A mp hi bia. — A rchcegosaurus, etc . 
69 
ig 91..— -A rchcegosaiirus Decheni (Goldfuss). — Frontal aspect of the cranium, with the 
sculpture omitted; from the Rothliegendes (Lower Permian) of Saarbriick. About 
f mx ' premaxilla; Mx, maxilla; A a, nasal; La, lachrymal; Fr, frontal; PF, pre- 
frontal ; i a, parietal; Ptf, postfrontal; PtO, post-orbital; Ju, jugal: QJ, quadrato- 
^squamosal; ST, supratemporal ; Ep, epiotic ; SO, supraoccipital. ( After 
Fig. 92. — A, Left lateral aspect ; B, posterior aspect of a vertebra of Euchiromurus Rocliei 
(Gaudry). from the Lower Permian of France, n , Neural spine with lateral expan- 
sions, al; s, suture between spine and arch ; za, prezygapophysis ; zp, postzygapo- 
physis ; d, transverse process ; c, rib facet ; cr, neural canal ; ic, intercentrum ; pic, 
pleurocentra (illustrating the rhachitomous type of vertebra). ( After Prof. Gaudry.) 
