THE GEOLOGICAL SURVEY OF SCOTLAND NEAR GULLANE. 117 



Plate II. 



Fig. 1. Gonatodus punctatus (Agassiz). Young specimen; natural size. Gullane. (Geol. Surv. Scot., 

 M 297 f.) 



Fig. 2. Inner surface of the dentary element of the mandible of an adult specimen of Gonatodus 

 punctatus, magnified 2 diameters. Some scales are scattered over the proximal extremity of the bone, and 

 the teeth are considerably obscured by matrix. Same locality. (Geol. Surv. Scot., M 4437 E.) 



Fig. 3. Rhadinichthys brevis, Traq. Natural size. Same locality. {Geol. Surv. Scot., M 4411 E.) 



Fig. 4. Another specimen of Rh. brevis. Natural size. Same locality. (Geol. Surv. Scot., M 296 f.) 



Fig. 5. Flank scales of Rh. brevis from another specimen, magnified 8 diameters. Same locality. 



Fig. 6. Rhadinichthys formosus, Traq. Natural size. Same locality. (Geol. Surv. Scot., M 4418 E.) 



Fig. 7. Scale from the flank of the same specimen, magnified 6 diameters. 



Fig. 8. Scale from the caudal region of the same specimen, magnified 6 diameters. 



Fig. 9. Wardichthys cyclosoma, Traq. Natural size. Same locality. (Geol. Surv. Scot., M 4384 E.) 



