FOSSIL PLANTS. 465 



more and more, nearly uniting into one. The whole surface 

 is marked with close, very narrow lines, running in the direc- 

 tion of the twining, and discernible only with a strong glass. 

 The borders are smooth or without any projections. 



On the specimen represented, fig. 12, the spiral lines are erased in the mid- 

 dle of the body, which is there undulately and irregularly wrinkled like the 

 outside of an empty bag. As the form, the distance, and the direction of the spi- 

 ral lines from under the neck and upwards, where they are distinct, are the same, 

 I consider this specimen as representing a modification of this species by age. 



The best specimen found to the present time, of all those referable to this 

 genus, is that represented fig. 10. It was kindly presented to me by Mr. 

 Michael Prendel, of Morris, for whom the species is named. 



It is, like all the others mentioned here below, from the concretions of Ma- 

 zon creek. 



PALyEOXYRIS APPENDICULATA, Sp. nOV. 



PL xxvii, fig. 11. 



BODY spindle-shaped, ovate in the middle, tapering and 

 elongated at both ends, filaments placed at about equal 

 distances from each other, distance averaging the twelfth 

 part of an inch, turning at the middle in a nearly horizontal 

 spiral, descending downwards in a more acute angle, and ab- 

 ruptly terminating above and in ascending, in a concave 

 straight blade, where they become parallel with its borders. 

 On both sides, in the middle of the body, the lamina or sub- 

 stance intermediate to the spiral filaments, protrudes outwards 

 forming irregularly pointed triangular teeth or appendages, 

 which, however, are not marked at some places. This shows 

 them to be the result of a mere mechanical lateral projection, 

 like those which would be produced on its sides by the com- 

 pression of an envelope, either formed of twisted, concave, 

 semi-cylindrical blades, or of a soft bladder, surrounded by 

 strong spiral fibres. Our figure may be represented in a wrong 

 direction, or turned upside down. 

 59 



