TRIASSIC FISHES FROM SPITZBERGEN 
3 O'/ 
Plate 34 - 
Fig. 1. Perleidus woodwardi nom. nov., head of the specimen (P. 177) in figure 2; magnification 
1 1 j 2 . The preserved parts of the sensory canals of the 
head stained white. 
» 2. » » » » specimen lacking the caudal region (P. 177). Most parts 
preserved only as impressions in the stone (impression of the external surface). 
Explanation of index letters. 
Ant, antorbital; Cl, cleithral; D, dorsal fin; Ext, extrascapular; Fr, frontal; Id, clavicle: 
Ifo , infraorbital series of bone plates; Mx, maxillary; Na. ptr, nasalo-postrostral (-f- medial postral 
element); Op, operculum; Pa, parietal; Pc, pectoral fin; Pci, enlarged postcleithral scales; Po, pre¬ 
operculum; R, lateral rostral; Rbr, branchiostegal ray; Sop, suboperculum; Stemp. it, supra- 
temporo-intertemporal; V, ventral fin; ap, anterior head-line of pit organs; dl, pores of the dorsal 
lateral line on the body; etlini. com, ethmoidal transverse commissure between the two infraorbital 
canals; ifc, infraorbital sensory canal (in the infraorbital plates and in the antorbital); /, main lateral 
line of the body (pores and a shallow longitudinal furrow); Ic, cranial section of the main lateral 
canal of the body; mp, middle head-line of pit organs; na 2 and na 2 , nasal apertures; orb, orbital 
opening; poc, preopercular sensory canal; pp, posterior head line of pit organs; s. com, supra- 
temporal cross commissure; soc, supraorbital sensory canal. 
Plate 35. 
Fig. x. Perleidus woodwardi nom. nov., nearly complete specimen preserved as impression of the 
right side in the stone (P. 176). 
» 2 . » » » » some teeth in profile (P. i8f). 7 / 2 , 
» 3. » » » » part of fish showing the unpaired fins (P. 1S1). 
» 4. Boreosomus? scaber n. sp., scale (P. 18). 4 / r 
Explanation of index letters. 
A, anal fin; D, dorsal fin; Ifo, infraorbital bones; Mx, maxillary; Op, operculum; Pc, pectoral 
fin; Po, preoperculum; Scl, supracleithral; Sop, suboperculum; Sscap, suprascapular; V, ventral fin; 
orb, orbital opening. 
