372 L. Lesquereux on the Coal Formations of N. America. 
deprived of the true Pecopterts or of the small forms of the order. 
Alethopteris Serlia Brgt., 1s met in its shales, but is very scarce ; 
the species rather belongs to No. 8. It has Alethopteris marginata 
rgt., not seen in any other horizon ; also Alethopieris levis Lsqx., 
probably peculiar to it, and Alethopieris nervosa Brgt., which as- 
cends higher. Besides the genus Pecopieris Brgt., 1 cannot men- 
tion any species peculiar to this coal. Pecopteris velutina Lsqx., 
a fine species, which by its fructification would be referable to a 
separate genus, was found in its shales; but we have mentioned 
it also with the subconglomerate coal. Pecopteris Miltoni Brgt., 
or P. polymorpha Brgt. (probably the same) is a species found some- 
times in its shales; but it is common in the whole thickness of 
the coal measures. Pecopteris penneformis Brgt., P. Sillimanne 
Brgt., P. plumosa Brgt., P. villosa Brgt., are connected with it, 
but are found still higher in the measures. The fourth character 
of this coal is the great number of species of large Sphenopteridee 
and of Hymenophyllites connected with it. Sphenopteris latifoha 
Brgt., 8. obtusiloba Bret., 8. glandulosa Lsqx., 8. polyphylla Li. and 
Hutt., S. Newberryi Lsqx., 8. artemisiefolia Brgt., with neno- 
phyllites Hildrethi Lsqx., and H. spinosus Gipp., have not been 
hitherto found except with this coal. 
Of the genus Odontopteris Brgt., all the American species are 
connected with No. 1B, except O. crenulata Brgt., which first 
appears in the subconglomerate coal. 
Among the Sigillarv, it has as species peculiar to it, Sigillaria 
stellata Lsqx., 8. Serlii Bret., S. vessellata Bret., S. Brochanti Brgt., 6. 
alveolaris Brgt., S. oculata Brgt., S. polita Lsqx., S. obovata Lsqx., 
S. alternans Ll. and Hutt., S. discoidea Lsqx., and 8. catenulata 
Ll. and Hutt. 
cies, found in the shales of this coal, perhaps only one of the 
numerous forms of N. hirsuta Lsax. 
Connected with this remarkable coal bed, we still find Cor- 
daites borassifolia Ung., and Dictyopteris obliqua Bunby., locally 
distributed ; Whittleseya elegans Newb., formerly described and 
found at one or two pics: only ; species of Asterophyllites, An- 
nularia and Sphenophyllum, but none of them peculiar to it, 
and species of Culamites, especially C, Suckowii Brgt., 0. Cust 
