82 ERIK A : SON STENSIO 
Visceral skeleton. 
Of the visceral skeleton only the quadrate is completely preserved. In addition 
there are fragments of the pterygoid, supraangulo-angular, dental, splenial, opercular, 
jugular plates, and a number of fragmentary gill-arches. 
The quadrate (P. 252, P. 238) has about the same shape as in W. sinuosa and the 
same is true, to a certain extent, of the postero-ventral part of the pterygoid as well 
(text fig. 32). — The other parts of the pterygoid are not preserved. — It seems, however, 
as if the posterior limb has been comparatively narrower than in W. sinuosa. The 
supraangulo-angular (P. 674) had a rounded corner dorsally and seems to have been 
rather high. Anteriorly it projects with a point a short distance in between the dental 
and the splenial; these two bones have only their posterior parts preserved. Both 
these and the supraangulo-angular are without sculpture. 
The opercular (P. 252) is very in¬ 
completely preserved. It is quite clear, 
however, that it was large and prob¬ 
ably of a rounded triangular shape. 
The jugular plates too are incomplete¬ 
ly known. As far as one can judge 
they were without sculpture, while 
on the other hand the opercular had 
a sculpture of the same kind as that 
of the cheek-plates. 
The conditions of the gill-arches 
are as in W. sinuosa. The ceratobranchials 
have a very deep furrow posteriorly and were partly cartilaginous interiorly (text 
fig. 33 A). The pharyngo or perhaps more correctly the epi-pharyngobranchials have 
about the same bifurcate shape as I have described in W. sinuosa. 
Dentition. 
The dentition on the pterygoid does not differ, as far as one can judge from the 
material at hand, very noticeably from that of W. sinuosa. The teeth in the presumed 
precoronoids are large, conically pointed (text fig. 33 B; PI. 8 , fig. 3 ), but, unlike those 
of W. sinuosa, probably straight. 
Sensory canals of the head. 
The sensory canals of the head were considerably stronger in this species than in 
W. sinuosa. The pores too are rather large and distinct. I found three of them on the 
supratemporo-extrascapular, one on the parieto-intertemporal (P. 252). 
Axial skeleton. 
With the exception of an unimportant part of the caudal region (P. 254) nothing 
is known with regard to the axial skeleton. This part shows, however, that the distal 
segments of the neural and haemal spines have been considerably thickened at their 
proximal ends. 
Text fig. 32. Wimania multistriata n. sp. 
The postero-ventral part of the pterygoid. From P. 238. »/ 2 .. 
