THE ILLINOIAN ICE INVASION 335 



yellow weathered gray clay lies below and 45 feet of blue clay is above this bed; 

 both beds are filled with pebbles. 



(4) Three miles below Woodpecker Island and nine miles above the mouth 

 of Opazatika River, there is a bed of lignite, 6 feet thick (diminishing to west- 

 ward) made up of mosses and sticks in shale-like form. A section is shown be- 

 low: 



Hard drab clay, with striated pebbles and boulders 10 feet 



Parti-colored clay, with marine fossils 5 " 



Lignite , 6 " 



Clay and lignite 1 " 



Unstratified drift 40 " 



Depth of section 62 " 



Interglacial strata have been noted in Nova Scotia, 195 but no biotic material 

 has been observed. Three glacial and two interglacial periods are indicated 

 but not named. 



III. Systematic Catalog of the Biota of 

 the Sangamon Interglacial Interval 



PLANTS 



BRYOPHYTA 

 FONTINALACEAE 



Fontinalis species Dichelyma capillateum (L.) Schimp. 



Hypnaceae 

 Sernatophyllum recurvans (Michx.) E. G. Britton 

 Drepanodadus intermedins (Lindb.) Warnst. 

 Hypnnm (?) commutation Hedw. 



Characeae 

 Chara species 



PTERIDOPHYTA 



Equisetaceae 

 Equiselum species 



Lycopodiaceae 

 Lycopodium species 



SPERMATOPHYTA 

 GYMNOSPERMAE 

 Taxaceae 

 Taxus canadensis Marsh Taxus minor (Michx.) Britton 



195 Prest, Proc. and Trans. Nova Scotia Inst. Sci., IX, pp. 158-170. 



