^VO A/hfuiij Mvseum Records. 



Eijicesia Vfou ui, g. iiov. et sp. nov. 



Perhaps the most interesting of tlie undescribed forms in the 

 collection is a small reptile , apparently allied to Hyijorodapedon. 

 It is represented by a badly-crushed and imperfect skull, and by 

 a second specimen which consists of a few detached skull bones 

 and some other bones of the skeleton. A third specimen possibly 

 belonging to the same form consists of a fairlj' good pelvis and 

 some imperfect limb bones. 



The animal was probably- about the size of Rhj/ncfiusaiirns, 

 but owing to the fi-agmentary nature of the remains, it wnll be 

 some time before it will be possible to give a detailed account of 

 the form. 



The posterior half of both mandibles is fairly complete. The 

 dentary, so far as preserved, has at least four rows of denticles 

 arranged along its upper and inner side. Each little tooth is a 

 blunt enamelled point which rises about h mm. aliove the 

 bone. 



The surangular is of large size and forms the greater part of 

 the posterior half of the jaw as viewed from the outer side. It 

 overlies a large hollow space in the jaw. The angular, and what 

 I regard as the splenial, form the lower part of the jaw. There is 

 no distinct coronoid visible, but it may be present. A good part of 

 the articular is present. The length of the jaw from the posterior 

 part to the beginning of the denticles is about iS5 mm., and the 

 greatest depth of the jaw is i)robably about 14 mm. (11 mm. as 

 dis})layed). 



The cast is })reserved of the greater part of the jugal, and of 

 part of the quadrato-jugal, ])ost-oi'l)ital and maxiUary. The jugal 

 forms the whole of the lower border of the orbit and divides 

 behind as in Sphenodon, into an upper part which meets the post- 

 orbital, and a lower which meets the quadrato-jugal. The orbit 

 has probably l)een about 1(S mm. in diameter. The gi-eatest length 

 of the jugal is about 23 mm., and the depth below the orbit 4 mm. 

 In the lower part of the orbit are 3 or 4 little bony fragments 

 which may be sclerotic plates. 



