[345] Kent (93) p. 140.
[346] Agassiz (88) vol. I. p. 82.
[347] Walther (85).
[348] Ibid. (88) p. 478.
[349] Philippi (37) p. 387.
[350] Rosanoff(66) Pl. VI. fig. 10.
[351] Rothpletz (91) Pl. XVII. fig. 4.
[352] Früh (90) fig. 12.
[353] Kjellman (83).
[354] Holmes and Batters (90) p. 102.