192 
AOTINOPXERTGII. 
mostly radiating and each bearing a series of small tubercles , ^h _ g 
ridges on the dentary bone radiating from tho symphysis, on 
articulo-angular bone radiating from the mandibular artici a . ^ 
lalatine bone produced forwards as a short cylindrical extensio 
advance of the ethmoid articulation, and the long slendt r 
antero-posteriorly compressed, fixed at its extremity at r igt>f- a,ln , 
to the long axis of the bone ; the outer fuce of the premaxilla o ^ 
sparsely ridged; dentary rapidly contracting almost to a P 01 ^ ^ 
the symphysis, where it exhibits about three large ”T e | jta 
processes; the mandibular ramus considerably deepened be > n _ 
maximum depth nearlj’ equalling one third of its total 1 
about six large mandibular teeth, all both slender and little c 
.Teeth much compressed, and some delicately striated, none ^ ^ 
spicuously serrated on tho edges. Operculum nearly two t 1 j a ^ e( j 
broad as deep, marked by numerous sharp, radiating, tuherc 
ridges. 
Ihe heads from the Turonian of Bohemia described un 
name of Enchodun hilocyon, Ag., by A. Fritsch (Kept. u# ..j. er 
hohm. Krcideform. 1878, p. 35, pi. vii. figs. 1-3) seem ^-^e. 
from this species in the more slender proportions of the man 
Form. foe. Senonian and Turonian : S.E. England, 
man : Saxony and Bohemia. 
4001, 4049, 4157, 4160, 4180-81, 4183-84, 4186, 4198- l he p ^!pt, 
of type specimens figured by Mantell and ^j an ttdl 
the detached teeth, which are also probably in t e 
Collection hut not identifiable; 
The 
Chalk, Lewes. 
the P, 
original of Agassiz, loc. cit. fig. 1, shows e ^ tb® 
maxilla from the inner aspect, with re 'in rese jit* 
pterygo-quadrate arcade and mandible ; hg- gen f. (fie 
a portion of the ectopterygoid ; figs. 9, 10 imported 
extremity of the palatine; and figs. 14> 15 ^ an tell CoE 
opercula. “ 
P- 5415. Small skull and mandible, displaying l^e cm^ j, ffUfe d 
premaxilla, maxilla, and dentary, describe « ^ cwe8 . 
in Proc. Geol. Assoc, vol. x. p. 315, pi. *• ’ jg88. 
Presented by P. E. Coombe, W-> ^ 
25749, 25755, 25765. Imperfect right dentary, with tw ^ pjxon, 
large teeth doubtfully of this species, fignie 1 Q 0 ll. 
°P- cit. ; Chalk. Sussex. ^ 
4001, 4071, 4182, 4201. Two very imperfect small Coll- 
fragmentary mandibles ; Lewes. 
