Genus Dichelaspis Darwin, 1852

Dichelasmis Darwin, 1852: 115.

Heptalasmis . Agassiz, 1842: 178.

Octolasmis Gray, 1825: 100. - Pilsbry 1907a: 93.

Diagnosis.

Capitulum with five plates; scutum with two distinct segments, united at rostral angle; carina generally extending up between terga, terminating downwards as imbedded disc (fork- or cup-shaped).

Type species.

Octolasmis warwicki Gray, 1825: 100. - 1830: pl. VI, fig. 16.