DICOTYLIN.E OF AMKIUCA. 



:!li 



Length of lover j a w, 



Height l'rom coronoid to angle, 

 " " condyle " " 



" of body at first true molar, - 



Length of symphysis, ... 



Distance between coronoids, 

 " " angles, 



Length of lower molar series, - 



hiatus, anterior to molars, - 



.Admeasurements of the teeth in Euchccrus macrops. 



A lit. post. diam. sup. post, molar, ......... 9" 



Transverse diam. " " " ......... • >' " 



Height of crown " " " 6 " 



Ant. post. diam. sup. first true molar, ........ 6J " 



Tranverse " " " " 5 " 



Ant. post. diam. sup. third premolar, ........ 4J" 



Transverse " " 5j " 



Height of crown " " ......... 5" 



Ant. post. diam. sup. first premolar, --------- / i" 



Transverse >•«««« /x .. 



Height of crown " " " 3| " 



Ant. post. diam. inf. post, molar, ---...... 10" 



Transverse " " " 5| " 



Height of crown " " 6| " 



Ant. post. diam. inf. first true molar, i; •• 



Transverse " " " 4j " 



Ant. post. diam. inf. third premolar, 5" 



Transverse " " " 4| " 



11 ight of crown " ".--...... " 



Ant. pist. diam, inf. first premolar, -.-...... 4" 



Transverse " " " 3j " 



1 1 ight of crown " " ......... :t •■ 



Length of upper canine along convexity, 3" 



" " enamelled portion externally, - - - . - . . . 1 " 3 " 



" " lower canine along convex margin, - - - - - - - 3 " 10 " 



" " enamelled portion externally, - - - - - - - - 2 " 7 " 



The existing and extinct species of Dicotylintc, so far as investigations have extended, 

 appear to be as follows: — 



Existing. 



DlOOTI ti.- l"Kur \ ri ~, f 'urirr. 

 DlOOTTLBS LABIATOS, Cuvicr. 



1'atinxt. 

 Dicottles, "i sp.? /,'///</.- Danske natarw. Afli., l S 1 1—2. 



