APRACTOCLEIDUS TERETIPES. 



627 



Kensington ; and my best thanks are due to Professor Gregory for the interest he 

 has taken in the work, and for the indispensable guidance I have received from him. 



I have also to express my gratitude to. the Carnegie Trust, the Eesearch Com- 

 mittee of which generously provided a grant for the illustrations in this paper. 



The dimensions (in centimetres) of the type specimen (V. 1091) are given below, 

 and in some cases measurements of corresponding parts of Cryptocleidus oxoniensis 

 are given for comparison : — 



Vertebrse. 





03 





S 









+s 





13 



'3 









< 



— "5 



> 



5 "3 



^> i — - 



03 CS 





£ ^ 



o 



4^ 



H 



5 



-^ , j 



O 





r3 



~t, .2 



05 



S3 i) 



"■« .2 



it,.a 



8 .3 



03 



P 

 -B 



P 



03 ?3 



<3 





e8 



s > 



3 '- 



'_ 0) 



o 



-e > 



~ 03 



03 ;-, 



03 03 



"£ 03 



Ph 



-*2 





^P 



CO 







^U 



3 



£° 



^ 



•SO 

 H 



so 



to 





03 



H 



fe 



S 





< 



4-4 



2-8 



£h 









H 







46 



4-7 



4-6 



Length of centrum in 



3-2 



3-6 



3-7 



4-0 



3-9 



38 



4-3 



mid-ventral line 



























Width of posterior 



2-9 



36 



4-2 



4-7 



5-2 



5-8 



6-0 



6-1 



6-2 



6-4 



6-3 



6-1 



end of centrum 











approx. 









approx. 









Height of posterior 



2-4 



2-9 



33 



3-7 



4-5 



4-6 





4-S 



51 



5-3 





4-8 



end of centrum 











approx. 







approx. 



approx. 



approx. 







Height to top of 



5-5 



7-4 



8"6 



10-4 





1 135 



14-0 





... 







... 



neural spine 







approx. 







I 















Shoulder-Girdle compared with Cryptocleidus. 







V. 1091. 



R. 2616.* 



Greatest length of combined scapula and coracoid .... 



60-0 



66-5 



Coracoid — Length from middle of glenoid cavity to tip of postero-lateral 







process .......... 



31-5 





Width of united bones at hinder angle of glenoid cavity . 



40-6 



42-2 



,, ,, ,, narrowest point .... 



31-7 



33-0 



„ between outer ends of postero-external angles 



62'5 



571 



(Neatest length (median) ... 



39 - 5 approx. 



46-7 



Scapula — Greatest length (middle of glenoid to anterior extremity) 



33-2 



32-2 



Length of median border .... 



20 '5 approx. 



18-8 



Length in a straight line from median border to top of dorsal 







ramus ...... 



26-0 



245 



Length of glenoid surface 



5-5 



6-2 



„ surface for coracoid 



80 



8-5 



Antero-posterior diameter of coraco-scapular opening 



13-1 



12-1 



Lateral „ „ „ . 



9-6 



110 



Clavicle — Length of median border 



125 



12-1 



Width (median border to outer angle) 



12 7 





Length of nnterior border ..... 



175 



18-0 



Andeews. 1910, p. 195. 



