56 G SCIENTIFIC RECORD FOR 1884. 



of North Caroliua aud compares this flora with that of Virginia* in a 

 table, showing also the affinities to Jurassic, Rhaetic, and Triassic plants 

 of foreign countries. This list contains thirty-nine species. Twenty- 

 three per cent, of these are peculiar to North Carolina, 41 per cent, are 

 found in Virginia, 20 per cent, are allied to or identical with Jurassic 

 forms, aud 3S per cent, are allied to or identical with Ehaetic forms, and 

 therefore the North Carolina flora may be considered of the same age as 

 that of Virginia. 



FoED, S. W. — Note on the Discovery of Primordial FossUs in the Town 

 of Stuyvesant, Columbia County, New York. (Amer. Jour. Sci. and 

 Arts, July, 1884, art. vi, vol. xxviii, pp. 35-37.) 

 Mr. Ford considers that the 120 feet of strata he finds in Columbia 



County are simply a southern prolongation of the Troy primordial 



series. 



Hall, James. — Notes on the Family Dictyospongidce. Observations on 

 the Genera Gyathophycus, Bictyophyton, Phragmodictya, Glathrospongia, 

 Physospongittj and their relations to Uphantcenia. (35th Report of the 

 New York State Museum Nat. Hist., pis. xvii-xx.) 

 Plates published in advance : one hundred copies have been distrib- 

 uted. 



Hall, James. — Descriptions of the Species of Fossil Reticulate Sponges, 

 constituting the Family Dictyospongidce, pp. 1-19. Albany, 1884. 

 (Abstract of a pai^er to be issued in the 35th Museum Report.) 

 Contains further description of the forms indicated in the previous 

 title. The new genera Ecteuodictya, Lyrodictya, Thamnodictya, Phrag- 

 modictya, Gleodictya, and Physospongia, are characterized, and the follow- 

 ing new species are described : Bictyophyton hamiltonense, D.patulum, D. 

 prismaticum, B. telum, B. irregulare, B. baculum, B. paralellum, B. cine- 

 turn, B. sacaulum, Ectenodictya burlingtonensis, L-yrodictya romingeri, 

 Phragmodictya patelliformis, Gleodictya gloriosa, G. f mohri, Physospongia 

 colletti. 



Hall, James. — Palaeontology. Vol. v, part 1. Lamellibranchiata I. 



Text and plates. Containing descriptions aud figures of the Mono- 



myaria of the Upper Helderberg, Hamilton, and Chemung Groups. 



(Geological Survey of the State of New York, pp. i-xviii and 1-268. 



Explanation of plates i-xxxiii and Ixxxi-xcii. Albany, 1884.) 



Plates i-xxxiii were published last year in advance ; plates Ixxxi to 



xcii have not yet appeared, and no plates at all are bound in the volume. 



Another volume will appear next year containing the descriptions of 



the remainder of the forms illustrated on plates xxxiv-lxxx, inclusive. 



In this the author proposes to give a resume of all the genera described, 



and, in the same connection, a comparison with genera described in other 



publications, with some notice of the bibliography of this class of fossils 



