PY( DA 



w with many teeth. 

 ■ lit, rather thick; the tarsal joints of about equal length, together not so long 

 half the second tibial joint; the second tarsal joint without thorns in the inner edge The 

 Mnwh.it thick, with rather slender auxiliary claws, scarcely half as long as the 



.1 length • Th( ■ The trunk >;,"""• The caudal segment i 



This very much like the preceding one, but belongs, by the structure of its palps, 



mother specific group. Only a couple of not full-grown specimens have been taken. 



urrence. The Ingolf-station 95, in the middle of the Denmark Strait, 6 Lat N. 



Long \\\; depth 752 fath., bottom temperature 2 ,1. 



8. Nymphon Stroemii Kr. 



Nymphon Stroemii Kroyer, Kundsk. Pycnog, 1844, p. in. 



Idem, Gaimard, Voy. Scand. Lappon., i s i<). PL 35. Fig. 3, a-f. 

 Wilson. Syn. Pycnog. New-EngL, 1878, p. 17. PL VI. Fig. 1, a-h. 

 Hansen, Kara-Hav. Pycnog., 1886, p.9. Tab. XVIII. Fig. 3. 

 Sars, Pycnogonidea, [891, p. 80. PL VIII. Fig. 2,2a-k. p.p. 

 Nymphon gracilipes Heller, Crust Pycnog. Tunic, 1875, l'-4°- Ta£ IV. Fig. 15. Taf. V. Fig. 1-2. 

 Sars, Pycnogonidea, [891, p.83. PL VIII. Fig. 3, 3a-g. p.p. 



As Wilson and Hansen I also must acknowledge that I cannot keep distinct .V. Stroemii 

 and .V. gracilipes\ for even if it may frequently be easy enough decidedly to refer a specimen to one 

 the other of the two forms, the decision is still oftener very difficult or quite impossible, or we 

 find an intermingling of the separating characteristics. 



urrence. The fngolf-stations are: 2, 3, 4, 29, 32, 35, |(, 87, and ro6. The number of 



stations shows to 1>e sure that this species has been taken very frequently, but outside of the south- 



' the Norwegian Sea, and a little way into the Atlantic, as also in the western part of 



the Strait, it has only been taken once by the tngolf in the Denmark Strait, at the mouth ol 



1 on Iceland. The depths were from 68 545 fath. 



::i the collections of the Zoological Museum I may add the following localities: the Davis 



6'LatN. 52 [2'Long.W., [30 fath. (Wandel); 65 27' Lat N. 54 ^' Long. W. (idem) ; 65 35' 



. 'Ug.W., 80 fath. I Fylla [884); the Denmark Strait, 65 39' I.at. X. 28 25'Long.W., 553 



Greenland S ;s' I.at. X. 20 1' Long. W. [67 fath. (Bay); the west coast of 



.1 specimen of Kroyer); the Skager Rack, close to the Norwegian coast. 275 fath. 



in; the : k, the Skaw in S. S. E. 34 miles, 210 fath. (idem); the Cattegat (idem). 



tribution. Sars gr nt sphere of distribution for his two species. A'. Stroemii 



OUthern one for the former, lesser form, and a more northern one for the 



latt .vhat la: The limit as to the independence ol the species that might be found 



in I to me much of its importance, when I find forms quite corresponding to 



