PLATE X. 
Fig. Page 
1. Ptyeholepis eurtus , Egerton ; right lateral aspect.—Lower 
Lias; Lyme Kegis. [39493.] 321 
2. Ptyeholepis monilifer , sp. noy.; right mandibular ramns, 
outer aspect.—Ibid. [39868.] 322 
3. .Ditto; three dorsal flank-scales of the same specimen, 
twice nat. size. [39868.] 322 
4. Ditto; base of anterior dorsal fin-rays of the same speci¬ 
men, twice nat. size. [39868.] 322 
