556 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



EMPERADOR LIMESTONE. 



The type locality of this formation is in Empire village, and sta- 

 tions 6015 and 6016 are on it. As the two localities are very near 

 together, with little or no lithologic or faunal difference, the fossils 

 from the two localities are listed as from one in the following table. 

 The position of the locality is shown on the map (pi. 154). Station 

 6017 is on the highway between Empire and Las Cascadas, about 

 one mile from Las Cascadas. Nos. 6021 and 6673 are for the same 

 locality, which is just north of Caimito switch, Panama Railroad, 

 relocated line; station No. 6024& is on the same railroad, at the 

 lower end of the culvert over Rio Agua Salud. Station No. 6255 

 is on the wagon road about one-half mile south of Miraflores; and 

 station No. 6256 is Bald Hill, 1J miles south of Miraflores (see p. 534 

 for Doctor MacDonald's description of the exposure). 



The fossil plant, Taenioxylon multiradiatum Felix, was obtained 

 at station 6523, which is about 2 miles north of David, where 

 Lepidocyclina macdonaldi Cushman and L. duplicata Cushman were 

 also collected. It is my belief that this specimen did not come from 

 the Emperador limestone; for it is my opinion that the horizon is 

 stratigraphically below the Culebra formation. 



The specific names of the Mollusca and that of the echinoid^ 

 Schizaster scherzeH Gabb, from station No. 6019<7 are taken from 

 the paper by Brown and Pilsbry already cited. 1 Doctor MacDonald 

 and I obtained from the same bed species representing 32 genera 

 of Mollusca, but they have not been identified. 



Regarding the larger Foraminifera from stations 6015 and 6016, 

 Dr. J. A. Cushman says: "The material from No. 6015 contains an 

 orbitoid species, but the sections cut did not clearly reveal the 

 internal structure. It has a papillate surface, and resembles Lepi- 

 docyclina macdonaldi and L. panamensis, but does not seem to be 

 identical with either. Some of its characters, especially in its nearly 

 diamond shaped chambers, it resembles L. vaughani, but the speci- 

 mens of the latter are larger and they are not papillate. Although 

 this appears to be a new species, I do not care to give a name to it 

 without knowing its internal structure in greater detail, and suggest 

 that it be listed as Lepidocyclina species. 



"The material from No. 6016 apparently contains no orbitoids, 

 but it contains Amphistegina, which superficially might be mistaken 

 for an orbitoid." 



Heterosteginoides sp., apparently H. panamensis, occurs at stations 

 Nos. 6015 and 6016. 



Lepidocyclina vaughani Cushman was obtained at two localities, 

 stations Nos. 6021 and 6255. 



i Acad. Nat. Sci. PMa. Proc. for 1912, p. 503. 



