Bathyal Amphipoda — Barnard 
317 
outer ramus, but in the present species it is 
slightly shorter. The fifth articles of pereopods 
3-5 are noticeably shorter than in A. falcatus. 
Aristias topsenti is characterized by lateral wings 
on urosome segment 3. Aristias microps has a 
blunter head and poorly articulate antennal 
flagella and a broader telson than in the present 
species, and lacks the long posterior processes 
of coxae 5 and 6. 
Because the loss of eyes may occur in different 
populations of the same species, I have inspected 
the literature on all other eyed species and find 
that the new species resembles A. commensalis 
Bonnier (1896), from which it differs by nar- 
row telsonic lobes, bearing only one instead of 
two or three terminal spines. It differs from A. 
antarcticus Walker (1907; K. H. Barnard, 1932) 
by the unproduced upper lip, and from A. col- 
linus K. H. Barnard (1932) by the unproduced 
dorsum of urosomal segment 1. Artistias pacifi- 
cus Schellenberg (1936) was described from 
Vancouver Island and so bears inspection as a 
generic relative of close geographic placement. 
That species has eyes, has two apical spines on 
each telsonic lobe, and has the inner ramus of 
uropod 3 exceeding the first article of the 
outer ramus. The second and third pleonal epi- 
mera have small posterior corner teeth, a feature 
showing only a tendency in the present species. 
The longer rami of uropod 3, longer pereopods, 
and more strongly spinose uropods 1 and 2 dis- 
tinguish this species from A. curtipes Gurjanova 
(1962). Both A. japonicus and A. spinipes 
Gurjanova ( 1962 ) have the inner ramus of 
uropod 3 exceeding article 1 of the outer ramus. 
A more careful rendering of the epistome and 
upper lip of species described in the last several 
decades would serve well in studying speciation 
in the group. Apparently the species are semi- 
parasites on ascidians and sponges, so that we 
may anticipate variability as seen in Polycheria 
antarctica, a dexaminid amphipod. 
GENUS Cyclocaris Stebbing 
Cyclocaris guilelmi Chevreux 
Fig. 5 K 
Cyclocaris Guilelmi Chevreux 1899:148-152, 
figs. 1-5; Sars 1900:20-25, pis. 2-3; Ste- 
phensen 1913:107-108; Chevreux 1935: 
28-30, pi. 16, figs. 3, 8, 24, 26. 
Cyclocaris guilelmi , Stebbing 1906:31; Brug- 
gen 1907:215-216; Stephensen 192 3 : 52— 
54; Schellenberg 1927:664-665, fig. 59; 
Stephensen 1933b: 8-9, fig. 3; Stephensen 
1935:43, figs. 2, 3; Gurjanova 195 1:18 1— 
182, fig. 53; Birstein & Vinogradov 1955: 
222, fig. 8; Birstein & Vinogradov 1958: 
223-224; J. L. Barnard 1959:116-117, pis. 
4, 5 (with references); Gurjanova 1962: 
88, fig. 18. 
Cyclocaris faroensis Norman 1900:197-198, 
pi. 6, figs. 5-15. 
MATERIAL: Albatross 4793, male, 6.3 mm. 
remarks: The slight differences between 
coxa 1 of C. guilelmi and of C. tahitensis Steb- 
bing ( 1888) probably are not worthy of soecific 
value and perhaps are only figmental. Herein 
the first coxa is drawn; otherwise the material 
corresponds with that figured by J. L. Barnard 
(1959), except that the lower lip is like that 
figured by Sars (1900). 
RECORD: East of Kamchatka, 54° 48' N, 164° 
54' E, 2700 fms, June 16, 1906. An arctic pela- 
gic species picked up in a deep benthic trawl. 
GENUS Koroga Holmes 
Koroga megalops Holmes 
Fig. 2 
Koroga megalops Holmes 1908:503-504, fig. 
13; Stephensen 1923:60-61, fig. 5; K. H. 
Barnard 1937: 145-146, fig. 3; Stephensen 
1933:11; Thorsteinson 1941:56, pi. 2, figs. 
18-20; Shoemaker 1945:186; Gurjanova 
1951:192-193, fig. 62; Birstein & Vino- 
gradov 1955:222-223; Birstein & Vino- 
gradov 1958:224; Birstein & Vinogradov 
1960:187; Gurjanova 1962:93, fig. 20. 
MATERIAL: One specimen from Albatross 
Station 4785, east of Komandorskije Ostrova, 
1850 fms, 53° 20' N, 170° 33' E, June 12, 
1906; one specimen from Albatross Station 
4758, off Queen Charlotte Islands, 52° 02' N, 
132° 53' W, May 19, 1906, 300 fms. 
DISTRIBUTION: A pelagic species, probably 
cosmopolitan, having been found in the north 
and tropical Pacific, the Arabian Sea, the high 
North Atlantic, and the middle Atlantic. In 
open-closing hauls Birstein and Vinogradov 
