52 CRUSTACEA COPEPODA. II. 
Antennulee (fig. 9a, a") two-jointed, on the end witha rather thick spine and a few extremely minute 
bristles. — Antenne (fig. 9 a) characteristic; the proximal portion is two-jointed; each antenna has one 
spiniferous protuberance (e) on the outer side, two terminal protuberances and between these a protruding 
joint (), which at the lower margin is produced into an oblong-triangular process, and above this it has 
two smaller, acute denticles. The lower protuberance (/) is short with numerous spines, the upper protuber- 
ance (g) is much larger, somewhat broader than long, with a rather small number of spines, of which the 
upper ones are a little curved in opposite direction of those on the lower part. — Mandibles (fig. 9 d) with 
about 4 teeth. — Maxillule (fig. 9 b and 9 e) with three protuberances near each other, each terminating 
in a spine. — Maxille rather stout, nearly as long as, or somewhat shorter than, the trunk; bulla conical, 
at the end a little broader than a maxilla. — Maxillipeds (fig. 9 c) rather long; second joint on the inner 
side produced into a process with a couple of denticles on the end; third joint terminates in a short, very 
curved claw and on the angle a minute denticle. 
Length 4—5 mm. 
Remarks. — Whether S. oqguassa belongs to the present species is uncertain, as Wilson’s figure 
of the antenna shows considerable difference from mine. 
Occurrence. — Taken by the “Ingolf” at a single place. 
West Greenland: Sukkertoppen (Lat. 65°25’ N.), on gill-arches of Salmo alpinus; 5 specimens (together 
with 1 specimen of Salmincola Carpionis). 
At West Greenland it has been taken some few times, thus at one of the northern colonies on Salmo 
alpinus (Pfaff leg.); at Julianehaab (Lat. 60°43’ N.) on the roof of the mouth of Salmo sp. (Rev. P. H. Soren- 
sen) ; without special locality on S. carpio and on Gasterosteus aculeatus var. dimidiatus (Kroyerian specimens). 
(Besides 2 specimens have been sent to our Museum as taken on Sebastes marinus by the Rev. P. H. Sorensen, 
Julianehaab). — In East Greenland the parasite has been taken in Hekla Havn, Lat. 70°27’ N., on Salmo 
alpinus. 
From Iceland the Museum possesses a good number of specimens taken on Salmo alpinus in several 
lakes: Myvatn, Ljosvatn, Svartarvatn, Thingvallir, and Nidalstunga. 
Distribution. — Olsson records S. alpina from Salmo alpinus in two Swedish lakes, Nackten 
and Storsjon. — Wilson records his Salmincola oquassa from Salvelinus oquassa, at Rangeley Lakes, Maine. 
67. Salmincola arcturi Miers. 
1877. Lerneopoda arcturt Miers, Ann. Mag. Nat. Hist. ser. 4, Vol. XX, p. 106, Pl. IV, fig. 2. 
As to the validity of this form I have no opinion. 
Occurrence. — Not taken by the “Ingolf”’. —- The only locality hitherto known is Floeberg Beach, 
Lat. 82°26’ N. near West Greenland, where it was taken on the gills of Salmo arcturus Ginther. 
Lernzeopoda Blainville. 
This genus comprises 5 species from our area; 2 among them are new to science, and a third remains 
here only until further details are obtained, 
