44 DlCTYOSPONOID^.. 



the same time setting forth the a priori evidence against their supposed 

 vegetable nature. 



10. K. 1*. WiiiTFiKLD. On ilie Nature of Dictyophytan. (Amer. Jouru. 



Science, vol. xxii, p. 132.) 



Briefly refers to additional evidence of the spongous nature of these fos- 

 sils, based upon a specimen from the Keokuk beds at Crawfordsville, Indiana, 

 for which the name of Uphantwnia Dawsoni is introduced. The specimen 

 was referred to Dr. J. W. Dawson for examination. 



11. J. W. Dawson. Note on tli€ Structure of a specimen of UphantcBnia, 



from tlie Collection of the American Mnsetim of Natural History, New 

 Yorh City. (Amer. Journ. Science, vol. xxii, pp. 132, 133.) 



This examination of a pyritized specimen from Crawfordsville, leads the 

 author to conclude that it is probably a sponge 



1882. 



12. Ward's Natural Science Bulletin, vol 1, No. l,p. 5. 



Gives a notice of the finding of \he colony oi J) ictyophyton {Hydnoceras) 

 tuherosum, Conrad, in the town of Cohocton, Steuben county, N. Y. 



13 James Hall. Notes on the Family Dictyospongi[(r\w, plates 17—20, 

 with explanations. (Issued in advance of the Thirty-fifth Annual 

 Report N. Y. State Museum of Natural History, 1884.) 



The explanations accompanying these plates differ in some respects from 

 those in the final form of. the paper in the matter of generic identifications. 

 The following species take date from this publication : Dictyophyton 

 [^Ectenodictya^ implexum., Clathrospongia abacus, Dictyophyton \Tylodictya7\ 

 tenue, Plirafjmodictya [Aclceodictya^ excentrica, P. scyphus {=P. catilliformis, 

 Whitfield), Physospongia alternata, Phragmodictya [ lliysanodictya'] expansa^ 

 P. Grebristriata, P. lineata. 



14. R. P. Whitfield. Pemarhs on Dictyophyton and Descriptions of New 

 Species of allied forms from ilis Keokuk beds of Crawfordsville, Indiana. 

 CBuU. No. I, Amer. Mus. Nat. Hist. pp. 10-20, pis. iii, iv.) 



Reproduces the substance of observations made by the author and Princ. 

 Dawson (Nos. 9, 10, 11), redescribes TJphantoenia \Physospongici\ Dawsoni 

 and gives the first descriptions of Dictyophyton [^Phragmodictya] catilliform^ 

 and D. \Dictyospongia~\ cylindricum, all from the Keokuk group of Indiana 



