CRUSTACEA COPEPODA. II. 39 
Division Lerneeoida. 
Family Lerneeide. 
Peniculus Nordm. 
Only one species has been found in the “Ingolf’’ area. 
46. Peniculus clavatus O. F. Mill. 
1776. Lernea clavata O. F. Miiller, Zool. Danicze Prodromus p. 227. 
1777—79. — ——" ©° Muller, Zool. Danica, I, p. 38, Tab. XX XIII, fig. 1. 
1863. Pemculus clavatus Kroyer, Nat. Tidsskr., 3. Rekke, B. II, p. 340, Tab. XIV, fig. 8, a—g. 
1868. = — Olsson, Lunds Univers. Arsskr. f. 1868, p. 27, Tab. II, fig. to—r1. 
!IQI7. — — Wilson, Proc. U.S. Nat. Mus., Vol. 53, p. 46, Pl. I, figs. 1—7. 
The specimens seen by me agree with Wilson’s description and figures, but Olsson’s figure of the head 
differs materially in shape, and Kroyer’s figures are unsatisfactory. In spite of the differences I suppose that 
all three authors have examined specimens of the same species, especially as all their specimens had been 
taken on the unpaired fins of Sebastes marinus. 
Occurrence. — Taken by the “Ingolf’’ at two stations. 
Davis Strait: Stat. 33: Lat. 67°57’ N., Long. 55°30’ W., 35 fath., temp. 0°.8; 4 specimens on the 
dorsal fins of Tviglops Pingelit. 
— — Stat. 34: Lat. 65°17’ N., Long. 54°17’ W., 55 fath.; I specimen on the lower side of a 
ventral fin of Sebastes marinus. 
Finally 3 specimens of the parasite have been taken at Jakobshavn (Lat. 69°13’ W.), West Greenland, 
by Mag. sc. Traustedt, two among them respectively on the base of the right pectoral fin and on the base 
of the anal fin of Tviglops Pingelit. Kréyer’s two specimens were found on the caudal fin of a specimen of 
Sebastes marinus from West Greenland. 
Distribution. — O. F. Miller had his specimens from Drobak, Christiania Fjord, and Olsson 
records it from near Aalesund, West Norway. Wilson’s specimens were secured off Cape Ann, Mass., and off 
Salem, Mass. All three authors record only Sebastes marinus as the host. 
Sarcotretes Jungersen. 
Wilson (1917) refers 6 species to this genus, but only one has been found in the “Ingolf” area. 
47. Sarcotretes Scopeli Jungersen. 
TgIt. Sarcotretes scopeli Jungersen, Vid. Medd. Nat. Forening Kjobenhavn, B. 64, p. 1—21, Pls. I—II, figs. 
I—26; ibid. p. 21I—214. 
Occurrence and Distribution. — Not taken by the “Ingolf’’. 
This parasite has only been found on Scopelus glacialis. In the entrance to the Davis Strait it has 
been captured at Lat. 60°07’ N., Long. 48°26’ W. and West of Greenland at 7 stations up to 70°41’ N., by 
