Plate 1 issued from : M.S. Wilson in Smithson. misc. Collns, 1946, 106 (9). [p.7, Fig.1, A-G].
Male (from Mount Desert Island, Maine): A, A1; B, Mx1 (masticatory lobe); C, proximal spine of B (enlarged); D, P1; E, endopod of P2; F, P5.
Nota: A1 16-segmented, bearing 12 aesthetascs. P5 with exopod 2 bearing 2 spines; endopod 2 with 4 spines.

Copepodid 5: G, P5.

Plate 2 Both A1 male nongeniculate.
Sexual dimorphism present in P5.
A2 exopod 6-segmented.
Exopod of Md indistinctly 3-segmented.
Mx2 not extremely modified.
Syncoxa of Mxp with 2 setae ......
P1 with 2-segmented exopod and 2-segmented endopod.
Exopod of P2 to P5 having inner setae; P2-P5 with outer spines on 1st exopod segment..... Platycopia...... 3 - 1st and/or 2nd exopod segments of P2-P5 of female having inner setae or spines.....4 - 2nd exopod segment of P5 male with 2 proximal spines along outer margin...... 5 - 3rd endopod segment of male P5 having 4 spines.