Fossil Reticulate Sponges. 479 



Cleodictya glokiosa, n. sp. 



Frond large, urn-shaped, rotund below and tapering toward the 

 base, ventricose above, and the prominent portion of the periphery 

 ornamented by large rounded nodes. Frond contracting abruptly 

 above the nodes and continuing in a subcylindrical form, which 

 gradually expands above. Entire form unknown. 



Frond composed of reticulate tissue. The stronger vertical and 

 transverse striae are somewhat irregularly disposed, owing to the in- 

 equality of the surface, but including between them quadrules of 

 finer tissue. 



A large imperfect frond has a height of 200 mm., a greatest diame- 

 ter measuring across the nodose periphery of 220 mm., the transverse 

 diameter in the same plane is about 135 mm., the difference being due 

 to compression. At the constriction above the nodes the diameters 

 are respectively 70 and 130 mm. The transverse section was originally 

 circular. A section of a smaller specimen, or of a continuation of 

 the tube at a higher point, is nearly circular, having one diameter 110 

 mm. and the other 115 mm., to the periphery formed by the nodes, 

 while the continuation of the tube above measures 65 mm. by 70 mm. 



This is a most remarkable species, varying, both in its general form 

 and magnitude, and in the development of its twelve peripheral nodes, 

 from any known form of this family. 



. Formation and locality. In a sandstone which comes above the 

 shaly beds, at Orawfordsville, Ind., of the age of the Lower Carbonif- 

 erous limestones. 



Cleodictya ? Mohri, n. sp. 



Cup ventricose below, cylindrical and gently contracted in the mid- 

 dle, somewhat spreading toward the aperture ; length more than twice 

 the diameter through the middle of its extent. Base unknown. 



Surface finely reticulate, with stronger longitudinal and transverse 

 striae at intervals of three to five mm. The inflated portion below the 

 middle presents several broad low bullae. 



The specimen described, which is imperfect at both extremities, has 

 a length of 140 mm., the diameter in the middle of its length is 

 65 mm., the diameter in the ventricose portion is nearly 100 mm., 

 and at the other extremity about 75 mm. 



Formation and locality. In the calcareous shale of the age of the 

 Keokuk limestone ; Crawfordsville, Ind. 



Physospougia Dawsoni. 



Plate 20, Figs. 4^6, 8. 



Uphantcenia Dawsoni, Whitfield. Bull. No. 1, Am. Mus. Nat. Hist, p. 15, 



pi. 4, figs. 1, 2. 1881. 

 Uphantcenia Dawsoni, Whitfield. Am. Jour. Sci., August, 1881. 

 Physospongia Dawsoni (Whitfield), Hall. Notes on the Family Dictyospon- 



gidse; prelim, for the 35th Rept., pi. 19, figs. 4-8. 1882. 



Cup subcylindrical or gradually expanding above. The entire form 

 is unknown. Base unknown. 



