486 SYSTEMATIC PALEONTOLOGY 



with which it may be compared. ISTamed for Dr. B. L. Miller, who 

 first collected it. 



Occurrence. — Calvert Formation. Good Hope Hill Road. 



Collection. — Maryland Geological Survey. 



Genus PIERIS Don. 

 PlERIS scrobiculata n. sp. 



Description. — Leaf about 1.3 in. long by 0.6 in. wide at middle, 

 ellipsoidal, narrowed to the base and rounded to an obtuse apex, entire; 

 surface thickly punctate or pitted (?); midrib straight; secondary 

 nervation not visible. 



This leaf, represented in the collection by the single specimen figured, 

 was apparently of a coriaceous texture, similar to many of our Erica- 

 ceous shrubs, and it was either rough or beset with hirsute appendages, 

 which have given an appearance of punctation to the surface; or pos- 

 sibly this appearance may be due to the presence of some fungoid growth 

 and not to any character of the leaf. Similar markings on fossil leaves 

 have been described and figured under the genera Sphceria or Sphcerites 

 (8. vaccina Sep., Fl. Foss. d'Aix, pt. i, p. 6, pi. i, fig. 5; S. palceo- 

 lauri, Ett., Foss. Fl. Leoben, pt. i, p. 5 [265], pi. i, fig. 6 etc.) The 

 leaf is similar, in general appearance, to those of the living P. nitida 

 (Bartr) Beuth and Hook. 



Occurrence. — Calvert Formation. Good Hope Hill Eoad. 



Collection. — Maryland Geological Survey. 



Genus PHYLLITES Brongniart. 

 Phyllites sp. (?) 



Desci'iption. — This specimen is too imperfect for either accurate com- 

 parison or adequate description, but the basal characters are so well 

 preserved that it was thought advisable to depict it, pending the possible 

 future discovery of more complete material. 



Occurrence. — Calvert Formation. Good Hope Hill Road. 



Collection. — Maryland Geological Survey. 



