7 
gonidea (Pantopoda) beskrives imidlertid 2 Arter, P. nodo- 
sum og P. pusillwn, der begge er vel adskilte fra den ty- 
piske Art. Hertil kommer endnu en ny nordisk Art, 
P. crassirostre, som i det folgende nsermere skal beskrives. 
Arterne af denne Slffigt er let kjendelige ved deres ualmiu- 
delig undersmtsige Kropsform, korte og kraftige Gangfod- 
der, de ualmindelig haarde og knudrede Integumenter og 
den enlde, kageformige ydre JEgiuasse. De synes delvis 
at fore et kalvt parasitiskt Liv, idet de ofte er tundne fast- 
klamrede til Actinier og andre lavere Spdyr. 
!. Pycnogonum littorale (Strom). 
(PI. I, fig. 1, a-i). 
Phallanghm littorale, Strom, Physisk og oeconomisk Be- 
skrivelse over Pogderiet Sondmor, p. 209, Tab. I, 
fig. 17. 
Pycnogonum balcenanm, Linne, Syst. Nat. ed. XII, 1, p. 
1028. 
Pycnogonum littorale, 0. Fabr. Fauna Gronlandioa, p. 2.13. J 
0. F. M filler, Zool. Dan. Ill, p. 68, | 
Tab. CXIX, fig. 10—12. 
Pycnogonum balcenarmn, Latreille, Hist. nat. des Crustaces 
et des Insectes, Tome VII, p. 332. 
Goodsir, Ann. Nat. Hist. Vol. 14, p. 1, 
PI. 1, fig. 1—2. 
Pycnogonum littorale, Milne Edwards, Hist. nat. des Cru- 
taces, Vol. Ill, p. 537, PI. 41, fig. 6. 
n Johnston, Mag. Zool. and Botany, Vol. 1, 
p. 376, PL XIII, figs. 1—3. 
Kroyer, Bidrag til Kundskab om Pycno- 
goniderne. Nat. Tidsskrift, ny Rmkke, I p. 126. 
n n Gaimard’s Voyage en Scandinavie, Crust. 
PI. 38, fig. 4, a-e. 
Pycnogonum pelagicum, Stimpson, Invertebrata of Grand 
Manan, p. 37. 
Pycnogonum littorale, Jarzynsky, Prseinissus catalogus Pyc- 
nogonidarum inventarum in mari glaciali ad oras Lap- 
ponias Rossicre et in mari albo. 
„ Moebius, Jaresb. der Commission zur 
Unters. der Deutschen Meere, I, p. 153. 
Hoek, Ueber Pycnogoniden. Niederl. Ar- 
chiv f. Zool., Bd. Ill, p. 236, Tab. XV, fig. 1—3. 
AVilson, Synopsis of the Pycnogonida of 
New England. (Transact. Conn. Acad, of Arts & 
Sciences, Vol. V) p. 4. 
„ Idem, Report on the Pycnogonida of New 
England and adjacent waters. United States Com- 
mission of Fish and Fisheries. Report f. 1878, p.469, 
PI. I, fig. 1—3. 
Hoek, Report on the Pycnogonida of the 
Challenger Exped. Appendix I. Pycnogonida of the 
Cruise of the Kinght Errant, p. 99. 
in the Bay of Naples, are described 2 species, P. nodosum 
and P. pusillum, both quite distinct from the typical species. 
Besides these, there is a new Northern species, P. cras- 
sirostre, to be described farther on. The species of this 
genus are easily recognizable by their remarkably thickset 
form of body, short and powerful ambulatory legs, the 
hard and rugged integuments, and the simple, cake-shaped 
outer egg-mass. They would seem in great part to lead a 
parasitical life, being often found firmly clasped to Actin- 
ians and other low-organized marine animals. 
I. Pycnogonum littorale (Strom). 
(PI. I. fig. 1, a — i). 
Phallangimn littorale, Strom, Physisk og oeconomisk Beskri- 
velse over Fogderiet Sondmor, p. 209, Tab. 1, fig. 17. 
Pycnogommi balcenarum, Linne, Syst. Nat. ed. XII, I, p. 
1028. 
Pycnogonum littorale, 0. Fabr. Fauna Gronlandica, p. 233. 
„ „ 0. F. Miiller, Zool. Dan. Ill, p. 68, 
Tab. CXIX, figs. 10—12. 
Pycnogonum balcenarum. Latreille, Hist. nat. des Crustaces 
et des Insectes, Tome VII, p. 332. 
„ „ Goodsir, Ann. Nat. Hist. Vol. 14, p. 1, 
PI. 1, fig. 1—2. 
Pycnogommi littorale. Milne Edwards, Hist. Nat. des Cru- 
staces, Vol. Ill, p. 537, PI. 41, fig. 6. 
n _ „ Johnston, Mag. Zool. and Botany, Vol. I, 
p. 376, PI. XIII, figs. 1 — 3. 
Kroyer, Bidrag til Kundskab om Pycno- 
goniderne. Nat. Tidsskrift, ny Raikke, I, p. 126. 
„ „ Gaimard’s Voyage en Scandinavie, Crust. 
PL 38, fig. 4, a— e. 
Pycnogonum pelagicum, Stimpson, Invertebrata of Grand 
Manan, p. 37. 
Pycnogonum littorale, Jarzynsky, Pnemissus catalogus Pyc- 
nogonidarum inventarum in mare glaciale ad oras Lap- 
ponim, Rossicm et in mari albo. 
n Moebius, Jahresb. der Commission zur 
Unters. der deutschen Meere, I. p. 153. 
5 n Hoek, Ueber Pycnogoniden. Niederl. 
"Archiv f. Zool., Bd. ill, p. 236, Tab. XV, figs. 1—3. 
AVilson, Synopsis of the Pycnogonida of 
New England (Transact. Conn. Acad, of Arts and 
Sciences, Vol. V), p. 4. 
n „ Idem, Report on the Pycnogonida of New 
England and adjacent waters. United States Com- 
mission of Fish and Fisheries. Report for 1878, p. 
469, Pl. 1, figs. 1—3. 
Hoek, Report on the Pycnogonida of the 
Challenger Exped. Appendix I. Pycnogonida of the 
Cruise of the Knight Errant, p. 99. 
