Plate 1 Issued from : G.D. Grice & K. Hülsemann in Bull. Mus. Comp. Zool., Harvard, 1970, 139 (4). [p.204-205, Pl. IV, Figs. 74-78]. As Xanthocalanus elongatus.
Female (from 39°45.2'N, 70°33.8'W): 74-45, habitus (lateral and dorsal, respectively); 76, 5th thoracic segment and urosome (lateral); 77, same (dorsal); 78, 4th and 5th abdominal segments and caudal rami (ventral).

Nota : - Head and 1st thoracic segment fused, 4th and 5th thoracic segments separate.
- Abdomen 4-segmented, anal segment very short.
- Genital segment with short hair mainly distributed on sides and posterior margin.
- Rostrum of moderate size with 2 filaments.
- Posterolateral margin of 5th thoracic segment with small point.
- A1 24-segmented, reaching to middle of genital segment, segments 8 and 9 fused.
- Endopod of A2 nearly as long as exopod.
- Basal segment of Md palp bearing 3 setae ; gnathobase with 8 teeth and 1 seta.
- Mx1 with 2 setae on 2nd inner lobe, 3 setae on 3rd inner lobe, 5 setae on 2nd basal segment, 3 and 5 setae on endopod, 7 setae on exopod.
- Mx2 5th lobe with 2 strong spines and 1 seta ; 1 seta each modified as sensory structure on 3rd and 5th lobes ; endopod with 3 ribbon-like and 5 smaller sensory appendages.
- 1st and 2nd basal segments of Mxp of about equal length, in endopod 2nd segment longest.
- Endopods of P1 1-segmented, of P2 2-segmented, of P3 and P4 as well as exopods of P1 to P4 3-segmented. Posterior sides of rami of P2 to P4 covered with spinules, especially dense on P4 including both basipodal segments.
- P5 3-segmented, 2nd and 3rd segments with many spinules mainly on outer side. Distal segment with 1 short terminal and 1 long internal spine ; internal spine inserting close to terminal spine, exceeding distal segment of P5 in length.

Plate 2 Issued from : G.D. Grice & K. Hülsemann in Bull. Mus. Comp. Zool., Harvard, 1970, 139 (4). [p.206-207, Pl. V, Figs. 79-91]. As Xanthocalanus elongatus.
Female: 79, left A1; 80, A2; 81, Md palp; 82, Md (masticatory edge); 83, Mx1; 84, Mx2; 85, Mxp; 86, P1; 87, P2 (terminal spine omitted); 88, P3; 89, external spine of 2nd exopodal segment of P3; 90, P4; 91, P5.

Plate 3 Issued from : G.D. Grice & K. Hülsemann in Bull. Mus. Comp. Zool., Harvard, 1970, 139 (4). [p.206-207, Pl. V, Figs. 92-96]. As Xanthocalanus elongatus.
Male: 92-93, habitus (lateral and dorsal, respectively); 94, forhead (lateral); 95, 4th and 5th thoracic segments and genital segment (lateral); 96, A2.

Male : - Head and 1st thoracic segment fused, 4th and 5th separate.
- Abdomen 5-segmented, anal segment very small.
- Rostrum of moderate size with 2 filaments.
- Posterolateral margin of 5th thoracic segment with small, blunt corner.
- A1 reaching 3rd abdominal segment ; segments 8 and 9, 10 and 12, and on right side 20 and 21 fused. Sensory structures on segments 2 and 3.
- Endopod of A2 little shorter than exopod.
- Basal segment of Md palp carrying 2 very small setae ; exopod and endopod of about equal length ; gnathobase with 7 teeth and 1 strong seta.
- 2 setae on 2nd inner lobe of Mx1, 3 setae on 3rd inner lobe, 4 setae on 2nd basal segment, 3 setae on 1st, 2 setae on 2nd, 3 setae on 3rd endopodal segment, 7 setae on exopod.
- Mx2 stout, 5th lobe with coarse spine ; endopod with 2 kinds of sensory filaments.
- Basal segments of Mxp of nearly equal length, in endopod 2nd segment longest.- Endopod of P1 1-segmented, of P2 2-segmented, of P3 and P4 as well as exopods of P1 to P4 3-segmented. Posterior sides of endopods and exopods of P2 to P4 beset with spines, very thickset in P4. Endopod of left P4 devoid of spinules.
- P5 very asymmetrical. Left side 5-segmented, extremely long, exceeding half the total length of body ; first 4 segments slender, terminal segment short, bearing several setae. Right side 3-segmented, small, slightly longer than 1st segment of left side. Endopods absent.