GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 127 



Station 588%i. Costa Kica. Banana River; eighth fossiliferous 

 zone below the uppermost one of the section. Probably equivalent 

 to Gatun formation. Miocene series. Collector, D. F. MacDonald; 

 1911. Callinectes declivis Rathbun. 



Station 5882h. Costa Rica. Banana River; seventh fossiliferous 

 zone below the uppermost one of the section. Probably equivalent to 

 Gatun formation. Miocene series. Collector. D. F. MacDonald; 

 1911. Leucosilia bananensis Rathbun. 



Station 5882g. Costa Rica. Banana River; sixth fossiliferous 

 zone below the uppermost one of the section. Probably equivalent to 

 Gatun formation. Miocene series. Collector. D. F. MacDonald; 

 1911. Leucosilia bananensis Rathbun. 



Station 588% f. Costa Rica. Banana River: fifth fossiliferous 

 zone below the uppermost one of the section. Probably equivalent to 

 Gatun formation. Miocene series. Collector, D. F. MacDonald; 

 1911. Leucosilia bananensis Rathbun. 



Catalogue No. 321$87, U.S.N.M.Cost& Rica. Moin Hill, near 

 Limon. Probably equivalent to Gatun formation. Miocene series. 

 Collector, H. Pittier. Callianassa moinensis Rathbun. 



Station oSSJfd. Costa Rica. Moin Hill; third fossiliferous zone 

 below the uppermost; just above level of the rails in railway cut. 

 Probably equivalent to Gatun formation. Miocene series. Col- 

 lector, D. F. MacDonald; 1911. Callianassa moinensis Rathbun. 



Station 5906a. Panama Canal Zone. Chagres River, 50 to 75 feet 

 below those of (17c) "5905" in lighter colored limestone according 

 to incomplete evidence. Pliocene series. Collector, D. F. Mac- 

 Donald; May, 1911. Balanus glyptopoma Pilsbry. 



Station 5903. Panama Canal Zone. From across Chagres River 

 and probably 220 to 225 feet above level of river, top of hill opposite 

 Alhajuela. Gray tufaceous limestone. Pliocene series. Collector. 

 D. F. MacDonald; May, 1911. Balanus glyptopoma Pilsbry. 



Station 4269. Costa Rica. City of Port Limon. Port Limon 

 formation. Pliocene series. Collector, Dr. L. A. Wailes. Pa- 

 chycheles lotus Rathbun. Petrolisthes avitus Rathbun. Calappa 

 costaricana Rathbun. Heteractaea lunata (Milne Edwards and 

 Lucas). Cardisoma guanhumi Latreille. 



Station 5886. Mexico. From the Sayula District of Chiapas. 

 On the Arroyo Chapapoapam. Pliocene series. Collectors, Dr. 

 C. W. Hayes and others, 1911. Balanus glyptopoma Pilsbry. 



Station 6038. Panama Canal Zone. From black mud from lower 

 end of Gatun Locks. Pleistocene series. Collector, D. F. MacDon- 

 ald; 1911. Balanus eburneus Gould. 



