190 
OSTEOSTRACI. 
of the ventral aspect of the body between the inferior rim, 
shown, of the natural size, in PI. X. fig. 2; red sandstone, 
Ledbury. Presented by Georye H. Piper, Esq., 1889. 
P. 5319-20. Impressions of two shields showing absence of cornua, 
the first displaying the inner aspect, the second the outer ; 
red sandstone, Ledbury. 
Presented by George H. Piper, Esq., 1887. 
P, 6109. Well-preserved impression of a portion of shield, outer 
aspect, showing the external ornament (PI. X. fig. 3); 
red sandstone, Ledbury. 
Presented by George H. Piper, Esq., 1889. 
P 5318. Flank-scales of greater portion of trunk, in natural order ; 
red sandstone, Ledbury. 
Presented by George H. Piper, Esq., 1889. 
P. 6111. Portion of inferior rim of shield, of the form doubtfully, 
though with much probability, assigned to this species by 
Lankester (op. cit. pi. ix. fig. 4): red sandstone, Ledbury. 
The fossil is shown, of the natural size, in PI. IX. fig. 6. 
Presented by George H. Piper, Esq., 1889. 
Cephalaspis lightbodii, Lankester. 
1870. Cephalaspis liglitbodii, E. R. Lankester, Fishes Old Red Sandst. 
pt. i. (Pal. Soc.), p. 55, pi. xiii. fig. 19. 
Type. Inferior rim of shield; British Museum. 
A provisional^ determined large species, known only by the type 
specimen and unsatisfactory fragments. Rim of shield ornamented 
with closely arranged, conical or pyramidal tubercles, having their 
apices sometimes recurved. 
Form. 6j' Loc. Ludlow Tilestones ; Ludlow. 
45940. Type specimen. Lightbody Bequest. 
Cephalaspis campbelltonensis, Whiteaves. 
[Plate IX. fig. 5.] 
1881. Cephalaspis campbelltonensis, J. F.Whiteaves, Canadian Natural¬ 
ist, n. s. vol. x. p. 98. 
1889. Cephalaspis campbelltonensis, J. F. W liiteaves, Trans. Roy. Soc. 
Canada, vol. vi. sect. iv. p, 92, pi. x. fig. 2. 
