1904.] ON THE ANATOMY OF THE LACERTILIA. 465 



there is no doubt as to which name should stand, for since no 

 diagnosis was given by HeiT Neumann in the Abstract (as 

 published in ' Nature ' and elsewhei-e), the delay in the issue of 

 the November part of the 'Proceedings' until April 1, 1899, 

 allowed abundant time for the German ' Sitzimgsberichte ' to be 

 published. 



With regard to the generic name now used, it may be pointed 

 out that Hippotragus (Sundevall, 1846 *) is antedated by Ozanna 

 (Reichenbach, 1 845), and that the latter name should be used by 

 those who contend that Egoceriis (Desmarest, 1822) is invalidated 

 by ^Egoceros (Pallas, 1811). 



But since the last-mentioned term is not in use, being a synonym 

 of Ovis, and the alternative to Egocerus is the very objectionable 

 name Ozanna, we are of opinion that this is one of the cases 

 where a name need not be considered preoccupied unless its 

 spelling is identical with that of its earlier rival. 



2. Contributions to the Anatomy of the Lacertilia. — (2) On 

 some Points in the Structure of Tupinamhis. By Frank 

 E. Beddard, F.R.S., Prosector to the Society. 



[Received March 14, 1904.] 

 (Text-figures 96-98.) 



The principal recent memoii-s known to me which deal with the 

 visceral anatomy of Tu,pinamhis ai-e those of Butler f, Hoch- 

 stetterj, and Milani §. The two former deal almost entirely 

 with the diaphragm, whilst the last-mentioned author describes 

 the lungs and refers to pi'eviovis observations (those of Meckel) 

 upon the same organs. I myself deal in the following pages with 

 a few anatomical facts which, so far as I am awai'e, are new. 



Aortic trunk. — The heart of Ttqnnambis resembles that of 

 Iguana more than that of TiUqua in its closeness to the liver. 

 Moreover, the right and left aortfe trace a longer course before 

 they join to form the common aorta. There are, in fact, in Tupi- 

 namhis and Iguana three paii'S of intei'costals ai'ising from the 

 light aortic arch between the origin of the subclavian and the 

 fusion of the aortse, while there are only two pairs in Tiliqua. 

 In the last-named genus the subclavians are concealed beneath the 

 musculature for a considerable distance after theii- oiigin from 

 the aorta ; in Tupinamhis, as in Iguana, these vessels ai'e super- 

 ficial and visible from theii- origin until where they plunge into 



* References to all these names will be found in Palmer's invaluable ' Index 

 Generum Mammalium,' 1904. 



f " On the Subdivision of the Bodj'-cavity in Lizards, Crocodilei^, and Birds," 

 P. Z. S. 1889, p. 452. 



J " Ueber partielle und totale Scheidewandbildung, &c.," Morph. Jahrb. xxvii. 1899, 

 p. 263. 



§ " Beitrage zur Kenntniss der Reptilienlungen," Zool. Jahrb., Anat. Heft vii. 

 p. 645. 



