520 EDWIN S. GOODRICH. 



Fig. 35b. — Still fmtlier enlarged view of a few segments of the dislal region 

 of the same. 



Fig. 36. — Two dermal rays from the caudal fin of Ceratodus Forsteri. 

 Slightly enlarged. 



Fig. 87. — Tliree dermal rays from the pectoral fin of the same fish. Slightly 

 enlarged. 



Fig. 3S. — Small piece from the surface of one of the superficial scales over- 

 lying the dermal rays of the median fin of Dipterus valenciennesi. 

 Cam. X 350. 



Fig. 39. — Similar piece from a cranial shield of the same. Cam, x 350. 



PLATE 39. 



Fig. 40.— Fragment of the dermal ray of Dipterus valenciennesi. 

 Cam. X 350. 



Fig. 41. — Fragment of the dermal ray of Ceratodus Forsteri. Cam. 

 X 200. 



Fig. 42. — Fragment of the proximal region of the dermal ray of Scau- 

 m en a ci a curt a. Cam. x 450. 



Fig. 43. — Fragment of the distal region of the dermal ray of Eusthcno- 

 pteron Foordi. Cam. X 200. 



Fig. 44. — Fragment of the proximal region of the dermal ray of 

 Glyptolepis (British Museum, No, P. 325S). 



Fig. 45a. — Transverse section through the proximal unjointed piece of the 

 dermal ray of tiie ventral caudal lobe of Eusthenopteron Foordi. 



Fig. 45b. — The same, cut through the more distal jointed region. 



Fig. 45c. — The same, near the edge of the fin. All Cam. X 80. 



Fig. 46.— Transverse section through the jointed region of three dermal 

 rays of Cheirolepis traillii. Cam. X 80. 



fiG, 47_ — Transverse section through the proximal piece of the dermal 

 rays and the overlying scales of the same fossil. Cam. X SO. 



PLATE 40. 



Fig. 48.— Lo) gitudinal section through the dislal jointed region of the 

 dermal rays of I he same fossil, Cheirolepis. Cam. X SO. 



Fig. 49a. — Somewhat diagrammatic and enlarged view of the dermal rays of 

 the caudal fin of Cheirolepis traillii. The sujierficial scales have been 

 removed from over the proximal piece, and the ganoiue covering from the 

 segments of the dislal region of three of the rays. 



Fig. 49b.— Some body-scales of the same, enlarged. 



