TELEOST-LIKE GANOIDS 165 
group is known to have attained its prominence at a later 
geological time than the other Ganoids; it is doubtless 
derived, more or less directly, from the main ganoidean 
stem. Three of the more typical Mesozoic forms are 
shown in Figs. 169, 170, 171, in Caturus, Leptolepis, and 
Fig. 170. —Lepftolepis sprattiformis, x 3. (From SMITH WoopWaRD.) _ Lith- 
ographic stone, Solenhofen. 
Megalurus. To these amioid forms the ancestry of the 
(majority of the) Teleosts is reasonably to be traced. 
A general scheme of the phylogeny of the Teleostomes 
is suggested on the adjoining page (Fig. 171 A). 
B. Teleocephali (Teleosts.) This group, popularly known 
as that of the bony fishes, or Teleosts, includes as great 
a proportion perhaps as 95 per cent of the kinds of fishes 
Fig. r71.— Megalurus elegantissimus, Wagner. X%. (After ZITTEL.) Jura, 
Solenhofen, 
living at the present time. The immense number of their 
genera and species is doubtless suggestive of the form 
changes which occurred during the flowering periods of 
the sharks, chimzeroids, or lung-fishes. 
Teleosts have diverged most widely of all fishes from 
