Page:The Eurypterida of New York Volume 1.pdf/119

 Neanic stage [ pl. 36, fig. 1]
 * 1) Wider preabdomen
 * 2) Wider postabdomen

Nepionic stage [ pl. 36, fig. 9]
 * 1) Carapace triangular with
 * 2)  Spinelike prolongations of frontal and genal angles
 * 3)  Immense, diverging eyes
 * 4)  High median crest or glabella
 * 5)  Broad, thick border

Neanic stage [ pl. 69, fig. 3, 5]
 * 1) Larger compound eyes
 * 2) Larger ocelli and more prominent ocellar mound
 * 3) More rapid contraction of preabdomen
 * 4) Larger swimming feet
 * 5) More spatulate telson

Nepionic and neanic stages [ pl. 81, fig. 1–5] The larval eyes are in this form relatively not larger than in the adult, but provided with a prominent ring (orbital ridge)
 * 1) Very large carapace and very small abdomen
 * 2) Smaller number of abdominal segments

Nepionic and neanic stages [ pl. 64, fig. 1–13]
 * 1) Larger (longer and broader) carapace
 * 2) Much larger compound eyes
 * 3) Larger and more prominent ocellar mound
 * 4) More slender abdomen
 * 5) Smaller number of (preabdominal) segments