ADDITIONAL SPECIES EEPORTED EROM MISSOURI. 279 



more lanceolate pinnules of N. Sclieuchzeri Hotfui.; (4) OdotUoj)teris lietero- 

 phylla^ which represents probably bnt heteroniorphous pinnules of the same 

 type of Neurojjtcris, and (p) Ithaco2iJiyUu)iiJii>iibriafuiii, a wholh' obscure and 

 equivocal species. Nowhere in the writings of Professor Lesqiiereux have I 

 found any other mention than that cited above of a Lexyidophylliiin [or 

 Lepidostrobus] minus. In Hanibach's list, referred to below, it is credited to 

 Lesquereux. It is not likely to be Schenk's L. minus,^ for I can find no 

 evidence that the publication of the latter was known to Professor Lesquereux 

 at the time of the completion of the Coal Flora. The Sigillaria reniformis of 

 the list is of too little value or importance as a species to merit any further 

 consideration. 



If we accordingly exclude the somewhat doubtful records just passed 

 in re"\aew we shall have left, unaccounted for, species as follows: 



CkdUpteridium. Oivenit Lx. , Ps. MJimunni (Broiign.) Lx. 



Neuropteris flexuoga Stb. 8ifjillaria Menard il Broiign. 



N. Loschii Bi'ongu. 8. sculpta Lx. 



Odontopteris subcremdata Lx. S. sptnidosa Genu. 

 Pseudopecopteris macilenta (L. aud H.) Lx. 



It is appropriate in this place to consider l^i-iefly a few points relating 

 to both the affinities and the geologic occurrence of these species. 



Ccdlipteridmm Oiuenii is a species in g-eneral characteristic of the upper 

 part, or Sewanee group, of the Pottsville series; and I have not yet seen it 

 from the Lower Coal Measiu'es. 



As generally differentiated in our American collections, Neuropteris 

 flextiosa and N. Loschii extend throughout the Coal Measures, but the plant 

 most commonly found under the latter name is indistinguishable from Hoff- 

 mann's N. ovata, and should be so designated. Pseudopecopteyis macilenta, as 

 at present exemplified in our collections, includes two very distinct types, 

 one of which, from the higher coals, is similar to the species of Lindley 

 and Hutton, while the other, from the upper beds of the Pottsville series, 

 passes by transition into the form described as Pseudopecopteris decipiens Lx. 

 It is uncertain which of these two types is meant in the above list. Odon- 

 topteris subcremdata and Pseudopecopteris SiUimanni are both rare species, 

 and are closely identified with the Mammoth vein in the Southern Anthra- 

 cite field. Sigillaria Menardi, S. sculpta, and 8. spinulosa, the remaining 



>In Richthofen's "China:" vol. iv, 1883, p. 219, pi. xlii, fig. 1.3. 



