A DESCRIPTION OF SOME TASMANIAN SKULLS — SMITH. 21 



long epipteric bone, imperfectly cut off from the parietal ; on 

 the right side the four bones at the pterion meet at a point. 

 On the right side a wedged-shaped wormian bone is inserted 

 between the mastoid and the squamous portion of the temporal. 

 On both sides the root of the zygomatic arch extends back- 

 wards and upwards on the temporal bone, forming a distinct 

 ridge as far as the posterior limit of the bone. The wing of 

 the sphenoid is small and narrow, measuring only about 9 mm. 

 in width at the narrowest portion. It is very deeply excavated. 

 The spheno-malar suture on both sides is on a raised, roughened 

 sharp ridge. On the left side the spheno-temporal suture 

 is on a small ridge. On the right side the sphenoid and 

 temporal bones have sprung away from each other, but there 

 seems to be a slight ridge at the lower part of the suture. 

 On the left side the infra-temporal crest is scarcely perceptible ; 

 on the right side it is represented by a thin, sharp ridge 

 running only partly across the bone, and in a direction more 

 diagonal than usual. On each side the tuberculnm spinosum 

 is a small, thin, flat projection. 



Norma facialis. — (PI x., fig. 2). The condition of the floor 

 of the nose is similar to that in the former skull. A thin, sharp 

 ridge, the crista prsenasilis of Klaatsch, double or grooved 

 on the right side, runs from the outer margin to the 

 nasal spine, joining the parasternal line before reaching the 

 spine. As in the former skull, this condition is better marked 

 on the right side. The spine is distinct, though not large. 

 The anterior nares are pear-shaped ; the nasal index is 58.1. 

 The gnathic index by Flower's method is 98.9. The infra- 

 orbital fossae are abnormally deep. The canine and incisive 

 fossse are scarcely at all marked. The fronto-malar border 

 of the orbit is somewhat thickened. In both orbits the suture 

 forming the continuation forwards of the infra-orbital canal 

 turns inwards behind the margin of the orbit, as in the other 

 skull. As in the other skull also, on the outer wall of the 

 orbit, the suture between the sphenoid and the malar runs 

 downwards, courses for a little way along the anterior border 

 of the spheiio-maxillary fissure, and passes forwards and 

 inwards on the floor of the orbit to become continuous with 

 the maxillo-malar suture. In the right orbit of this second 

 skull there is a sutura verticalis which runs from the anterior 

 extremity of the suture from the infra-orbital canal across the 

 orbital margin to an accessory infra-orbital toranieu above 



