking out the plates are not 

 recognizable, yet the nodes are preserved on which the specific character 

 is based. The description then is of necessity limited to the figure. 



Body broadly urnshaped, the three basal plates, firmly united, extend 

 beyond the column, and widen into an hexagonal form, presenting the 

 appearance of a single plate. First radials hexagonal, wider than high, 

 base and upper margins parallel. Second radials hexagonal, higher than 

 the first radials. Third radials heptagoual, higher than first radials ; not 

 as high as the second. Supraradials two, hexagonal, resting on the sloping 

 upper sides of the third radial. On the two supraradials is a second 

 series, wider than high, most probably supporting the arm plates. Be- 

 tween the supraradial series are two smaller plates, one above the other, 

 the lower of which, resting on the notch between the first supraradials, 

 is pentagonal. The first interradials are hexagonal, as large as the third 

 radial. These are succeeded by two others, also hexagonal, and nearly 

 as large as the first interraflial. A third series comprise three smaller, 

 two hexagonal, and one pentagonal ; a fourth and fifth series are small 

 and irregular. Anal side unknown. Dome convex composed of an im- 

 mense number of small, well-defined plates, its lieight about equal to 

 height of calyx. Proboscis sub-central. The peculiarity giving rise to 

 the name is a tendency to nodose development exhibited first on the 

 second radials and first interradials, and drawn out into points in the 

 plates succeeding them. 



Found only in bed, Xo. 4. The original was presented to the Academy 

 by the writer. 



BRACHIOPODA. 



Rhynconella intermedia (n. sp.). 



Plate xi, figs. 5, 6 and 7. 



This shell is of the type of the B. cuboides of European celebrity. It 

 holds an intermediate position between two of the most marked Ameri- 

 can species of that type, E. venustula. Hall, and E. Emmonsi, Hall and 



[Proc. D. A. N. S. Vol. II.] 38 [April, 1879.] 



