138 REPORTS ON THE STATE OF SCIENCE.—1912. $ 
T recognise Lingulella, Aerotrela, Hyolithus, and THyolithellus’; at 
38 yards a bed of hard ringing sandstone is seen; at 50 yards a thick bed 
of pebbly grit (6 or 8 feet seen) occurs in the bank. The shales with the 
hard grit bands and the fossils almost certainly belong to the zone which 
I have previously called Quarry Ridge Shales, but the systematic 
position of the thick grit remains to be determined. 
Excavation No. 47, Comley Brook. 
On clearing out the bottom of the Brook to the south-east of the fence 
to Dairy Hill, green sandstones or sandy shale were met with almost 
continuously for about 90 yards, but, owing to the fact that the stream is 
almost parallel to the strike, no detailed section of the beds can be 
measured ; they are therefore given in the table below as they occur in 
horizontal plan. The strike is generally north-west and south-east 
and the dip south-west, but there are slight variations from these direc- 
tions, showing that the beds are not steady. 
Distances from | teneral characters of the rock beds Rock Groups to which 
the fence in yards and their fossil contents | the beds are referred 
| From 0 to 6. Shale with hard ringing grit-bands | Quarry Ridge Shales 
(Middle Cam- 
brian). 
Av 6": : . A north and south fault, cuts the beds 
obliquely 
| At 7. >.  . | Rather soft green sandstone 
From 9 to 10 . | Similar sandstone with many fossils :— 
| Callavia Callavei (Lapworth) 
| CG. Cobboldi (Raw MS.) 
| Wanneria (2), sp. 
Microdiscus, sp., cf. M. Helena (Walcot) 
Ptychoparia (?) attleborensis (S. and F.) 
Hyolithus (Orthotheca), sp. 
Stenotheca, sp., cf. S. rugosa (Hall) 
Kutorgina cingulata (Billings) ? 
Tinnarssonia, sp. 
| | An orthid Lower Comley 
From 10 to 28 | No solid rock seen j Sandstone | 
From 28 to 30 | Red and green sandy shale, reminis- (Lower Cambrian). 
| cent of that immediately below the 
| |  Olenellus-Limestone of the Quarry 
From 30 to 67 | Green sandstone and shaly sandstone 
| of varying degrees of hardness, 
| | with occasional tracks or burrows 
| of organisms and also with dark | 
| 
| calcareous nodules at distances 49 
| and 67 yards 
From 67 to 90 No rock seen | 
From 90 to 93 , Green sandstone and shaly sandstone, | | 
dipping 45° westerly | 
The fault at six yards, running obliquely across the bed of the Brook, 
is very distinct, the shale and green sandstone heing seen in actual 
contact. 
‘1 Tuse the term Hyolithellus for certain straight tubes of circular section com- 
parable with H. micans Billings, which are of frequent occurrence in both the Lower 
and Middle Cambrian beds of Comley. 
