g6 
ERIK A : SON STENSIO 
Certain differences in form and extent in the various bones are, however, plainly established. 
In some ways A. robusta offers an especial interest in respect to the dermal cranial 
roof, as the bones are considerably more fully preserved than in any Coelacanthid 
before known, with the exception possibly of Macropoma. 
The parieto-intertemporals (Pa. it, text figs. 3 g, 40, 43,44; Pis. 11 —13; PI. 14, fig. 1) 
ie nearly horizontally and, in relation to the total length of the cranial roof, are rather 
large. They are four-sided and nearly rectangular in shape and their breadth is about 
half their length. They cover a posterior part of the orbitotemporal region, and about 
the anterior half of the labyrinth region. Medially they,meet in a somewhat undulating 
mandibula). J / 4 . 
De, dental; Ext, extrascapulars; Fr. dsph, fronto-dermosphenotic; G, jugular plate; Na. ant, uasalo-antorbital; Op, opercular; Pa.it, 
parieto-intertemporal; Ply, postrostral; R, rostrals; Sang.ang, supraangulo-angular; Scr, sclerotic ring; So, Supraorbitals; Spl, 
splenial; Sscap, suprascapular; Stemp. ext, supratemporo-extrascapular; na u anterior nasal aperture; na v posterior nasal aperture; 
p, pores of the sensory canals. 
longitudinal suture; their posterior margin is concave, their anterior and lateral ones are 
pretty nearly straight. The sinus in the lateral one for the supratemporo-extrascapular 
is short. The perpendicular lamella on the ventral side is well developed. The centre 
of ossification is plainly seen and lies close to the antero-lateral corner, just dorsally of 
the perpendicular lamella. 
The supratemporo-extrascapulars [Stemp. ext, text figs. 3 g, 40, 43, 44; Pis. 11—1 3 ; 
PI. 14, fig. 1) are united in the usual way to the parieto-intertemporals and correspond 
closely in shape and extension with the same bones in W. sinuosa. 
