39 
Pallene Mspida, Stimpson, Invertebrata ot Grand Manan, 
p. 37 (adult). 
Pseiidopallene Mspida, Wilson, Synopsis oi the Pycnogonida 
of New England, p. 10, PL III, fig'. 1 a — c (adult). 
- — — Idem, Rep. U. S. Comm. Fish and 
Fisheries VI, p. 478, PI. II, fig. 9. 
Pseiidopallene discoidea, Wilson, Synopsis of the Pycnogonida 
of Hew England, p. 12, PI. HI, fig. 3, a — c (jun.). 
— — Idem, Rep. U. S. Comm. Fish and 
Fisheries VI, p. 479, PI. II, fig. 10. 
Pseiidopallene intermedia, Hansen, Kara Havets Pycnogoni- 
der, p. 21, Tab. XIX, fig. 2 a — 1 (adult. & jun.). 
Pseiidopallene circularis, G. 0. Sars. Pycnog. borealia et 
arctica, No. 9. 
Artscharacteristik. Legemet sajrdeles phunpt og un- 
derssetsigt, med Sidcfortsatserne tuesten sammenstadende; de 
2 midterste Kropssegmenter oventil med en Lsengderad at haie 
pigformige Fortsatser. Hovedsogmentet neppe saa langt som 
de 3 falgende tilsammen, Halsen scerdeles kort, ntesten obsolet. 
Saxlemmerne forholdsvis korte, Skattet eylindriskt, med 
stserke pigformige Fortsatser ved Enden, Saxen neppe lsen- 
gere end Skaftet, triangnlser, den ubevtegelige 1 iuger med 
en enkelt afrundet Knude i Midten af Inderkanten; den 
bevjegelige Finger glat. lie talske I odder forholdsvis korte, 
de ydre Led besatte med simple, uregelmmssigt ordnede 
Torner i Inderkanten Gangi0dderne korte og robuste, 
neppe mere end dobbelt saa lange som Legemet, og forsy- 
nede, isser langs Ydersiden, med stank e pigformige Fort- 
satser, fint cilicrede i Kantcrne og bserende en stiv Borste 
i Spidsen ; Fodleddet stserkt krummet og bevsebnet i Inder- 
kanten med omkring 8 — 10 stserke Torner ; Endekloen kor- 
tere end Fodleddet. Farven gulbrun. Legemets Lsengde 
3 1 // m ; Spandvidde. 19"””. 
Bemserkninger. Her kan elter min Moning ingen- 
somhelst Tvivl vsere om, at Goodsir’s Pallene circularis er 
identisk med Krayer’ s P. discoidea, og, da Goodsirs At hand- 
ling er publiceret 3 Aar tidligere end Krayer s, maa selv- 
falgelig det af farstnsevnte Forsker toreslaaede Navn, circu- 
laris, bibeholdes for Arten. Dr. Hansen liar farst paavist, 
at de 2 Ivrnyerskc Arter, P. intermedia og discoidea herer 
sammen, den tors to reprtesenterende f "u hit udviklede, den 
anden yngre Individer ; nogot, hvis Rigtighcd jeg ogsaa ved 
egne Iagttagelser kan bekrsefte. Den amerikanske 1 orm 
P. Mspida. synes heller ikke i uogen Iienseende at skille 
sig fra fuldvoxne Exemplarcr at nservserende Art, ligesaalidt 
som den af Wilson som Pseiidopallene discoidea beskievne 
Form lader sig adskille fra yngre Individer (= Pallene dis- 
coidea, Krayer). 
Beskrivelse. Legemets Lsengde er hos tuldt udvik- 
lede Individer omtrent 3 1 /,"*, med en Spandvidde at 19””“. 
Nogen bemserkelig Forskjel i Starrelsen hos de 2 Kjan Gui- 
des ikke. 
Formen er (se PI. Ill, Fig. 3) ualinindelig kort og 
underssetsig, i hvilken Henseer.de donne Art noget minder 
om Arterne af Slsegten Ammothea, Leach. Selve Kroppen 
Pallene Mspida, Stimpson, Invertebrata of Grand Manan, 
p. 37 (adult). 
Pseiidopallene Mspida, Wilson, Synopsis ot the Pycnogonida 
of New England, p. 10, PI. Ill, fig. 1 a — e (adult). 
— — Idem, Rep. U. S. Comm. Fish and 
Fisheries VI, p. 478, PI. II, fig. 9. 
Pseiidopallene discoidea, Wilson, Synopsis of the Pycnogonida 
of New England p. 12, PI. Ill, fig- 3, a — c (jun.). 
— — Idem, Rep. U. S. Comm. Fish and 
Fisheries VI, p. 479, PI. II, fig. 10. 
Pseiidopallene intermedia, Hansen, Kara Havets Pycnogoni- 
dcr, p. 21, Tab. XIX, fig. 2 a — 1 (adult & jun ). 
Pseiidopallene circularis, G. 0. Sars. Pycnog. borealia et 
arctica, No. 9. 
Specific Cliaraeters. Body exceedingly clumsy and 
thickset, with lateral processes well-nigh contiguous; the 2 
median segments of the body above with a longitudinal 
series of prominent spiniform projections. Cephalic segment 
hardly as long as the 3 succeeding ones taken together, 
neck extremely short, almost absent. Chelifori compara- 
tively short, scape cylindric with strong spiniform projec- 
tions at the extremity, chela hardly longer than scape, 
triangular, immobile finger with a single rounded protube- 
rance at the middle of the inner edge; mobile finger 
smooth. False legs comparatively short, outer joints 
beset with plain, irregularly disposed spines on the inner 
margin. Ambulatory legs short and robust, scarcely more 
than twice as long as body, and furnished, especially 
j along the outer side, with strong spiniform projections de- 
licately ciliated at the edges, and bearing a stiff bristle at 
the point; propodal joint greatly curved, and armed on the 
inner edge with about 8—10 strong spines; terminal claw 
shorter than propodal joint. Colour a yellowish brown. 
Length of body 3 1 / 2 ’“” 1 ; extent 19''"''. 
B.emarks. In my opinion, there can not be the 
slightest doubt that Goodsir’s Pallene circidaris is iden- 
tical with Krayer’s P. discoidea, and as Goodsir’s Me- 
moir appeared 3 years previous to Krayer’s, the name 
circularis proposed by the former naturalist, must, as a 
matter of course, be retained for the species. Dr. Hansen 
was the first to point out that the 2 Krayer species, P. in- 
termedia and P. discoidea are the same, the former repre- 
senting fully developed the latter immature individuals — 
a fact borne out by my own observations. The North 
American form, P. Mspida, does not seem to differ either 
from adult specimens of the present species, and just as little 
does the form described by Wilson under the name of Pseudo- 
pallene discoidea permit itself to be distinguished from younger 
specimens (— Pallene discoidea, Krayer). 
Description. The length of the body in fully deve- 
loped specimens is about 3 1 //™ the extent about 19““. 
Any appreciable difference in size between the 2 sexes can 
not be detected. 
The form (see 1*1. Ill, fig. 3) is remarkably short and 
thickset, in which respect this species calls somewhat to 
mind the species of the genus Ammothea, Leach. The body 
