CRETA CEO US FORMA TION ON STA TEN ISLAND. 423 



1 8. Dewalquea Groenlandica Heer. (?) 

 (Plate XXXVI, Fig. 7.) 



Dcivalqiiea Groenlandica Heer. Fl. Foss. Arct., Vol. VI, 

 Abth. II, p. Zj, PI. XXIX, Figs. 18, 19; PL XLII, Figs. 5, 

 6; PI. XLIV, Fig. II ; ibid., Vol. VII, p. 3;, PL LXII, Figs. 

 5,6. 



The reference of our specimen to this species is questionable. 

 Amongst all of Heer's figures the only one with which it can 

 be satisfactorily compared is Fig. 6, PL LXII, above quoted. 

 Nevertheless, as our specimen is apparently identical with those 

 provisionally referred to the species in the Flora of the Amboy 

 Clays (p. 129, PL XLI, Figs. 2, 3, 12), I have thought it 

 best to retain the name. 



Locality : Tottenville, Staten Island. 



19. Tricalycites papyraceus Newb. 



(PL XXXVII, Figs. I, 2.) 



Tricalycites papyraceus Newb., Fl. Amboy Clays, p. 132, PL 

 XLVI, Figs. 30-38. 



Locality : Tottenville, Staten Island. 



20. Rhizomorphs. 

 (PL XXXVIII, Fig. I.) 



I use the term Rhizomorph in the same sense as it was 

 originally used by the late Dr. J. I. Northrop, in describing 

 similar cylindrical structures in the coral rocks on the island of 

 Nassau. (Notes on the Geology of the Bahamas, Trans. N. V. 

 Acad. Sci., Vol. X (1890), p. 16.) It has no connection with 

 the fungus genus RJiizoniorpha. 



Amongst the commonest of the fossil remains found in the 

 hardened clay nodules in the drift at Tottenville are those which 

 I have included under the comprehensive name of Rhizomorphs. 

 They usually consist of limonite tubes, concretionary in struc- 

 ture, sometimes hollow, sometimes containing lignite or pyrite. 

 Occasionally the lignite has no casing of limonite around it. 



