﻿PYCNOGONIDA. 

 40 



The ovigerous legs rather long; the claw with man>- teeth. 



The ambulatory legs short, rather thick; the tarsal joints of abont equal length, together not so long 

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

 claw short, somewhat thick, with rather slender auxiliary claws, scarce!}' half as long as the 

 claw itself. 



Total length S""". The proboscis 2,8'"'". The trunk 5,3'"™. The caudal segment i'"">. 



This species is very nnicli like the preceding one, but belongs, by the structure of its palps, 

 to another specific group. Onl\- a couple of not full-grown specimens have been taken. 



Occurrence. The Ingolf-station 95, in the middle of the Denmark Strait, 65° 14 Lat. N. 

 30° 39' Long W. ; depth 752 fath., bottom temperature 2",i. 



8. Nymphon Stroemii Kr. 



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



— — Idem, (laimard, Voy. Scand. Lappon., 1849, l''- 35- ^^S- 3' ^-^- 



— — Wilson. vSyn. Pycnog. Xew-Engl., 1878, p. 17. PI. \T. Fig. i, a-h. 



— — Hansen, Kara-Hav. Pycnog., 1886, p. 9. Tab. X\'III. Fig. 3. 



— — Sars, Pycnogonidea, 1891, p. 80. PI. VIII. F'ig. 2, 2 a-k. p. p. 

 Nymphon gracilipes Heller, Crust. Pycnog. Tunic, 1875, p. 40. Taf. IV. Fig. 15. Taf. V. Fig. 1-2. 



— — Sars, Pycnogonidea, 1891, p. 83. PI. VIII. Fig. 3, 3 a-g. p. p. 



As Wilson and Hansen I also must acknowledge that I cannot keep distinct A\ Stroemii 

 and N. gracilipes; for even if it may frequenth' be easy enough decidedly to refer a specimen to one 

 or 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. 



Occurrence. The Ingolf-stations are: 2, 3, 4, 29, 32, 35, 44, 87, and 106. The number of 

 stations shows to be sure that this species has lieen taken ver\- frequenth-, but outside of the south- 

 most part of the Norwegian Sea, and a little wa\- into the Atlantic, as also in the western part of 

 the Davis Strait, it has only been taken once b}' the Ingolf in the Denmark Strait, at the mouth of 

 Bredebugt on Iceland. The depths were from 68 — 545 fath. 



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

 Strait, 63'' 56' Lat. N. 52" 12' Long. W., 130 fath. (Wandel); 65= 27' Lat. N. 54"^ 45' Long. W. (idem); 65-35' 

 Lat. N. 54° 50' Long. W., 80 fath. ( Fylla 1SS4); the Denmark Strait, 65° 39' Lat N. 28" 25' Long. W. , 553 

 fath. («Fylla > 1888); the Greenland Sea, 69" 25' Lat. N. 20 i' Long. W. 167 fath. (Bay); the west coast of 

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

 (Joh. Petersen) ; the Skager Rack, the Skaw in S. S. E. 34 miles, 210 fath. (idem); the Cattegat (idem). 



Distribution. Sars gives a different sphere of distribution for his two .species, A^. Stroemii 

 and A', gracilipes^ a more southern one for the fonner, lesser fonn, and a more northern one for the 

 latter, somewhat larger species. The limit as to the independence of the species that might be found 

 in this circumstance, loses to me much of its importance, when I find forms c^uite corresponding to 



