Planche 1 issued from : G.P; Farran in British Antarctic (\"Terra Nova\") Expedition, 1910. Natural History Reports. Zoology. Vol. VIII; Crustacea, 1929. [p.251, Fig.18].
Female: a, habitus (lateral view); b, idem (dorsal view); c, rostrum (anterior view); d, fifth foot.

Male: e, habitus (lateral view); f, 4th and 5th thoracic segment and first genital segment (dorsal view); g, fifth feet.

Planche 2 Issued from : J.M. Bradford, L. Haakonssen & J.B. Jillett in Mem. N. Z. Oceanogr. Inst., 1983, 90. [p.120, Fig.74].
Female: A, habitus (lateral left side); B, genital segment (dorsal); C, genital segment and P5 (lateral left side); D, rostrum; E, P5 (other specimen).

Male: F, habitus (lateral left side); G, P5; H, terminal part of left P5 exopod.

Female:
- Posterolateral corners of last thoracic segment rounded in lateral view, but constricted in dorsal view and appearing like sharp spines.
- head with triangular crest.
- Rostrum with short rami and apical projections shorter than excavation.
- Genital segment as long as following three segments, with genital protuberance.
- P5 with terminal seta twice as long as leg, reaches distal end of urosomal segment 3.

Male:
- Rostrum as in female.
- Fusion line between pediger segments 4 and 5 visible.
- Right P5 endopod reaches beyond exopodal segment 1; exppodal segment 2 curved, exopodal segment 3 very small. Left P5 endopod shorter than exopodal segment 1; exopod at least 2-segmented.

Planche 3 Issued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., IX, 1, 1961 a. [p.144, Fig.107, g-j]. As Scottcalanus helenae Male.
g, forehead (lateral); h, last thoracic segment and 1st and 2nd urosomal segments (lateral); i, P5; j, distal segment of left P5.
- Last thoracic segment rather broadly rounded ; ventral margin of the segment much inflated when viewved from the side
- Abdomen 5-segmented ; segments and caudal rami in the proportional lengths 18 : 24 : 23 : 21 : 7 : 7 = 100. Distal margin of the 2 nd to 4th segments fringed with fine teeth. segments.
- A1 extends to the middle of the 4th abdominal segment.
- Serration on the terminal spine of the exopod of P2 to P4 are more in number than those of the corresponding legs of the female [in S. helenae].
- Endopod of right leg of is long and curved towards the exopod, reaching about to the middle of the 2 nd segment of the exopod. Endopod of the left leg P5 short, about ½ the length of the 1st segment of the exopod of the same leg. 2 nd segment of the exopod of the left leg P5 dilated much on the inner margin. The 3rd segment of the exopod is represented by 2 curved stout spines, a pad of stiff hairs, and a leaf-like lamellous process with serrations on the distal end.

For Tanaka, the male agrees well with the description and figures of S. helenae given by A Scott. According to Farran (1936) the male of S. lonsispinus has the 5th thoracic segment with a small spine at its distal end, and the rostral spine which differs from that of the female.