yg a A^ f so /?rrc*. ^^ S_ /VC S/^ 
**'^ r y 5 ' /** ■^ r 4 ' Ouv~ / £ ,__ 
^ / / /T. _ /✓t. _ /« _ _ . ^ ^ ^ 
/ 3 ry O^f 7 * ^’ /£f S. ,^ w . (C3r3. /T. /Ck^/'c^- . y- . ’nfr,, 
^KTHRODIRA ' 
S96 
('/lea*- 1 
fay<p^/7rty^y^ The type species. Cranial shield ovoid in form, truncated at its 
/i <rrt . S'™- ^hinder border, the outer lateral angles rounded and notched, and 
4^/^^ihe breadth between the latter about equal to the total length ; the 
anterior two-thirds of the shield gradually arched from side to side, 
^ /flattened or depressed piesially, the posterior portion of the median 
j occipital plate rising to a broad, low, longitudinal ridge, corresponding 
to ttLe laterall T arched contour of the median dorsal plate of the 
trunk immediately behind. Median dorsal plate about three times 
i'TO-' 
7 long as broad, convex in the median line, but highest in the 
^entre, from which point there is a downward slope in every direc- 
j / tion, the lateral slopes being most abrupt; anterior border not ex- 
0 * cavated ; the sides parallel for more than two-thirds of their length, 
then converging rapidly into a point with somewhat concave sides. 
Tuberculations of small or moderate size, often arranged in close, 
concentric series, especially upon the laterally situated plates. 
Form. <Sf Loc. Lower Devonian : Campbellton, New Brunswick. 
P. 5474-75, P. 5972. Three imperfect cranial shields, the first 
about OT in maximum breadth, the second and third dis¬ 
playing the linear arrangement of the tubercles. 
Purchased, 1888, 1889. 
P. 5973. Imperfect plate of the form named “ ventro-median (?) ” 
by Whiteaves, but appearing to the present writer to bo 
the anterior lateral element. Purchased , 1889. 
cr*'- 
Ja / %* £v. «tX jtA*” 
Z3 ) i^ fc 3 
< .^*5 
..y 
Phlyctaenaspis anglica, Traquair. ,^4 
*' ?a yf~ £■ %£> [Plat? v ’ m - %s - 5 - 8 - ] 
f5J 
d- 
$e 
J . 
1870. Zenaspis (Cephalaspis ) salweyi, E. ft. Lankester (errore), Fishes 
Old Red Sandst. pt. i. (Pal. Soc.), p. 55, pi. viii. fig. 4$ figs. 2,3), 
pi. xiii. figs. 17, 18. 
1890. Phlycteenius anglicus, R. H. Traquair, Geol. Mag. [3] vol. vii. 
p- ^ p l iii - fi o s< 3 > 4 - 
/ Type. Imperfect cranial shield ; Edinburgh Museum. 
Cranial shield ovoid in form, truncated at its hinder border, the 
outer lateral angles rounded, but not notched, and the breadth be¬ 
tween the latter about equal to the total length. Tuberculations 
of cranial plates relatively very large, but irregular both in size and 
arrangement, rarely in concentric series ; those of the supposed 
ventral bod} -plates exhibiting a more or less definite concentric 
serial arrangement, and some of the rows very minutew '* 
Some fragments of this species were assigned by Lankester to un¬ 
determined positions in the dermal armature of Cephalaspis salweyi; 
