1912.] NATURAL SCIENCES OF PHILADELPHIA. 501 



are here added. In this bed, especially in the part below sea level, 

 the fossils are beautifully preserved, and the fauna, if it ever becomes 

 completely known, will doubtless prove to be a very rich one. We 

 have already discussed its position in the series in the paper noted 

 above. The new species found in this lot are as follows (including 

 3 species of Natica collected by Brown, 1910) : 



Vol vula micratracta n. sp. 



Ringicula hypograpta n. sp. 



Pleurotoma (Gemmula) vaningeni n. sp. 



Drillia enneacyma n. sp. 



Glyphostoma dentiferum Gabb. 



Fasciolaria gorgasiana n. sp. 



Turbonilla bartschiana n. sp. 



Turbonilla gatunensis n. sp. 



Natica bolus n. sp. 



Natica canalizonalis n. sp. 



Natica canrena (Linn.). 



Sigaretus (Eunaticina) gabbi n. sp. 



Pecten (Cyclopecten) oligolepis n. sp. 



Corbula (Cuneocorbula) hexacyma n. sp. 



Echinochama antiquata Dall. 



4. Fossils from the excavation of the Spillway, Gatun Dam. This 

 is in the Gatun Formation, here a rather soft, somewhat lignitic 

 material, largely composed of volcanic ash. Besides the species 

 noted below, it contains fragments of wood, nuts, and other remains 

 of land plants, converted to lignite coal. The list of species ob- 

 served in this Spillway material is as follows: 



Conus concavitectum B. and P. 



Cyprcea henikeni Sowb. 



Turritella altilira Conrad. 



Pecten (Amusium) luna n. sp. 



Pecten (Euvola) reliquus n. sp. 



Cardium (Trachy cardium) dominicense Gabb. 



Cardium durum n. sp. 



Tellina cequiterminata n. sp. 



Dosinia delicatissima n. sp. 



dementia dariena (Conrad). 



Petricola millestriata n. sp. 



Thracia {Cyathodonta) isthmica n. sp. 



Solen near amphistemma Dall. 



5. Fossils from the Cuts along the Relocation of the Panama Rail- 

 road in the Quebrancha Hills, nearly one mile south of Gatun. This 

 is in the Gatun Formation, and Mr. Mac-Donald notes that these 



