336 Mr. J. W. Hulke. On the Polacanthus Foxii. [Jan. 27, 



f' gWgg g . (173), {'do^Me^**™ 6 ? . (174), 



Jo l-&cos 8 V ; ' Jo S I-2<zcos80 + * 2 1 ; ' 



I ^ X ' - . . (175), with many others. 

 Jol— k& 



(Received February 4, 1881.) 



I have received permission to write down formula (132) thu& 

 amended : — 



f* ^ rm iss 



III. " Polacanthus Foxii, a large undescribed Dinosaur from the 

 Wealden Formation in the Isle of Wight." By J. 

 Hcjlke, F.R.S. Received January 3, 1881. 



(Abstract.) 



A description of the remains of a large Dinosaur, discovered in 

 1865 by the Rev. W. Fox, in a bed of shaly clay between Barnes 

 and Cowleaze Chines, in the Isle of Wight. Head, neck, shoulder- 

 girdle, and foreribs were missing, but the rest of the skeleton was 

 almost entire. Some of the presacral vertebrae recovered show a 

 double costal articulation. In the trunk and loins the centrum is 

 cylindroid, relatively long and slender, with plano-concave, or gently 

 biconcave ends. Several lumbar centra are ankylosed together, and 

 the hindmost to the sacrum. The sacrum comprises five relatively 

 stout and short ankylosed centra of a depressed cordiform cross- 

 sectional figure. The front sacral vertebras have a stout short 

 centrum. 



The limb bones are short, their shafts slender, and their articular 

 ends very expanded. The femur has a third trochanter, and the 

 distal end of the tibia has the characteristic dinosaurian figure. 



The back and flanks were stoutly mailed with simple, keeled, and 

 spined scutes, and the tail was also sheathed in armour. 



The animal indicated by these remains was of low stature, great 

 strength, and probably slow habits. It is manifestly a Dinosaur, and 

 is considered to be very nearly related to Hylceosaurus. 



