REPORT OX THE HOLOTHURIOIDEA. 
49 
Anhyrodenna roretzii [Haplodactyla), ron Marenzeller, 1878 and 1881. 
Deposits of four kinds — stars Like those in the preceding species, but no anchors are 
observed ; perforated, more or less irregular, round cups, each with a very long 
process, which either is soKd and simple, or provided with holes, and as it were 
composed of three rods ; a layer of brown, round or elliptic bodies of concentric 
structure ; these brown bodies are wanting at the tail, where they are supplied 
with crowded tables consisting of a fusiform or rounded perforated disk, and a 
tripartite spire terminating in several spines. 
Habitat. — Japan (von Marenzeller). 
Though no anchors have been observed, such deposits may, nevertheless, be found, and 
I cannot avoid thinking that the “ cups ” with the long process, according to 
von Marenzeller always broken off, represent simply the basal parts of the 
anchors, lily own researches mto the Challenger material seem to confirm this 
supposition. I cannot fully understand the descriptions of Danielssen and 
Koren, according to which that part of the anchor-stocks, which is in com- 
munication with the star-like deposits, is “ furnished with linear apophyses, five 
to six in number, according as the stellate figure consists of five or six calcareous 
rods.” This species is very nearly related to Ankyroderma jeffreysii and may 
possibly be only a vaiiety pf it. 
CLeniis 2. Eupyrgus, Llitken, 1857. 
Retractor muscles absent. Calcareous ring without posterior prolongations. 
Tentacles fifteen, simple, unbrancliecl. Body-wall very rough. Deposits — 
crowded tables consisting of a large irregularly rounded or triangular disk with 
undulated margin, and perforated with numerous, twenty or more, round holes ; 
the spire is long conical, built up of three rods, running together so as to form a 
conical finely spinous top, and several (not exceeding four) transverse beams. 
Eupyrgus scaher, Llitken, 1857 ; Semper, 18G8. Ecldnosoma hispidum, Semper, 1868. 
Habitat. — Arctic Sea, north of Norway (Danielssen and Koren), Nova Zembla and 
Kara Sea (Stuxberg), Barents Sea (D’Urban), Spitzbergen (Ljungman, Danielssen 
and Koren), Greenland (Llitken, Ludwig, &c.). 
CMus. Holm.) A great number of individuals from Greenland and Spitzbergen. 
Some of the radial pieces of the calcareous ring seem to have a very indistinct 
and ground bifurcation posteriorly. 
Geuus 3. Haplodactyla, Grube, 1840. 
Retractor muscles absent or rudimentary. Calcareous ring with five bipartite 
posterior prolongations. Tentacles fifteen to sixteen, simple nnbranched. 
Body-wall not rough. Deposits of simple structure, never in the shape of tables. 
(ZOOL. CHALL. EXP. — PART XXXIX. — 1885 .) Qd ^ 
