52 ANOMOBONTIA. 



radius of a very large Dicynodonfc ; from the Karoo 

 system of Tepid-spring, near Tort Beaufort. The pectoral 

 girdle includes the adjacent portions of the scapula, 

 coracoid, and precoracoid, and is precisely similar in struc- 

 ture to the undermentioned small specimen No. 36287, 

 thus proving the association of that type of pectoral girdle 

 with undoubted Dicynodont remains, and also that the 

 precoracoid and coracoid persisted as separate hones till 

 maturity. Presented by A. G. Bain, Esq., 1853. 



36287. The imperfect right half of the pectoral girdle of a com- 

 {Fig.) paratively small form, probably referable to a species of 

 - Ptychosiagum ; from the Karoo system of the E-henos- 

 terberg branch of the Sneewberg range. Of the scapula 

 only the glenoidal extremity remains ; the precoracoid has 

 lost its antero-internal angle, but the coracoid is nearly 

 entire. Figured by Owen in his ' Catalogue,' pi. lxix. 

 figs. 5, 6, and also by Seeley in the ' Phil. Trans/ for 

 1888, p. 492, fig. 1. It is also represented in woodcut 

 fig. 2 (p. 16) of the present volume, with a restoration 

 of the scapula. From the close resemblance of the scapula 

 to that of Ptychosiagum orientals, it is probable that this 

 specimen is referable to that genus, and it would agree 

 approximately in relative size with the skull of P. elective \ 

 In the restoration of the precoracoid given by Seeley 

 there is no justification for the obliteration of the notch at 

 the junction of the precoracoid with the acromion, which 

 seems to be a natural one. Owen identified the process 

 marked a in woodcut fig. 2 with the acromion, correlating 

 it with the similar process in the scapula of Dicynodon 

 No. 47056* (p. 21); but Seeley regarded the reflected 

 projection of the preaxial border (b of fig. 9) as the 

 acromion. That the former identification is the true one 

 is shown by No. 47056*, where the process corresponding 

 to b is situated near the distal extremity of the bone. 



Presented by Sir George Grey, K.C.B., 1858. 



36272 x. A split nodule of rock showing the imperfect right half of 

 a similar pectoral girdle ; from the Rhenosterberg. Both 

 sides of the glenoidal portion of the scapula are shown, 



1 From the proportions obtaining in the specimen described as Cirognathus 

 (p. 49), it was suggested by Seeley (op. cit. p. 491) that this pectoral girdle 

 indicated a skull of some 12 inches in length, the larger relative size of the 

 skull in young animals being overlooked. 



