PYCNODONTIDJE. 
267 
thirds of the depth of the head at its insertion; its sides marked 
with fine, regular longitudinal ridges, and the anterior and posterior 
margins delicately serrated. Vomerine teeth triangular in form, 
mammillated, and closely arranged, the median series considerably 
larger than the flanking series and alternating with the latter; 
splenial dentition imperfectly known, but the teeth with hollowed 
crown and blunt lateral extremities. 
Form, Loo. Upper Senonian: Mt. Lebanon, Syria. 
P. 4742. Imperfect laterally compressed specimen, described and 
figured by Davis, loc. cit .; Hakel. The original descrip¬ 
tion is not altogether accurate, and requires some supple¬ 
menting and correction. The vomer is crushed so that 
part of its dentition is exposed, displaying the three 
series of teeth as described in the above diagnosis; and 
the two principal series of the right splenial are also 
shown from the oral aspect. So far as can be ascertained, 
the inferior expanded extremity of the left half of the 
Fig. 32. 
Coccodus armatus ; left clavicle, outer aspect. [No. P. 4742.] 
pectoral arch has the form indicated in the accompanying 
diagrammatic sketch (fig. 32), there being one anterior, 
and two posteriorly directed spines. The right half of the 
arch in this specimen has been displaced and overturned, 
and the angle between the two posterior spines increased 
by fracture. The facial and opercular bones, and some 
elements behind the occiput, are too much crushed for 
precise recognition; and little can be said of the axial 
skeleton of the trunk beyond noting that it exhibits the 
ordinary Pycnodont characters. There are short ribs in 
the abdominal region. The remains of the anal fin 
opposed to the dorsal are very fragmentary, and only 
part of the lower lobe of the caudal fin is preserved. 
Lewis Coll. 
