664 ME. W. H. HAEDAKER Ols^ A EOSSIL-BEAEI^TG HORIZON [DeC. I912, 



is the longest, and the first the shortest. The first is the one 

 which is most frequently absent in the cast. The toes are turned 

 somewhat towards the inside of the track. The fore footprint is 

 smaller than that of the hind foot. The breadth of all the foot- 

 prints exceeds their length. 



Measurements. 



H2. 



I. PACHTDACTTXFM 



Pabst. Rothliegende. 



1 



Minimum. 



Maximum 



Average. 



Average. 



Fore foot : 



Length 



Breadth 



cms. 

 3-5. 

 4-5 



o'-o 

 1-0 

 1-1 

 0-6 



cms. 

 4-5 

 6-0 



1-2 

 1-8 

 1-8 

 1-2 



cms. 



! 4-2 



5-2 



I'-O 

 l-o 

 1-3 

 1-0 



cms. 

 4-2 

 5-3 

 1-0 

 lo 

 1-6 

 1-8 

 1-2 



1st toe 



2nd toe 



3rd toe 



4th toe 



5th toe 



Hind foot: 



Length 



Breadth 



40 



5-0 

 0-5 

 1-0 

 1-0 

 1-5 

 1-0 



7-0 

 7'o 



1-0 

 1-5 

 1-6 

 2-0 

 1-3 



5-0 



! 5-8 

 0-8 

 1-2 

 1-4 

 1-8 



f 1-2 



00 

 5-7 



1-2 

 l-o 

 1-8 

 2-4 



1-5 



1st toe 



2nd toe 



3rd toe 



4th toe 



6th toe 





Track-measurement I ... 

 Track-measurement II ... 

 Width of track 



3-5 

 10 

 10 



12? 

 26? 

 12 



' 9-6? 

 i 18-6? 



5-7 

 15 



10-4 



1 





Sub -Type Hpa. Ichnium pachtdactylum (minus) Pabst. One 

 specimen in relief. (See also pp. QQb-QQ.) 



The specimen shows small footprints of the same characters as H2, 

 but smaller. They are 0'8 cm. long, and of about the same width. 



Sub -Type Hoft' Ichnium pachtdactylum (ungulatum) Pabst= 

 Saurichnites Jeisnerianus (Geinitz). Pour specimens, three 

 in relief (casts) : one as a mould. (See figs. 17 & 18, p. 666.) 



The footprints of H95 in some cases possess a broad ball with 

 short, thick, and blunt-ended toes. These are five in number, but 

 usually four only are shown in the print. In this case the ball of 

 the foot then resembles the whole footprint of H2. In others the 

 ball of the foot is not indicated. In all cases, however, a semi- 

 circle of claw-markings with five or fewer claws is present. This 

 semicircle, when the ball of the foot is represented in the impres- 

 sion, precedes it in the track by about 2 cms. The footprints are 

 wider than they are long. The length of three of the footprints 

 is from 4 to 5 cms., and the width from 5 to 6 cms. The toes 

 vary from I to 2 cms. in length. Track-measurement 1=12 cms., 

 and track-measurement 11 = 14 cms. The fourth example of this 

 type is considerably smaller than the others. It shows no ball in 



