﻿I'YCXOGONIDA. -Q 



4. Colossendeis angusta (x. O. vSars. 



Colossendeis angusta Sars, Prodr. Crust. P\cuog., 1877, p. 368 n 8. 



— — Wilson, Report P\cnog-. Blake>, 1881, 15.243. PI. III. Fig. 8 og 13. 



— — Hoek, Pycnog. P'aroe Chann. Triton , 1884, p. 5. PI. i. Fig. 8. 



— — Hansen, Kara-Hav. Pycnog., 1886, p. 21. 



— — Sars, Pycnogonidea, 1891, p. 140. PI. X\'. P'ig. 2, 2 a-f. 



Xec! Colossendeis gracilis Hoek, Report Pycnog. Challenger , 1881, p.6q. PI. IX. Fig. 6 — 8. Pl.X. Fig.6 — 7. 

 — — — Schimkewitsch, Conipte-rendu Pantop. Albatross:, 1893. p. 32. 



I am decidedly of the opinion that the Col. gracilis of Hoek and the present species are 

 different, e\'en if by the mutual ratio of the last joints of the palps and by the specialh- long 

 claws of the ambulatory legs they form a particular generic group. It is upon the whole only 

 in the imago, or a far advanced stage of the development that the last joint but two of the palps 

 assumes its peculiar shape, while in the \'ery young lar\'a the same joint, cp. fig. 22, does not deviate 

 as to shape and position., but only as to length from the rule. 



The chelifori found by Hoek in a couple of specimens of Col. aiigitsfa and grncilis, and by 

 him mentioned as something cpiite strange or abnormal, I ha\-e found in upwards of a score of 

 grown young ones |of a length of 13 — 14""") of Col. aiigiisla, fig. 21, so that I should even be inclined 

 to suppose that the }Oung one as a rule keeps these lar\'al limbs, until they are thrown off at the 

 last moulting, cp. fig. 21. Also in a much younger larva (6'"™ long) I ha\'e found chelifori of 

 about the length of the proboscis, and with the scape divided into two distinct joints as in the full- 

 grown larva. The fact of the scape being two-jointed seems to me to be of importance witli regard 

 to the characterization and systematic position of the family, and therefore I have also pointed out 

 this feature in the famih-diagnosis. Cp. also the essays by Hoek cited here. 



Occurrence. The Ingolf-stations are 2, 3, 4, 64, 70, 103, 104, 105, 106, no, 113, 117, 120, 125, 

 138, 140, 141. From the great number of stations it will be seen that this species not only without 

 comparison has been the Colossfiidris most frequenth' found, but also that in this respect it is inferior 

 to no other Pycnogonid. It is especialh' in the southern part of the Norwegian vSea near the I~ar6e 

 Islands, just at the boundary of the Atlantic that it has been found; it has, howe\'er, also been taken 

 farther north in the same seas towards Jan ]vla}-en, and one single specimen has been taken .some 

 way up in the Greenland Sea, stat. 125, 68 08' Lat. N. 16- 02' Long. W. .\ few stations are also 

 found in the Atlantic south of Iceland, stat. 64, 62' 06' Lat. N. 19 txj' Long. W. with a depth of 

 1041 fath. The dejjths were otherwise ^■arying between 134 and 1309 fath., most frequently some 

 7—800 fath. 



Distribution. From the Kara Sea (Hansen) and X. \V. of Beeren Eiland |Sars| it is 

 spread especially to the .south in the Norwegian Sea and the Faroe-Shetland Channel |Hoek|, and 

 from there .sparsely round the southern coast of Iceland to the eastern coast of North .Xnierica 

 (Wilson I. 



S' 



