MR. X. ATTHEY OX ANTKRACOSAUEUS BTJSSELLI. 311 



the premaxillaries in front, and form the outer posterior margins 

 of the nasal orifices. Their inner margins articulate anteriorly 

 for a short distance with the nasals, then for three inches with 

 the lacrymals, afterwards for six inches and three-quarters with 

 the jugals, and, lastly, by three-quarters of an inch posteriorly 

 with the quadrate-jugals. 



The nasals lie immediately behind the premaxillaries and be- 

 fore the frontals ; they are much broader in front than behind, 

 and occupy the whole space between the nasal orifices, of which 

 they close the inner and posterior margins ; they are bounded on 

 their outer sides by the maxillaries for an inch, and next by the 

 lacrymals for four inches. 



The lacrimals are of an elongated pear-shape, the point in 

 front, occupying the angles left by the maxillaries and nasals. 

 They are bounded by the nasals internally, by the prefrontals 

 posteriorly, and by the maxillaries and jugals externally. They 

 do not enter into the formation of the orbital vacuities, as in 

 Loxomma ; the prefrontals intervene, separating them by a con- 

 siderable space from those vacuities, and forming nearly the 

 whole of the anterior borders of the latter. 



The frontals, a little longer and narrower than the nasals, are 

 broader before than behind, united in front to the nasals, behind 

 to the parietals, and, by the straight median suture, to each 

 other. Their outer margins are articulated to the prefrontals 

 for three-fourths of their length, and to the postfrontals for the 

 remaining posterior fourth. 



The prefrontals are much broader than the frontals, by which 

 they are bounded along the whole of their inner borders; the 

 lacrymals bound them in front, and the jugals on their outer 

 borders ; they rest upon the postfrontals behind by spaces not 

 greater than two-tenths of an inch. The remaining parts of 

 their posterior borders form three-fourths of the anterior margins 

 of the orbital vacuities, including the greater part of the two 

 marginal concavities already noticed. 



The postfrontals, rather shorter and much narrower than the 

 last, which they join in front by a long process, articulate by 

 their inner edges for equal distances with tin 1 frontals and 



