REPOET ON THE PYCNOGONIDA. 97 



with hairs. The Bide of the eighth joint facing the claw shows a I'ow of regular strong 

 spines. The genital pores of the males are smaller than those of the females ; they are 

 present only on the two posterior pairs of legs. 



As for the geographical distribution of this species, G. 0. Sars dredged it in lat. 62° 

 44' 5" N., long. 1° 48' E., in comparatively deep water (412 fathoms), in the cold area. 

 He found there only four specimens, whereas a single haul with the trawl in the Faroe 

 Channel yielded among a thousand specimens of Nymphon rohusttim, Bell, upwards of 

 thirty specimens of the species in question. This occurred at 



Station No. 8 (cruise of the "Knight Errant"). Lat. 60° 3' N., long. 5° 51' W. 

 August 17, 1880. 540 fathoms. Cold area. 



This station is not very far from the place where it was dredged by Professor G. 

 0. Sars, and as this is the only instance, so far as I know, of this species having been 

 collected previous to the cruise of the " Knight Errant," most probably it has a very 

 restricted distribution. 



Nymphon robustum, Bell. 



NympJion rohustum, Bell, Belcher's Last of the Arctic Voyages, vol. ii. p. 409, 1855, Tab. 

 XXXV. fig. 4. 



Nymphon abyssurian, Norman, WyviUe Thomson, Depths of the Sea, p. 129, 1873. 



Nymphon hicms, Heller, Crustaceen, Pycnogoniden und Tunicaten der K. K. Oester. Ungar. 

 Nordpol Exped. Denkschriften der Wiener Akademie der Wiss., xxxv. 41, 1875. 



Nymphon rohustam, Bell, G. O. Sars, Prodromus Crustaceorum et Pycnogonidarum, Arch. fib- 

 Math., og Naturvid., ii. 265, 1877. 



An ample discussion of the s}Tionymy of this species, and a description of those 

 parts of the body which have hitherto been overlooked, I have given in my paper on the 

 Pycnogonids of the cruises of the " AVillem Barents," to which I have referred above. 

 An immense quantity of this true cold area species was dredged during the recent 

 cruise of the " Knight Errant." Mr Murray writes to me that this was the greatest 

 haul of Pycnogonids he ever observed. It is a blind species, and along with it were 

 trawled a considerable number of specimens of Nymphon macronyx which have distinct 

 eyes, about ten specimens of Nymphon stromii also furnished with eyes, one sj)ecimen of 

 Nymphon grossip>es with eyes, and four specimens of Colossendeis proboscidea, Sabine 

 (sp.), which is again without eyes. The number of specimens with eggs is not very 

 considerable, and there is not one which shows the numerous highly developed young 

 ones clinging to the ventral side of the body of their parent as is the case with some 

 specimens from Barents Sea. 



Finally, I wish to point out that the dimensions of the " Knight Errant " specimens are 

 considerably smaller than those of specimens from higher latitudes. As I have mentioned 

 a,bove, this is also the case with the specimens of Nymphon stromii. 



(ZOOL. CHALL. EXP. — PART X. — 1881.) K13 



