CRUSTACEA COPEPODA. II. 29 
Distribution. — The Copenhagen Museum possesses specimens taken at various places in the 
North Sea on Gadus callarias, Gadus virens and Molva byrkelange; at Denmark it has been secured in the 
northern part of the Sound. Olsson mentions it as found on 11 species of fishes in Kattegat, Skager Rak 
and off West Norway at Lat. 63° N.; T. & A. Scott say that it “is a common form around our shores’’; v. Be- 
neden records it from Belgium; Wilson has seen large numbers from “the eastern sea-board of the New Eng- 
land States of North America’. 
33. Caligus rapax H. Milne-Edw. 
1840. Caligus rapax H. Milne Edwards, Hist. Nat. Crust. T. III, p. 453, Pl. XX XVIII, fig. o—12. 
1861. — — Steenstrup & Liitken, Kgl. D. Vid. Selsk. Skrifter, 5. Rekke, naturh. og math. Afd. 
1B) 5, 105 S60), Malo, JUG, sate, 71. 
1863. — Lwumpi Kroyer, Naturh. Tidsskr. 3.R. B. II, p.147, 177, Tab. Il, fig. 2, a—t. 
!1905. — vapax Wilson, Proc. U.S. Nat. Mus. Vol. XXVIII, p. 568, Pl. VII, figs. 7g7—89, and figs. 3, 
7, 9, 10, 18, 22, 23, 26, 32, 36, 46—50 in the text. 
I9gi2, — — Brian, Résultats Camp. Scient. par Albert I, Prince de Monaco, Fasc. XX XVIII, 
: p.5, Pl. VI, fig. 1—4. 
lI9g13. — — TT. & A. Scott, Brit. Paras. Copep. p. 48, Pl. IV, figs. 3—8, Pl. VI, figs. i—2. 
The extensive and very intricate synonymy is given by Wilson and Brian; discussions on the earlier 
literature especially by Kroyer (op. cit. p. 145) and Steenstrup & Ljitken. 
Occurrence. — Taken by the “Ingolf’”’ at a single place. 
North-West Iceland: Dyrefjord, on the skin of Cyclopterus lumpus; 1 female. 
This species has not been discovered at West Greenland; at East Greenland it has been taken in 
Hekla Havn (Lat. 70°27’ N.), living on Gymnacanthus tricuspis captured at about 6 fath. (Ryder Exped.). 
At or around Iceland C. vapax is not uncommon. The Copenhagen Museum possesses a good number 
of females secured at Iceland by Hallgrimsson, determined and mentioned by Kroyer of C. Lumpi, certainly 
his co-types. At North-West Iceland a female was taken on Hippoglossus vulgaris in Onundarfjord by Mag. sc. 
W. Lundbeck. Dr. J. Schmidt (the “Thor’’) captured specimens in pelagic hauls in 1904 at the following 6 
localities around Iceland. 
North of Iceland: Lat. 66°19’ N., Long. 23°27’ W. 115 m.; 4 adults and I immature specimen. 
West - — Lat. 64°16’ N., Long. 22°13’ W., 46m., 50m. wire out; 2 males. 
= = = Lat. 64°05’ N., Long. 22°40’ W., 40 m.; 3 males. 
South-West - — Jat. 63°29’N., Long. 21°25’ W., 94—120 m., 110m. wire out; 2 females 
and 3 males. 
— Lat. 63°18’ N., Long. 21°31’ W., 178 m.; 1 female. 
—~ - —  J[at. 63°20’ N., Long. 20°49’ W., 124 m.; 16 females, 11 males. 
At the Feeroes C. vapax has been taken at Thorshavn, Stromo6 (Caroc) and somewhat east of the Is- 
lands in 230 fath. (Cand. mag. Ad. Jensen), in both cases on Gadus callarias. 
Distribution. — According to various authors this species is common at Great Britain and Ire- 
