376 



Report of* the State Geologist. 



thus making the upper part of the sponge regularly vase-shaped with a circu 

 lar cross-section. The actual extent of this vase and the precise form of the 

 aperture remain unknown. 



The reticulum is line-meshed throughout and in no place is there evidence 

 of conspicuous reticulating bands, the aspect of the net-work being very 

 similar to that in species of Calathospongia (e. g. C. Jtedjieldi, G. CarUi). 

 The larger quadrules are minutely subdivided and vary in size and form as 

 the curvatures of the surface vary. The fossil is in a sandstone and the 

 spicules are not preserved. 



This magnificent sponge attained commanding dimensions. The best of 

 the specimens, which has lost something from each extremity, has a height of 

 190 mm. It has been somewhat compressed laterally and its greatest width 

 at the lower end is 145 mm. ; its width across the basal nodes is 215 mm. At 

 its narrowest diameter, above the nodes, it measures 120 mm., and at the top 

 about 140 mm. A smaller specimen representing the basal portion only, 

 measures 115 mm. across the row of nodes. 



Locality. From a sandstone of the age of the Keokuk group, overlying 

 the calcareous shales at Crawfordsville, Indiana. (Collection of E. B. Hall.) 



Cleodictta Mohri, Hall. 



Plate lxx, Fig. 3. 



1884. Cleodictya ? Mohri, Hall. Thirty-fifth Ann. Kept. N. Y. State Mus. 

 Nat. Hist., p. 479. 



Sponge elongate, swollen below, broadly constricted and gradually 

 expanding above. The base is broad and the expansion thence to the hori. 



zontal row of nodes is convex and 

 $=* ^ 3 fmJ^ rapid. This expanded portion of 



^ X r ^JjL ^ the sponge is relatively much longer 



T X £^^^^^^^^3 than in other species of the genus, 



^ the nodes themselves being very 

 obscure, elongate and but slightly 

 elevated. Over one portion of the 

 elevation on which they lie, where 



Figure 84. Spicules of CUodictya Mohri. x\±q reticulum is fully preserved, 



1, Group of umbels, x80 ; 2, compound plnulus, x200 ; S, bexacttn 

 surrounded by umbels and fragments of rhabds, x80. (J. M. C. ) they are SCai'Celv dlSCei'lllble. Oil 



the exposed half of the cup there are evidences of four nodes with a possible 

 fifth. Above the nodiferous expansion, the contraction of the cup is gradual 



