68 DlOTYOSPONGID^. 



The two wood-cuts of this fossil given by Roemek and reproduced here, 

 show very clearly the structure described. The original cuts also indicate 

 distinctly an important character which the author does not mention, namely, 

 the convexity of each of the non-reticulate rectangular areas, which we 

 presume to be of a similar character to the surface nodes in Piiysospongia. 

 The relation of the fossil to the latter genus is also seen in the relatively 

 great size and mode of reticulation of the spicular bundles, while a generic 

 difference in the two is found in the single vertical rows of quadrules, 

 their increase by intercalation and in the convexity of all the quadrules 

 in RoEMEKispoNGiA, even in those of irregular shape over the early portion 

 of the cup. 



Geological horizon. From the Calceola-shales, Gerolstein (middle 

 Devonian). 



Professor Clemens Sciilutee has described under the name Protospoiujia 

 rJienana, a Dictyosponge from the Hunsriick slates (lower Devonian), of 

 Gemiinden, Germany.* The original specimen is a mere fragment of a veiy 

 coarse-meshed sponge whose generic characters are entirely uncertain. 



SPECIES OF THE PORTAGE GROUP. 



DICTYOSPONGIA, gen. nov. 

 (For description see page 72.) 



DiCTYOSPONGIA HAPLEA, Sp. nOV. 

 Plate xxxiii, Fig. 1. 



A small species of this genus is indicated by two specimens showing a 

 smooth, regularly expanding, subcylindrical cup with a very fine reticulum. 

 One of these specimens exhibits only the apical portion ; the other represents 

 nearly the entire length of the cup, has a diameter rather more than one-third 

 of the length and is slightly contracted about the aperture. No trace of pris- 

 matic faces is preserved. This entire specimen measures 40 mm. in length, 14 

 mm. in greatest width and 11 mm. in width at the aperture. 



Locality. In the sandstones of the Portage group ; second falls of the 

 Tannery gully, Naples, N. Y. (Collected by D. D. Luther.) 



Zeitscbr. der Deutsch. Geolog. Gesellsoh. vol. 4*, p. 615, 1892, 



