TRIASSIC FISHES FROM SPITZBERGEN 
is much the same as in S. tuberculata ; the anterior limb is . very high posteriorly, 
and this high part is, as far as one can see, broad. The lower jaw was rela¬ 
tively low. Of its elements the supraangulo-angular appears to be fairly well 
preserved and it seems as if it was elongated with a rounded but not espe¬ 
cially decided dorsal corner. The dentition is of about the same type as in the 
species described above. With regard to it, however, it is worthy of special 
mention that there are distinct, rather strong, conically pointed teeth on the pre- 
coronoids. The pores of the sensory canals are, at least in the lower jaw, rather 
small and rounded. Nothing certain can be said as to their number. 
Remarks. — This species was founded and described by Woodward 1912 (loc. cit.) 
under the name of Coelacanthus guttatus and it cannot be denied that in many respects 
it agrees with Coelacanthus. On the other hand I have been able to observe distinct 
agreement between it and Sassenia tuberculata and because of this I have, though with 
hesitation, considered it proper to refer it to the genus Sassenia. 
Geological occurrence and locality. — S. guttata is found in the fish horizon. 
The single specimen known comes from the cliff on the shore of the south side of Sassen 
Bay between Flower Valley and De Geer Valley. 
Genus Axelia n. g. 
The most distinctive characters of this genus may be summarized as follows. 
Fishes of average size or rather large. The head as a whole robustly built and 
'fairly broad, with a sculpture of tubercles and striae. The fronto-dermosphenotics 
rather short. The supraorbitals four in number, quadrangular. Cheek plates much 
reduced, represented only by a number of very small scale-like plates. The para- 
sphenoid broad and thick. The pterygoid with a broad posterior and a long 
anterior limb, for the most part low; the dorsal margin of the posterior limb with 
a deep angular sinus. The supraangulo-angular high and triangular. The ossification 
in the ceratohyal short but strong. The opercular large. Nothing known about 
the dentition on the labial margin of the jaws; otherwise the dentition strong and 
adapted for crushing with closely arranged teeth. The sensory canals strongly 
developed and opening to the exterior by large pores. The paired fins rather small. 
The most anterior dorsal fin very high but short-based. The caudal fin also 
high, though its dorsal and ventral lobes are at the same time long. The lepido- 
trichia of all the fins narrow and unjointed for a long distance proximally; those 
of the first dorsal and caudal fin furnished with two rows of small tubercles on 
the lateral sides. The sculpture of the scales consisting of rather coarse striae, the 
median ones of which are often the most developed. 
Axelia, like the two genera Mylacanthus and Scleracanthus described below, is especially 
distinguished from other Coelacanthids so far known in detail by its dentition. Otherwise 
it differs from the ordinary Coelacanthid type only in some rather unimportant morpho- 
S ten si 6, Triassic Fishes from Spitzbergen. 12 
