I'll", EEDINGS OF TORONTO MEETING. 



"\ \'i« GENERA \M> BPECIES OF Till: FAMILY DICTYOSPONGID-fi. 

 Nl.tt rORMa OF DlCTYOBPONOIDA PROM NIK ROCKS OF l UK (TiKMl MG OROUT. 



11 Y JAMBS HALL. 



[Abstract.] 



Since the publication <»f the preliminary discussions of the genera and Bpecies of 

 this remarkable group of organisms, much additional material of interest has come 

 int'i my hands, largely from the rocks of the Chemung lct< >u j> in Alleghany and ad- 

 joining counties in New York. This formation has already furnished 11 of 

 the genus Dictyophyton, and besides, the curious basket sponge, I a, and 

 probable though incomplete evidences of the genera /' dictya and E 



It i- now necessary to add two new genera to this number, .1 

 and Cryptodictya. The group proposed for discussion in my final work on the 

 reticulate -: ow includes L2 genera and Bub-genera represented, at present, by 



16 g] Of these — 



re from the Utica slate. 

 1 i- " " Hamilton shales. 

 2 l are " " Chemung group. 

 7 " " " Waverly. 

 12 " " other horizons of the lower Carboniferous. 



There are at least twoother Bpecies remaining undcscrihed, and by the end of the 

 • , I expect to record at least 50 species. 



The new Bpecies and genera comprise the following : 



Dietyophyton sceptrum, Bp. n. 

 1 and locality. Chemung group, Alleghany county, N. V. 



/ ' Jyophytc lum, n. Bp. 



/■ Chemung group, Alleghany county, N Y. 



/ Hctyophyto /.' i lalli, Bp. n. 

 / motion and locality. Waverly group, Warren, Pa, 



I > tyophytt • ','■ n. 



/ I locality. Chemung group, Chemung Narrows, N. Y. 



I> iyophyton Amalthea, Bp. n. 

 / Chemung group, Great Bend, Pa. 



/' • (Phragmodictya) Halli, sp. n. 



/ I locality. Chemung group, Alleghany county, M Y. 



/> phyton tomactUutn, -p. n. 

 / Chemung group, Alleghany county, N 5 



A' 1 1 •."!•!' n \ . gen. nov. 

 ■ 

 / I bemung group, Steuben county, N i 



rpTOBii ii \. gen. nov. 



( i -p. n. 



/ I mung gi Liben and Cattaraug tics, N. Y. 



