THE SYSTEMATIC VALUE OF RANA CHTNENSIS OSBECK 



77 



16. Foramen magnum 

 oval. 



17. The processus zygo- 

 maticus of tympanicum ex- 

 pand forwards, just reach 

 to half the length of orbit. 



1 8. Back corner of inner 

 branch of tympanicum forms 

 very blunt angle. 



19. Back branch of tym- 

 panicum very short so that 

 the condylus always extends 

 beyond line joining the 

 articulation of jaws. ^ 



20. If we join by a line 

 the posterior corners of 

 inner branch of tympani- 

 cum, this line invariably 

 crosses foramen magnum in 

 the middle. 



21. Diapophysis of sec- 

 ond vertebra flat, outer 

 side of front border presents 

 a prominent long crest. 



22. Outer side of diapo- 

 physis of third vertebra is 

 carved out shovel-like and 

 on median side of back 

 border a strong, project- 

 ing bone ridge extends to 

 the base of the diapophysis. 



23. Diapophysis of eighth 

 vertebra generally curved 

 backwards median side ex- 

 panding wing-like, back- 

 wards. 



24. Processi spinosi of 

 vertebrae longer. 



25. If we draw on pelvis 

 on the upper border of 

 ilium crest a line parallel 

 to base of pelvis, this line 

 will just be attained by 

 upper corner of crista ischio 

 pubica. 



16. Foramen magnum 

 oval. 



17. The processus zygo- 

 maticus of tympanicum 

 curved inwards invariably 

 extends beyond half the 

 length of orbit. 



18. Back corner of inner 

 branch of tympanicum fre- 

 quently forms a sharp 

 angle, rather projecting 

 backwards. 



19. Back branch of tym- 

 panicum long, so that the 

 line joining the articulation 

 of jaws remains far behind 

 the condylus. 



20. If we join by a line 

 the posterior corners of 

 inner branch of tympani- 

 cum this line generally 

 crosses foramen magnum in 

 its upper third. 



21. Diapophysis of sec- 

 ond vertebra cylindrical, 



I outer side of front border 

 presents a slight bony crest. 



22. Outer side of dia- 

 pophysis of third vertebra 

 shovel-like carved out. 



23. Diapophysis of eighth 

 vertebra expanding back- 

 wards in the form of a wing. 



24. Processi spinosi of 

 vertebrae shorter. 



25. If we draw on pelvis 

 | on the upper border of 

 I ilium crest, a line parallel 

 to base of pelvis, the upper 

 ! corner of crista ischio pubica 



will remain much below this 

 line. 



16. Foramen magnum of 

 a somewhat circular form. 



17. Processus zygomati- 

 cus of tympanicum curved 

 inwards, does not even 

 reach the half of length of 

 orbit. 



18. Back corner of inner 

 branch of tympanicum forms 

 a blunt angle. 



19. Back branch of tym- 

 panicum shorter, conse- 

 quently the line joining the 

 articulation of jaws just 



j meets the back border of 

 I condylus. 



20. If we join by a line 

 the posterior corners of 

 inner branch of tympani- 

 cum this line just touches 

 the upper border of fora- 

 men magnum. 



21. Diapophysis of sec- 

 ond vertebra cylindrical, 

 towards middle of outer side 

 we notice a slight protuber- 

 ance. 



22. Outer side of diapo- 

 physis simply flattened. 



23. Diapophysis of eighth 

 vertebra of a cylindrical 

 form- 



24. Processi spinosi of 

 vertebrae shorter. 



25. If we draw on pelvis 

 on the upper ridge of ilium 

 crest, a line parallel to base 

 of pelvis, the upper corner 

 of crista ischio pubica will 

 remain much below this 



I line. 



