Yol. 62.] THE HIGHEST SILURIAN OE THE LUDLOW DISTRICT. 217 



they contain numerous specimens of Lingula minima, while Leper- 

 dilia marginata and various seed-like bodies are also found. These 

 massive sandstones pass up into others chiefly distinguished by 

 their more regular and closer bedding, smaller number of Lingulce, 

 and abundant carbonaceous remains. These and the succeeding 

 division are markedly current-bedded. The carbonaceous remains 

 become rarer in the higher beds, and the bedding becomes thinner, so 

 that the highest sandstones are uniformly thinly-bedded, extremely- 

 micaceous sandstones, with but few traces of life except in the 

 peculiar bed that we have distinguished as the Fish-Bed. 



This Fish-Bed occurs about 12 feet down, and is well seen in 

 the western face of the quarry : it is a coarsely-micaceous friable 

 sandstone, full of fish- fragments, which show especially clearly on 

 the weathered surface. It varies both in texture and thickness 

 within short distances, and in this respect agrees closely with the 

 various Bone-Beds of the Series. It does not seem to be present 

 everywhere over the area, but wherever we have detected it, it 

 occupied approximately this same horizon. 



The fish-remains collected from this bed were unfortunately very 

 fragmentary and badly preserved. Our debt therefore is all the 

 greater to Dr. Traquair and Dr. Smith Woodward for their kindness 

 in examining them for us. They report that most of the fish-remains 

 are broken-off cornua of the Cephalaspid Eukeraspis pustulifera, 

 Agassiz, while a few are fragmentary spines referable to the 

 Acanthodian genus Climatius. 



Continuing in a north-easterly direction along Norton Lane, we 

 find the next exposure about 80 yards farther up on the east side of 

 the road in the ditch, where the rubbly shales (F a) are seen ; they 

 are precisely like their equivalents in the Tin-Mill Wood, and must 

 be those immediately overlying the highest beds of the Downton- 

 Castle Sandstones. 



About 300 yards farther up the lane, just before it turns abruptly 

 to the left, is the beginning of one of Marston's typical sections. 

 The Temeside Shales are seen on both sides of the road, and although 

 somewhat overgrown, the section is more or less continuous, and 

 affords an excellent opportunity for studying the succession, which 

 appears to be as follows (cf. vertical section, fig. 10, p. 216) : — 



The lowest beds seen are the variegated rubbly shales (F a), 

 15 feet of which are exposed : among these may be noted a con- 

 spicuous red shale-band, 2 feet above road-level, and a Lingula- 

 band 1 foot above the shale-band. The hard grey grit (F b) forms 

 a conspicuous ledge all along the section on both sides of the road ; 

 the succeeding olive shales (F c) are considerably thicker than their 

 equivalents in the Tin-Mill Wood ; and the Temeside Bone-Bed is 

 found well up in them. This bone-bed is perhaps less clearly defined 

 than usual, consisting of two distinctly ' bony ' layers, with bony 

 fragments in the intervening shale as well ; probably the three layers 

 should be regarded as the equivalent of F d elsewhere. Numerous 

 fossils have been obtained at this locality (see lists, pp. 219-20). 



The greater thickness of the higher beds of the olive shales 



