22G DlOTYOSPONGIDyE. 



PLATE XIV. 

 CLATHROSPONGIA, Hall. 



Piige 121. 

 (See Plates XV, XVni, XXI, XXV, XLIX, L.) 



Clathrospongia (?) Hamiltonensis, Hall (sp.). 



Pago 66. 



Figure 1. The original specimen, wliich is a calcareous replacement of the 

 skeleton; showing the strong primary bands and the imperfectly 

 retained lesser bands ; also exhibiting the minute reticulation over 

 small patches near the middle of the surface. 



In the calcareous shales of the Hamilton group. Canandaigua lake, 

 I^ew York. 



Clathrospongia fekestkata, Hall (sp.). 



Pago 122. 

 (See Plate XXV.) 



Figure 2. A view of the original specimen, from the drawing given in the 

 Sixteenth Annual Report of the N. Y. State Cabinet of Natural 

 History, 1863, pi. 3, fig. 4. 

 Chemung group. Chemung narrows^ New York. 



DICTYOSPONGIA, gen. nov. 



Page 72. 

 (See Plate* XV, XVI, XXVII, XXXIII, XXXVI, XXXVIII, XLI, XLII, XLIV, XLVI, LV, LVI, I.XI.) 



Dictyospongia sceptrum, Hall (sp.). 



Pago TJ. 

 (See Plates XV, XVI, XXVJI, XXXVI.) 



Figure 3. A slender, well preserved and nearly entire individual, showing 

 the prevailing form of the species and the elongate rectangular shape 

 of the primary meshes of the net- work. 



Figure 4. A specimen of similar character, but accidentally curved. 

 Chemung group. Friendship, New York. 



Figure 5. A somewhat smaller example preserving the finer divisions of the 

 reticulum. 



Figure 6. Two very small examples regarded as the young of this species. 

 Chemung group. Wellsville, New Yoi-k, 



