362 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



Feet Meters 



In a drift block the following species were found 

 (6iw) : 



Albertella laevis Walcott 

 Agraulos sp. 



LOWER CAMBRIAN 



HoTA Formation 



Massive-bedded arenaceous limestone in great bands of 

 light and dark gray color, with a band of gray, pink- 

 ish-weathering limestone at the top that forms the 

 south slope of the ridge on the north side of Coleman 

 Brook and the southwest spur of Mahto Mountain. . . 800 243.8 



Fauna. — Fragments of Olenellus, etc., were found in the 

 upper layers of the formation on the line of the 

 section. 



At locality (6is), west slope of Mahto Mountain 

 about 300 feet (91 m.) from the top : 



Olenellus canadensis Walcott ' 



At locality (6it), gray siliceous limestone near top 

 of the formation on west slope of Mahto Mountain : 

 Olenellus sp. 

 At locality (6ik), 2.5 miles (4 km.) west of (6it), 

 beneath the north face of Mumm Peak and just above 

 Mural glacier, the following 12 species were found in 

 a band of dark siliceous shale : 

 Cystid ? sp. 



Lingulella chapa Walcott 

 Lingulella hitka Walcott 

 Mickwitsia muralensts Walcott 

 Obolella nuda Walcott 

 Obolella cf. chromatica Billings 

 Hyolithes sp. 



Callazna euc harts Walcott 

 Callavia perfecta Walcott 

 Wanneria occidens Walcott 

 Olenellus truemani Walcott 

 Hymeitocaris sp. 



Mahto Formation * 



Massive-bedded, gray quartzitic sandstones, with thin- 

 bedded, hard sandstones and dirty grayish-brown are- 

 naceous shale in thin bands 1,800 548.7 



This series extends down the northeast face of 

 Mahto Mountain and the slope of Tah Mountain 

 nearly 800 feet (243.8 m.). 



Fauna. — No fossils found. 



