a 18 DlOTYOSPONGID^. 



PLATE LX. 



CALATIIOSPONGIA, gen. nov. 



Page 155. 

 (See Plates XLVIII, XLIX, L, LI, LII, LVI, LVII, LXVIII.) 



Calathospongia carcebalis, sp. nov. 



Page 167. 

 (See Plates LI and LII.) 



Figures 1, 2. Opposite sides of a complete specimen, the side represented in 

 fig. 1 having been somewhat abraded. This specimen shows the 

 form of the entire sponge from aperture to base, the abrupt trunca- 

 tion of the latter, without evidence of basal disc, the stout body and 

 gradual expansion t()\vard the summit. The major quadrules of 

 the reticulum are somewhat less conspicuous than those on the speci- 

 mens from the Waverly sandstone represented on Plates li and lii, 

 but this difference is largely due to the mode of preservation. 

 Keokuk group. Ci'awfordsville, Indiana. 



ACLCEODICTYA, gen. nov. 



Page 177. 

 (See Plates LIV, LV, LXI, LXVIII.) 



ACLCEODICTYA MARSIPUS, Sp. JIOV. 



Page 178. 



(See Plates LV, LXI, LXVIII.) 



Figure 3. Latei-al aspect of an incomplete specimen showing a coarsely 

 reticulated surface and the deep basal obcone with its somewhat 

 irregular reticulation. 



Figure 4. Side view of a small and somewhat distorted specimen with a 

 finer reticulation. 



Figure 5. An entire individual, showing a very stout siibcylindrical cup with 

 a coarse, square reticulation. The basal obcone is relatively deep, 

 forming a very obtuse angle with the walls of the sponge, and shows 

 the absence of any peripheral fringe and also the irregular converg- 

 ence and intersection of the radial bands. 

 Keokuk group. Indian Greek, Indiana. 



