148 



University of California Publications. 



[Geology 



Specimen No. 9988. — Figure 3 represents a plate with a length 

 of 164 mm. The greatest width is 50 mm. The plate shows fine 

 lines radiating from a common center to the periphery, the high- 

 est point being at the center. The surface is covered with small 

 pits or dots. It resembles very much the frontal plate of Ony- 

 chodus sigmoides Newb, as figured by Dr. Newberry, 7 in having 

 lines radiating to all parts from a common center, except that the 

 radiating ridges are not so pronounced, and in that the specimen 

 is relatively long for its width. It resembles Mcgalichthys Jiib- 

 berti in having the surface covered with fine pits or dots. 8 



Specimen No. 9900. — A long slender bone (fig. 5) constricted 

 on each side of the middle, which is swollen on one edge resem- 

 bling a point of articulation. The ends flare out on one side to 

 a thin convex fan, the planes of the expanded portions being 

 twisted at an angle of about 70°. Length about 160 mm., diam- 

 eter at narrowest point 9 mm., diameter at swollen portion 13.5 

 mm. 



Specimen No. 9987. — Figure 4 represents the impression of 

 the inside of a cycloidal scale showing oval outlines parallel to the 

 periphery. Length 76 mm., width 35 mm. The impression re- 

 sembles the inner aspect of a scale of RJiizodus ornatus Trq. 

 figured by Woodward. If this specimen belongs to the same 

 form as the folded teeth, the greater affinity is with the Megalich- 

 thyidae rather than with the Osteolepidae, as the scales are of 

 cycloidal shape. 



'Newberry, J. S., U. S. Geo! Surv. Mon., Vol. 16, pi. 37. 



8 Trans. Eoy. Soe. Edinb., Vol. XIII, p. 194. 



9 Woodward, A. S., Catlg. of Fos. Fish. Brit. Mus., Vol. II, PI. XII, fig. 9. 



Issued May 18, 1907. 



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