558 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



FOSSILS FROM THE EMPERADOR LIMESTONE — Continued. 



6015, 

 6016 



6017 



58666. 

 6019^ 

 6671 



6021, 

 6673 



60246 



6255 



6256 



ECHINOIDEA. 



Clypeaster lanceolat,us Cotteau... 



gatuni Jackson 



Echinolampas semiorbis Guppy. 

 Schizaster scherzeri Gabb 



Holoporetta albirostris (Smitt) 



Ogivalina mutabilis Canu and Bassler . 



MOLLUSCA. 



Murex (Phyllonotus) gatunensis Brown and Pilsbry 



Orthaulax sp 



Pyrula micronemalica Brown and Pilsbry 



A rca sp 



Ostrea gatunensis Brown and Pilsbry 



Pecten (Aejuipecten) oxygonum candlis Brown and Pilsbry. 



sp 



Amusium sol Brown and Pilsbry 



sp 



sp 



Tellina vetula Brown and Pilsbry 



Semele chivolana Dall 



Chione (Lirophora) ulocyma Dall 



Dosinia delicatissima Brown and Pilsbry 



Crassalillites mediamericana Brown and Pilsbry 



Kuphus incrassatus Gabb 



CRUSTACEA. 



MacrobracMum, sp 



Callianassa tenuis Rathban 



Mursia macdonaldi Rathban 



Parthewpe panamensis Rathban . 



CAIMITO FORMATION. 



No fossils were obtained in this formation at its type locality. 

 Doctor MacDonald collected fossil plants at station No. 6840, about 

 7 miles northeast of Bejuca, near Chame, Panama, in a yellowish, 

 argillaceous sandstone that seems to overlap agglomerates and is 

 believed to represent the Caimito formation. Professor Berry records 

 the following species from this locality: 



Guatteria culebrensis Berry, also Culebra and Gatun formations. 



Hiraea oligocaenica Berry. 



Hieronymia leTimanni Berry. 



ScJimidelia bejucensis Berry, also Culebra formation. 



As two of the four species also occur in the Culebra formation, it 

 appears that the deposit in which they were obtained is in age near 

 the Culebra formation. 



Miocene. 



GATUN FORMATION. 



The principal collections from the Gatun formation were made 

 jointly by Doctor MacDonald and myself at stations Nos. 6029a-6, 

 0030, 60336-c, 6035, and 6036, the position of each of which is platted 

 on the map (pi. 154), and the sections are described in Doctor Mac- 



