[116] 



Selectet) IRotee from tbe Societi^'e 

 mote^Booke. 



GEOLOGICAL. 



Section from the Ludlow Bone-Bed.— This bed was first dis- 

 covered in 1840 by the late Sir R. Murchison, near the town of 

 Ludlow, in Shropshire, where it consists of a single thin layer, some 

 seven or eight inches thick, of brown bony fragments ; it is found 

 lying near the junction of the Ludlow Rocks and the Old Red 

 Sandstone. 



The Ludlow Rocks form the higher series of the upper Silurian 

 formation, and consist of finely laminated sandstone upper beds, 

 and shaley mixed limestone lower beds. 



On examining the section of this rock with the i-in, objective, 

 a confused mass of bony matter meets the eye, which on closer 

 inspection shows each fragment of bone to have a rolled and 

 rounded appearance. Several of the striated defences of the genus 

 Onchus, one of the Shark tribe, are clearly discernable, the annexed 



Fig. 



being a rough representation. 

 It would certainly be difficult 

 from this specimen alone to 

 determine the ownership of 

 the various bones seen, as this 

 can only be done after careful 

 inspection of the bone cells, 

 which are difficult to see in 

 the present instance. 



The rounded appearance of the bones leads one to conjecture, 

 that some time elapsed before they reached their final resting 

 place, and from the fine-grained tilestones which lie near this bone- 

 bed, the resting place was at the bottom of a deep sea. 



Mansfeldt H. Mills. 



The Ludlow Fish-Bed has now been traced some 40 or 50 

 miles from Ludlow into Gloucestershire. 



H. A. Roc ME. 



