REPTILES. 125 



movable, and either simple or double appendage, or more rarely a pair of symmetrical prolongations. 

 The latter, indeed, occurs in some Scaly Reptiles in which the appendage alluded to consists of two 



horns terminating in the muscles with free extremities, whilst a pair of ribs have united themselves 

 with these horns at a distance from their extremities. But, ' -enerally speaking, the number of the 



ribs which are intimately connected with the Sternum, and to which the name of 'true ribs' can be 

 applied, not only varies with the genus, but is also very various in different species, as may be seen 



from the following table, in which, moreover, those species possessing sternal horns with free ends are 

 indicated by an asterisk. 



With the anterior With the posterior 



Of the ribs there are connected in division of the posterior division of 



sternal piece. ditto. 



Chamaleo pumilus . . 2 pairs. pairs. 



vulgaris . . 2 1 



Varanus niloticus . 2 1 



ornatus . . 2 1 



bivittatus . . 2 1 



*Agama mutabilis . . 2 1 



*Lyriocephalus margaritaceus 2 1 



Seps Chalcidica ... 2 1 



Anolis Carolinensis . . 2 3 



Po/ychrus marmoratus . . 2 3 



*Draco viridis ... 3 



*Phrynosoma Harlanii . . 3 



*Phrynocephalus caudivolvulus . 3 



*Agama colonorum . 3 1 



*Lophyrus giganteus . . 3 1 



*Istiurus amboinensis , . 3 1 



*Basiliscus mitratus . . 3 1 



*Moloch horridus . 3 1 



*Stellio vulgaris ... 3 1 ,, 



*Zonurus cordylus . . 3 1 



Tejus Teguixin ... 3 2 



Ameiva vulgaris ... 3 2 



Lacerta agllis ... 3 2 



Lacerta ocellata ... 3 2 



Platydactylus guttatus . . 3 2 ,, 



,, aegyptiacus . 3 2 



Charruesaura anguina . . 3 2 



Euprepis Merremii . 3 2 



bistriatus . 3 2 



Cydodus nigroluteus . 3 2 



Gongylus ocellatus . 3 3 



Calotes pictus . . . 3 3 



*Uromastio: spinipes . - 4 



*Grammatophora barbata . 4 



Iguana tuberculata . 4 2 



Agama umbra ... 4 2 



Opiums torquatus . 4 2 



