No. 2.] GRAMMICOLEPIS BRACHIUSCULUS. 279 
to some extent the squamosai (Sg). With the epiotic (£.0.) 
it is connected simply by a feeble and thin band of bone. The 
parietals, then, seem to play the part here of binders, rather 
than their presence is at all essential to covering over any siza- 
ble vacuity in the cranial vault, that might exist were either of 
them removed. 
The supraoccipital is a very extensive ossification, and is char- 
acterized by a fairly prominent crest. 
4 
BO. 
Figure 3.— Cranium of Grammicolepis brachiusculus, seen from above; life size, 
by the author. Lettering as before. 
This crest is triangular in outline, with its apex above, and its 
base attached in the middle line, to the horizontal portion of 
the bone. From the middle point of this base, a narrow, fan- 
shaped development springs upon either side, which is incor- 
porated with the crest, to strengthen it, being carried nearly as 
high as its apex (Fig. 2). 
. The broad and spreading horizontal portion of the bone forms 
the roof of the brain-case, while posteriorly, just before the ter- 
mination of the crest, it is bent abruptly down to meet the 
exoccipitals. The flexure, being sharply defined by a transverse 
line, the outer end of which, either way, terminates in the apex 
