Fauna and Stratigraphy of the Stormberg Series. 403 



MASSOSPONDYLUS SCHWARZI, sp. nov. 



The bones upon which this species is founded were unearthed 

 by Professor Schwarz at Makomoreng, Mount Fletcher, C. P. They 

 are in the collection of the South African Museum (Cat. No. 5134). 



The species differs from M. harriesi and Aetonyx palmtris in the 

 comparative size of the metatarsals. Taking the first metatarsal as 

 a standard, the second and third are longer in this form than in 

 the other species, in this respect the foot approximating most to 

 M. harriesi. In addition, the phalanges of the digits are relatively 

 longer than in the other forms, those of the third digit being actually 

 as large as in M. harriesi which has a third metatarsal 20 mm. longer 

 than in this new form. 



These differences seem sufficient to justify the provisional erection 

 of a new species for these remains; they certainly cannot be placed 

 in any described species until we know more concerning the limits 

 of individual variation among these Dinosaurs. The distal end of the 

 tibia is somewhat more swollen than in M. carinatus, but as the foot 

 bonse seem to approximate more closely to MassospondyUts than to 

 Aetonyx, I shall provisionally name the form Massospondylus schwarzi. 



The following table gives the chief measurements of the bones of 

 the foot: 



Greatest length. Proximal width. Distal width. 

 Metatarsal I 71 mm. 33 mm. 30 mm. 



1st phalanx 41 27 23 



claw imperfect 19 ,, 



Metatarsal II 118 mm. prob 25 ,, 33 



1st phalanx 47 31 27 ,, 



2nd phalanx 31 21 13 



claw imperfect 15 ,, 



Metatarsal III 135 mm. 22 31 



1st phalanx 47 31 22 



2nd phalanx 34 23 20 



3rd phalanx 30 21 19 



claw imperfect 19 ,, 



Associated with the foot are some portions of the leg and sacrum 

 which are too imperfect for accurate determination. 



Type. Incomplete pes and distal end of tibia. S.A. Mus. Cat. 

 No. 5134. 



Locality. Makomoreng, Mount Fletcher, C.P. 



Horizon. Red Beds. 



2(3 



