"Apart from the complete segmentation, the general development of Lepidosteus is strikingly Teleostean. In addition to the general Teleostean features of the embryo and larva, which can only be appreciated by those who have had an opportunity of practically working at the subject, we may point to the following developmental features[[2]] as indicative of Teleostean affinities:
"(1) The formation of the nervous system as a solid keel of the epiblast.
"(2) The division of the epiblast into a nervous and epidermic stratum.
"(3) The mode of development of the gut.
"(4) The mode of development of the pronephros; though the pronephros of Lepidosteus has primitive characters not retained by Teleostei.
"(5) The early stages in the development of the vertebral column.
[2]. The features enumerated above are not in all cases confined to Lepidosteus and Teleostei, but are always eminently characteristic of the latter.
"In addition to these, so to speak, purely embryonic characters there are not a few important adult characters:
"(1) The continuity of the oviducts with the genital glands.
"(2) The small size of the pancreas, and the presence of numerous so-called pancreatic cæca.