gonidea (Pantopoda) beskrives imidlertid 2 Arter, P. nodo- 

 sum og P. pusillum, der begge er vel adskilte fra den ty- 

 piske Art. Hertil kommer eiulnu en ny nordisk Art, 

 P. crassirostre, som i det folgende nærmere skal beskrives. 

 Arterne af denne Slægt er let kjendelige ved deres ualmin- 

 delig undersætsige Kropsform, korte og kraftige Gangfød- 

 der, de ualmindelig haarde og knudrede Integuinenter og 

 den enkle, kageformige ydre Ægmasse. De synes delvis 

 at føre et halvt parasitiskt Liv, idet de ofte er fundne fast- 

 klamrede til Actinier og andre lavere Sødyr. 



I. Pycnogonum littorale (Strøm). 



(Pl. I. fig. 1. il— i). 



Fhalhtngium Utforede. Strøm, Physisk og oeconomisk Be- 

 skrivelse over Fogderiet Sondmor, p. 209, Tab. I, 

 tig. 17. 

 Pycnogonum balænarum, Linné, Syst. Nat. ed. XII, I, p. 



1028. 

 Pycnogonum littorale, 0. Fabr. Fauna Gronlandica, p. 233. 

 O. F. Maller, Zool. Dan. III, p. 68, 

 Tab. CXIX, fig. 10—12. 

 Pycnogonum balænarum, Latreille, Hist. nat. des Crustacés 

 et des lnsectes, Tome VII, p. 332. 



Goodsir, Ann. Nat. Hist. Vol. 14, p. 1, 

 Pl. 1. fig. 1—2. 

 Pycnogonum littorale, Milne Edwards, Hist. nat. des Cru- 

 tacés, Vol. III, p. 537, Pl. 41, tig. 6. 

 „ .. Johnston, Mag. Zool. and Botany, Vol. 1, 



p. 376. Pl. XIII, figs. 1—3. 



„ .. Krøyer, Bidrag til Kundskab om Pycno- 



goniderne. Nat. Tidsskrift, ny Række, 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, Præmissus catalogus Pyc- 

 nogonidarum inventaruni in mari glaeiali ad oras Lap- 

 poniæ Rossicæ et in mari albo. 



„ Moebius. Jaresb. der Commission zur 



t liters, der Deutschen Meere, I, p. 153. 



„ Hoek, Ueber Pycnogoniden. Niederl. Ar- 



chiv f. Zool, Bd. III, p. 236, Tab. XV. fig. 1—3. 



Wilson, Synopsis of the Pycnogonida of 

 Ni '\v England. (Transact. Conn. Acad. of Arts & 

 Sciences, Vol. V) p. 4. 



Idem, Report on the Pycnogonida of New 

 England and adjacent waters. United States Corn 

 mission of Fish and Fisheries. Report f. 1878, p. 469, 

 Pl. 1. tig. 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 /'. pusillum, botli 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 

 fonn of body, short and powerfu] 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). 



(Pl. I. Hg. 1. a— i). 



Phallanginm littorale, Strom. Physisk og oeconomisk Beskri- 

 velse over Fogderiet Sondmor. p. 2<>9, Tab. 1, fig. 17. 



Pycnogonum balænarum, Linné. Syst. Nat. ed. XII, I, p. 



1028. 

 Pycnogonum littorale, O. Fabr. Fauna Gronlandica, p. 233. 

 0. F. Muller. Zool. Dan. III. p. 68, 

 Tab. CXIX, figs. 10—12. 

 Pycnogonum balænarum. Latreille, Hist. nat. des Crustacés 

 et des lnsectes, Tome VII, p. 332. 

 „ ., Goodsir, Ann. Nat. Hist. Vol. 14, p. 1, 



Pl. 1, fig. 1—2. 

 Pycnogonum littorale. Milne Edwards, Hist. Nat. des Cru- 

 stacés. Vol. III. p. 537, Pl. 41, fig. 6. 

 ,, .. Johnston, Mag. Zool. and Botany, Vol. I, 



p. 376, Pl. XIII, figs. 1—3. 



Krøyer, Bidrag til Kundskab om Pycno- 

 goniderne. Nat. Tidsskrift, ny Række, I, p. 126. 

 „ „ Gaimard's Voyage en Scandinavie, Crust. 



Pl. 38, fig. 4, a-e. 

 Pycnogonum pdagicum, Stimpson, Invertebrata of Grand 



Manan, p. 37. 

 Pycnogonum Utforede, Jarzynsky, Præmissus catalogus Pyc- 

 nogonidaruiu inventaruni in mare glaciale ad oras Lap- 

 poniæ, Rossicæ et in mari albo. 



„ „ Moebius, Jahresb. der Commission zur 



Unters. der deutschen Meere, I. p. 153. 

 „ .. Hoek, Ueber Pycnogoniden. Niederl. 



Archiv f. Zool.. Bd. III, p. 236, Tab. XV, figs. 1—3. 

 Wilson, Synopsis of the Pycnogonida of 

 New England (Transact. -Conn. Acad. of Arts and 

 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 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. 



