REMAINS IN THE COAL-FORMATION OF NOVA SCOTIA. 
637 
2. Hylonomus Wymani, Dawson (Plate 39, figs. 15 to 17). 
[Journal of Geological Society, l,c. f Air-breathers of tlie Coal Period/ p. 52. 
‘Acadian Geology/ p. 378.] 
As compared with, the last species this was smaller in size, more elongated in form, 
had the teeth less numerous (about twenty-two in the mandible), and shorter and more 
obtuse in form. There are six to seven in 1 millimetre. 
Length of skull. 
... 8 
millimetres. 
,, mandible. ..... 
rib. 
... 5-5 
99 
,, femur. . 
... 6 
99 
„ humerus 
. . , 5 
99 
This species is much more rare than the former; but quantifies of minute bones, 
probably belonging to it, occur in the coproiitic matter. 
Other characters of this species will be found in the memoir and work above cited. 
3, Hylonomus multidens, s.n. (Plate 39, figs. 23 to 26). 
This animal is known only by portions of bones of the head and a few other frag¬ 
ments. The scattered bones of the extremities are inseparable from those of H. Lyelli 
occurring with it. As compared with that species, the bones of this are smoother 
and more delicate. The teeth are more numerous and slender. The crushed distal 
end of a femur or humerus found near the skull indicates that the limbs were well 
developed. 
Length of mandible .......... II millimetres, 
„ skull . .about 15 ,, 
„ femur. 9 „ 
Teeth, five to .six in 1 millimetre. 
4. Hylonomus latidens, s.n. (Plate 39, figs. 18 to 22). 
Of this species fragments of three specimens were found in three distinct trees. It 
seems to have been somewhat stouter built than II. Lyelli, but with the limbs shorter 
in proportion. Its generic affinities are perhaps somewhat doubtful, as it presents in 
some respects characters intermediate between Hylonomus and Hylerpeton. 
Mandibular and maxillary teeth broadly conical, about twenty in each mandible—three 
