CRUSTACEA COPEPODA. II. 35} 
Distribution. — Taken at a number of places around the British Islands on forms of Salmo, chiefly 
on S. salar (T. & A. Scott). Kroyer records it as rather common on Salmo salay at Denmark; Olsson mentions 
it from Norway. 
Wilson records the species from New Foundland, Labrador, and Maine; besides from the Pacific 
coasts of America as found on various Salmonide at Alaska, at Monterey in California, etc. 
Trebius Kroyer. 
Of this genus only the single form from northern Europe has been found in the “Ingolf”’ area. 
38. Trebius caudatus Kroyer. 
1838. Tvehius caudatus Kroyer, Nat. Tidsskr. B. II, p. 30, Tab. I, fig. 4. 
1863. — — Kroyer, Nat. Tidsskr. 3. Rekke, B. II, p. 223, Tab. X, fig. 1, a—k. 
! 1907. — = Wilson, Proc. U.S. Nat. Mus. Vol. XXXI, p. 681, Pl. XV, figs. r11—13; Pl. XVI 
figs. 14—22; fig. 1 in the text. 
!IQ13. —— — TT. & A. Scott, Brit. Paras. Copep. p. 81, Pl. XXII, fig. 1—2; Pl. LIV, figs. 1—11. 
Scott commits a somewhat misleading error in the drawings of female and male (figs. 1 and 2 on PI. 
XXII) in not marking off from the carapace the third segment, which is free; furthermore the genital segment 
on the male seen from above has the rudimentary legs on the dorsal surface, which is wrong, as they are placed 
on the ventral surface and not visible from above. 
Occurrence. — Not taken by the “Ingolf’’. 
It is not known from Greenland or the Feeroes. At Iceland it has been gathered at three places, viz. 
at North Iceland in Skagestrand Bay, 50 fath., 1 female (Steincke) ; at South-West Iceland in Grindavik on 
Raja batis, 18 females and 1 male (Mag. sc. B. Semundsson) ; finally off South Iceland at Vestman-Oerne, 
on the head and back of Raja batis, 34 females, 6 males (Mag. sc. R. H6rring). 
” 
Distribution. —T. & A. Scott write: “Parasitic on skates, rays, dogfishes, etc.’ and they put 
together localities from Scotland, the Irish Sea and South England. Kroyer records it from the northern Katte- 
gat on Galeus canis; Olsson from Skager Rak and Storeggen (West of Norway) on Raja batis and once on 
Raja fullonica. It is not known from the Atlantic coast of Amerika. 
Dinematura Latr. 
Of this fine genus 2 species occur within our area. — With most Zoologists I prefer the name Dine- 
matura, an amelioration by Burmeister of the earlier Dinemoura or Dinemura. 
39. Dinematura ferox Kr. 
(Pl. III, figs. 5 a—5 g.) 
1838. Dinematura ferox Kroyer, Nat. Tidsskr. B. II, p. 40, Tab. I, fig. 5. 
!186r. = — Steenstrup & Liitken, Kgl. D. Vid. Selsk. Skrifter 5. Reekke, naturh. og math. Afd. 
B. 5, p. 376—77, Tab. VII, fig. 14. 
! 1907. — — Wilson, Proc. U.S. Nat. Mus. Vol. XXXIII, p. 377, Pl. XXII, figs. 7o—78. . 
The Ingolf-Expedition. III. 7. 5 
