114 DEAN. 
EXPLANATION OF FIGURES. 
Fic. 1. Pectoral fin. X $. Ax. Axil of fin. Sas. Basalia. BW. Body 
wall. 2. Dermal fin-margin. ad. Radialia. 7. Trichinost. 
Fic. 2. Ventral fin. X1. Sas. Basaliaa BW. Body wall. JD. Dermal 
fin-margin. ad. Radialia. 
Fic. 3. Tail. xX 2. C. Lateral view of horizontal cut-water. CH. Notochord. 
D. Dermal fin-margin. 7%. Epural plates. yf. Hypural rods. 47. Membran- 
ous hypural margin of upper lobe. SV. Sub-notochordal rod. 7%. Trichinosts. 
Fic. 4. Unpaired fin (dorsal?). % 1. Showing conical radial cartilages, 
whose distal ends split posteriorly to form marginal rim of fin web. 
Fic. 5. Circum-orbital derm plates. After Jaekel (drawing slightly modified 
from fin type-specimen). 
Fic. 6. Circum-orbital ring of derm plates (X 1). 
Fic. 7. Lateral line (X 1). The arrangement of the dermal denticles 
indicating the presence of an open groove as in Chlamydoselache. 
