FOSSIL PLANTS. 463 



of inflation or convexity, surrounded by a flattened border, 

 resembling an endocarp and its exocarp. This form may be 

 merely casual. 



Morris and Murphysborough ; abundant in the shales over the coal. 



CARPOLITHES BULLATUS, Sp. nov. 



PI. xxxi, fig. 22 to 24. 



AN agglomeration of oval or round, small, wrinkled seeds, 

 resembling vesicular spores, all nearly of the same size. Like 

 the former, they appear to have been of a soft vesicular tex- 

 ture Fig. 24 shows them enlarged. 



In concretions from Mazon creek. 



The surface of the stone transversely cut, is covered with them. 



SIGILLARLE ? SfiMiNA, (Seeds of Sigillaria?). 



PL xxxi, fig. 25, and 25a. 



The concretions of Mazon creek contain agglomerations of small seeds, 

 united into cylindrical-ovate clusters, about one inch long, nearly half an inch 

 broad, obtuse at both ends, without trace of any common receptacle to which 

 they might be attached. These seeds are rounded upwards, triangular and taper- 

 ing to a point downwards, as seen in fig. 25, enlarged five times. The space 

 which contains these seeds in the middle of nodules, is filled with a calcareous, 

 white compound, in which the yellowish brown seeds are imbedded without 

 any apparent regular order. 



On the shales at Morris, where clusters of the same kind have also been ob- 

 served, the agglomerations are flattened in irregular round patches, about one 

 inch in diameter, no more than half a line broad. Though these seeds, by their 

 form and size, are similar to those which have been figured by Goldenberg in 

 his Fl. Sarr., 2, pi. 10, fig. 1 and 2, as seeds of Sigillaria^ and also to those re- 

 marked under the scales of true cones of Sigillaria found in Ohio by Dr. New- 

 berry, their generic relation is still uncertain. They are evidently referable to 

 some species of the family of the Selaginese. 



Collected by Mr. Jos. Even. 



