198- 
ACT1N0PTERYGII. 
aspect, and perhaps representing the left clavicle. The 
mandible is fractured, and the articulo-angular element a 
little displaced with respect to the dentary. Both these 
bones are smooth, marked only by a few grooves aI ] 
ridges. On the dentary (d.) one groove extends direct y 
backwards from the symphysis just below the oral border, 
widening on the upper hinder extension of the bone, 
which seems to reach the articular end of the mandib e , 
while a band of about six similar grooves extends aC 
wards and a little downwards from a point near t 
symphysis to the short lower hinder extension of the bone. 
On the articulo-angular (ay.) the grooves- radiate rom 
the postero-inferior angle, one set continuing the o ^ 
band on the dentary already mentioned. Some o 
characteristic large teeth are preserved, and the ou 
border of the dentary* is shown to bear a close re^u 
series of small slender teeth. Behind the sku 
remains of the right operculum bent inwards, this ei r, 
ornamented with very* delicate tubercles and radiatin^ 
lines. Between the mandibular rami arc observed r ®^ 
of the hyoid apparatus and branehiostegal rays too 
perfect for description. Numerous vertebral centra, 
various states of preservation, are clustered roun ^ 
head. They are longer than deep, much constrict » 
strengthened with delicate longitudinal ridges at t e 
A. triangular hypural bone is also preserved. ^ ^ (joll. 
42977. Eight dentary exposed from the inner aspect, with e "S 
teeth. Van Breda CoU. 
42978. Imperfect ectopterygoid. Van Breda 
42867, 42978 a. Two imperfect left palatines. I an B>ed a 
42866, 42978 b,c. Six detached teeth. Van Breda 
Enchodus lemonnieri, Dollo. ^ . 
1893. JSnchodui lemonnieri, L. Dollo, Bull. Soc. Bel£e ttSol- 
Proc.-Verb. p. 185, figs. 2, 4. 
Type. Palatine and dentary ; Boyal Museum of Natural H 
Brussels. teeth 
A large species, known only by jaws, in which the l ar o 
are comparatively short and broad and much laterally comp 
Palatine hone produced forwards in- advance of its lafo 
