3oo 
ERIK A : SON STENSIO 
the intercoronoideo-prearticular (Icor. pra) removed to show the 
supraangulo-angular (Sang, ang ) and the corpus of the quadrate 
(Qu). In figure i there are seen behind the sclerotic ring ( Scr ) 
a number of loose very small bone-plates which cover the cheek, 
and besides there are two tubes of bone, one of which surrounds 
a part of the infraorbital canal (ifc) and the other a part of the 
jugal canal (jc). A well developed mandibular senso ry canal (me) 
is clearly shown in figure 2. 
Explanation of index letters. 
Chy, ceratohyal; De, dental; Icor. pra, intercoronoideo-prearticular; Mptg, metapterygoid; 
Na. ant, nasalo-antorbital (fragment); Op, operculum; Pt, pterygoid; Qu, quadrate; Sang. ang. supra- 
angulo-angular; Scr, sclerotic ring; Spl, splenial; jc, tube of bone surrounding a part of the jugal 
sensory canal; jfc, tube of bone surrounding a part of the infraorbital sensory canal; me, mandi¬ 
bular sensory canal; p, pores of the mandibular sensory canal; t, tubuli of the mandibular sensory 
canal. 
Plate 16. 
Fig. 1. Axelia robusta 
elegans 
n. sp., parasphenoid (Psph) and preethmoid ( Pethm ) in ventral aspect. The 
same specimen as the one figured in plates 11—14 (P. igS). On the 
ventral surface of the parasphenoid a number of rather large spheroid 
teeth preserved. 
» » tooth from the parasphenoid reproduced in fig. 1 (P. ig 5 ). 5 / 2 . 
» » Part of the caudal fin and a part of the squamation (P. 222) preserved 
as impression. 
» » part of the parietointertemporal of the same specimen as in plates 
11—14 (P. ig 5 ) magnified to show the character of the ornament. ®/ 2 . 
» » part of the squamation (P. 230). 
» » operculum preserved as impression of the lateral surface (P. 223). 
» » part of the squamation (P. 221). 2 / 1 . 
Explanation of index letters. 
Pethm, preethmoid; Psph, parasphenoid; f. pal, foramen probably for a dorsal branch of the 
r. palatinus anterior; lat. for, foramen for vessels and nerve branches (branches of r. maxillaris 
trigemini and n. buccalis lateralis) to the foremost parts of the snout; ms, furrow along the ventral 
border of the lateral surface of the preethmoid for vessels and for r. maxillaris trigemini and n. 
buccalis lateralis. 
Plate 17. 
Fig. 1. Axelia elegans n. sp., parts of the head skeletons together with the anterior dorsal fin (Di) 
and one of the pectoral fins (P. 223). 
» 2. » » » » magnified detail of the same specimen (P. 223) as in figure 1 showing 
some of the membrane bones of the cranial roof and some scales. 
Especially noteworthy are the conditions of the cranial section ( Ic) 
of the lateral line, as the supratemporal cross-commissure (s. com) is 
given off from it within the supratemporo-extrascapular (Stemp. ext). ®/ 2 . 
» 3. Scleracanthus asper n. sp., anterior dorsal fin (Di) with its supporting endoskeletal bone (Spi), 
the endoskeletal supporting bone of the posterior dorsal fin (Sp2), 
and ( parts of the axial skeleton (P. 23g). 
