3U CONTRIBUTION TO 



CYSTIPHYLLUM PARASITICUM, N. Sp. 



Plate 12. Figs. 7-8-9. 



Corallum simple, oblique, subturbinate, straight, or flexuous. With a 

 broad scar at the base, or in some examples they are acute at the base of attach- 

 ment. With root like processes that serve for attachment and support. Ex- 

 amples with broad bases, rarely exceed three or four millimeters in height on 

 the anterior side, posterior side, from one to two millimeters. Diameter of 

 some corallums is essentially the same throughout; in other examples, especially 

 those having acute bases, are from two to five millimeters in height, rapidly 

 expanding in diameter to the calix. Calix oblique, from two to five millimeters 

 in diameter, varying in different individuals. Depth about equal the diameter 

 in the same corallum. In the bottom of the calix, there is from one to five cysts 

 somewhat large and oval, and in some others they are on the sides, and near the 

 margin of the calix. Near the margin of the cup, when not interrupted by the 

 cysts, fine septa, scarcely more than rudimentary, may be observed. Exterior 

 of well preserved specimens have a strong wrinkled epitheca, and fine distinct 

 longitudinal stria?. 



These are found single, or in great numbers, attached to Favosites Za- 

 phrentis, and fragments of other marine organisms. 



Found in the middle Devonian (upper Helderberg group), at the Falls of 

 the Ohio. Now in the collection of the author. 



CYSTIPHYLLLUM INFUNDIBULIFORMIS, N. Sp. 



Plate 12. Fig. 10-11-12. 



Corallum small, simple, turbinate, increasing by proliferous growth. Acute 

 at the base of attachment. Usually straight, or slightly curved. Height vary- 

 ing in different individuals, from twenty to fifty millimeters. Calix oblique, 

 from ten to fifteen millimeters in diameter. Depth ten millimeters. Exterior 

 with sharp constriction. When decorticated it has the appearance of thin, 

 invaginated funnel-shaped cups. At the margin of the cup, fine septa is ob- 

 served, and the cysts are faintly indicated. As they approach the center of the 

 calix, the cysts become larger, and more numerous, leaving no trace of septa. 

 On the exterior the cysts are unequal in size, and not so large as those in the 

 calix. 



The thin, oblique, funnel-shaped, invaginated cups, makes this easily recog- 

 nized from all other species. 



Found in the middle Devonian (upper Helderberg group), Falls of the 

 Ohio. Now in the collection of the author. 



