46 BirrYospoNoiD^ 



following pages that this species represents a distinct type of generic structure 

 and the name Roemerispon^ua is here introduced therefor. The author 

 considere neither the algous nor the spongous nature of these fossils established. 



1884. 



20 Ja>[es Hall. Descrlptimm of tlie Specie^ of B^ohsiI Reticulate Spoiujes^con- 

 stitittliuj tlui Family DictyospomjidcB. (Thirty-fifth Ann. Kept. N; Y. 

 State Mus. Nat. Hist. pp. 465-481, pis. 17 (18)-20 (21).) 



This paper defines the new genera Ectenodictya, Lyrodictya, Thamno- 

 DiCTYA, PiiRAGAioDicTYA (1882), Cleodictya and PiiYsospoNGiA (1882), and 

 gives brief descriptions of all the species known at that time. The following 

 species take date from this publication : Dictyophytoti [Olathrosponyia^ 

 Hamiltonense, D. \IIydriodictya^ patulum, D. [Prismodictya^ prismaticiim, 

 D. [P.] telam, D. [P.] hacidum, D. [P.] paratkhim, D. \^C lathrospongia^ 

 irregalare, D. [^Geratodictya^ cinctuni, 1). \CalathoHpoiujia?\ sacculus, 

 Ecteiwdictya {Lyrodictya ?) Biuiingtonemis, Lyrodictya Romingeri, Phrag- 

 modictya patellifonnis, Oleodictya gloriosa, G. Mohri Pliysospongia 

 Colhtti. 



21. L. LESQUEREtix. Description of the Coal Flora of the Carhoniferous 



Formation in Pennsylvania ami throughout the United States. (Second 

 Geol. Surv. Penn. Kept. P, vol. iii, p. 827.) 



The author, regarding the fossils known as Dictyophyton as marine algae, 

 describes a new form under the name Dictyophyton ramosnm. The species is 

 considered at length in the following pages uuder the name, Botryodictya 

 variwsa. 



1886. 



22. R. P. AVniTFiELD. Notice of a New Fossil Body, prohahly a Sponge 



related to Dictyophyton. (Bull. No. 8, Amer. Mus. Nat. Hist. pp. 346- 

 .348, pi. XXXV, figs. 1-9.) 



Under the generic name Riiombodictyon, are described two species from 

 the Hudson River slates at Kenwood, near Albany, N. Y., of somewhat irreg- 

 ularly globose outline and having a surface marked by parallel raised lines 

 crossed by flexuous obli(pie striae. The general aspect of these fossils 

 suggests their spongous nature, but there is no satisfactory evidence of rela- 

 tionship to the Dictyosponges. 



