Stylonurus sp. 



Page 308 

 See plate 6 



I The terminal joints of the long posterior or fifth foot. 

 2-5 These are parts of segments or shields which will convey an 

 idea of the dimensions attained by some of these merostomes. 

 All have been more or less distorted by shearing but such 

 fragments are common in the shales and indicate the abund- 

 ant presence of these large animals in the fauna. They all 

 may be regarded as belonging to the genus Stylonurus. 



