56 PYCNOGONIDA. 
The trunk rather slender, the posterior edge of the rings produced into a pointed tooth. 
The neck rather short. 
The proboscis thick, distinctly constricted. 
The oculiferous tubercle large, the apex produced into an angle, the side-teeth sharp. 
The caudal segment slender, perpendicularly erect. 
The chelifori short; the fingers mostly rudimentary, sometimes long, slender. 
The palps somewhat long. Sensory distinct. 
The ovigerous legs somewhat long; the dermal leaves of the terminal part with 6 strong teeth at 
the base. 
The ambulatory legs somewhat short, rough, densely hairy, the first tarsal joint three times shorter 
than the second one, the comb of the second joint less small-toothed, only the fourth joint of 
the three hindmost pairs of legs with a tubercle. 
Total length (with the proboscis produced) 1or=, The proboscis 47m, The trunk 57, The caudal 
segment vore 
This species is very much like Åscorhynchus abyssi of Sars «Pycnogonidea, 1891, p. 133, pl. XIV, 
fig. 2, 2 a-t, and I was long doubtful whether I should set it up as a particular species. Among the 
characters of the diagnosis I may especially point to the shape of the oculiferous tubercle, having 
always found its dorsal side produced in the middle to an acute angle with sharp teeth on the sides. 
The neck is also much shorter, the point of the rings of the trunk is drawn back quite to the 
posterior edge, the caudal segment is horizontal, not directed downward, and the armament of the 
inner edge of the second tarsal joint is much more spread than in AÅscorhynchus abyssi. I have also 
pointed out that the sensory in the palps is distinctly discernible, and that only the three hindmost 
pairs of ambulatory legs have the tubercle on the fourth joint, already represented by Sars; but it is 
possible or probable that these two characters may be found also in AÅscorhynchus abyssi. Finally 
the ratio of length between the joints of the palps is not a little different from that in the species 
of Sars. The differing structure of the chela and its fingers is scarcely to be regarded as a specific 
character. 
Occurrence. The Ingolf-stations 112, 113 and 124 are in the western part of the Norwegian 
Sea and in the southeastern part of the Greenland Sea. The two first places, on which it was taken 
in considerable numbers, were on 67? 57' Lat. N. 6? 44' Long. W., and 69” 31' Lat. N. 77 06' Long. W., the 
depths were 1267 and 1309 fath., and the bottom was on both places Biloculina clay with tempe- 
ratures of — 11 and — 1%. On the third place, 67? 40! Lat. N. 15? 40' Long. W. the depth was only 
495 fath., the bottom brownish gray, or blue mud or clay (not Biloculina clay) with short, cylindrical, 
araneous foraminifera, and with a temperature of — 0,6”. 
IL. Fam. Colossendeidæ. 
Corpus solidum. 
Rostrum validum, inflexibile, libratum vel nutans. 
Sesam 
