264 THE ANTARCTIC MANUAL. 
Four species of the family Azcrorina# were dredged in the deep 
Antarctic sea. (ix.) Arcturus ylacialis, Bedd., taken at station 153 
close to the Antarctic ice-barrier, the southernmost point at which the 
Challenger took soundings. The depth was 1675 fathoms. It agrees 
with A. furcatus, A. spinosus, and .A. brunneus in the extraordinary 
development of spines upon the carapace and limbs. Only one 
specimen was taken, and only at the spot mentioned. (x.) A. furcatus, 
Stud. This species has long been known. It occurs in considerable 
numbers in the shallow waters around Kerguelen and off Heard 
Island, and it was dredged from 1675 fathoms at station 158, where 
the bottom is of blue mud. Its occurrence both in deep and shallow 
water is “most unusual,” and worthy of note. (xi.) A. spinosus, 
Bedd. Eight females and three males were taken at a depth of 
1375 fathoms at station 146. (xii.) A. brunneus, Bedd., of a dark 
brown, almost black colour. Taken at station 147; two males and 
two females ; a small species, the largest measuring 19 mm. 
A special monograph was devoted to the members of the genus 
Serolis collected by the Challenger. The following species were 
taken from the depths in our area:—(xiil.) Serolis antarctica, Bedd. 
This species is blind. It was taken at two stations, 146 and 147, 
and again in S. latitude 9°10’. (xiv.) S. dromleyana, Suhm, is the 
giant of the genus, reaching a length in the male of 54 mm. It 
seems to be a variable species. Specimens were taken at station 156 
at 1975 fathoms, from a bottom of Diatom ooze, and from three other 
stations further north. Many other species of Serolis were collected 
from these waters, but they were not deep-sea forms, and were seldom 
found deeper than 100 fathoms. 
PYCNOGONIDA. 
The group Pycnogonida, or, as some prefer to call it, Pantopoda, 
contains some deep-sea species, but there are no genera of which it 
can be said they are true deep-sea forms. “As a rule,” says Hoek, 
“the deep-sea species are slender, the legs very long and brittle, and 
the surface of the body smooth.” The following species were dredged 
in the sub-Antarctic seas :—(i.) Nymphon hamatum, Hoek, taken off 
the Crozets, at stations 146 and 147. It is a fine and beautiful 
species. (il.) WV. meridionale, Hoek. A single specimen of this, the 
most southerly Pycnogonid described, was taken at station 153. 
Hoek remarks on the presence of normal eyes in this deep-sea crea- 
ture. Several other species of Vymphon were taken in and around 
Kerguelen, but at no great depths. (iii.) Ascorhynchus glaber, Hoek, 
