12 FOSSIL MARINE PLANTS LESQUEREUX. 



I am unable to discover in the numerous forms traced in relief upon 

 the three forms described below any features or characters in evidence 

 of their vegetable nature. 



Nos. 37 and 38. — Large fragments of shale covered upon one face by 

 numerous flexuous linear filaments, mixed and curved in divers ways, 

 varying in diameter from 2 to 5""', some half cylindrical, others more 

 flattened, traced in the middle by a depression or narrow channel and 

 on the sides by close, more or less regular wrinkles oblique to the axis. 

 Generally the fragments of these linear bodies, some of them 10 to 12c"i 

 long, have the same size or equal diameter in their whole length ; one 

 of them only seems abruptly narrowed near one of its extremities and 

 there branching at right angles. As the fragments are very numerous, 

 covering the surface in crossing upon each other in many directions, 

 the difference in size, remarked above, may be a mere casual deforma- 

 tion. Their form and distribution correspond to the representation by 

 photography of Cruziana BagnoJensis Moriere, in Delgado's Etude sur 

 les Bilobites, p. 61, pi. xxviii-xxx. In their generalify they represent 

 different forms of Ghrossochorda Scotica Schp., figured in Saporta and 

 Marion's " fiv. Reg. Veg., Cryptogames," p. 81. According to Nathorst 

 they are merely trails of Gasteropods or Annelids, an opinion already 

 admitted by Hall in Palaeontology of New York, vol. ii, pis. xii and 

 XIII, who has figured the same kind of impressions. 



No. '39. — Fragments of linear filiform bodies, much smaller than those 

 of specimens 37 and 38, but of the same external form, much longer, 

 flexuous, turning many times around in the same limited space and 

 passing upon each other without abrupt change of direction. Described 

 as species of Oyrochorta by some authors, they are, still more evidently 

 than the preceding, mere traces of worms or small marine animals. 



No. 40. — A flat-ribbed or striated fragment like those figured as 

 Uophyton Morierei in Saporta et Marion, Op cit., p. 81, fig. B, also figured 

 as Vexillum Morierei Sap., " Organ, problem.," pi. xii, fig. 2. It is upon 

 the same slab as No. 39. appearing like a fragment of foreign material 

 of bark of Calaniites, for example, 2.^'='" broad, Qc" long, raised about 

 2™"' above the surface of the stone. Its upper face is traced length- 

 wise by few straight lines or strife at unequal distances, and by the 

 circular traces of worms or Gyrocliorta mentioned above. 



EXPLANATION OF PLATE. 



Figs. 1, la, Halymemtes Herzeri sp. uov. 

 Figs. 2, 3, Ciflindrifes striatus sp. nov. 

 Figs. 4-9, Physojjhycus bilohatus sp. uov. 



