EEPORT OlSr THE HOLOTHURIOIDEA. 
135 
Herdman, &e.), west coast of France (Barrois), Mediterranean Sea (Ludwig, Grteffe, 
von Marenzeller, Sars, &c.). 
(Mus. Holm.) ISTumerous specimens dredged at tlie west coast of Sweden. Body 
fusiform, inconsiderably curved. Pedicels tightly placed all over the body- 
Calcareous ring large ; in an individual, 60 mm. long, its length was 20 mm. 
and breadth 9 mm.; the slender bifurcated prolongations of the radial pieces 
were 8 mm. long. In some specimens the ten pieces are obviously simple, in 
others they appear to be composed of several smaller parts, which, however, 
are not very distinct. Anal teeth more or less minute. 
Th.yone villosa, Semper, 1868. 
Habitat. — Zebu (Semper). 
This species must be nearly related to the former, and, in reality, I cannot find out any 
definite distinctions. The pedicels may possibly be finer and more closely placed 
in Thyonc villosa. Semper does not give any description of the deposits, but 
only a figure, which, however, cannot be fully satisfactory for communicating 
an idea of their true shape ; judging from this figure, I am much inclined to 
consider the deposits of this species as nearly hke those in the preceding. Thyone 
vemista of Selenka also bears the closest resemblance to Thyone fusus, only 
differing from it in the want of deposits. 
Thyone scabra, Yerrill, 1873. (?) Thyone fusus, Verrill, 1873. 
Deposits — tables composed of an oval, or triangular, or eubpolygonal disk with twenty 
to twenty-four holes, and a spire built up of two anastomosing rods. 
Hahitat. — Coast of Hew England (Verrill). 
Verrill does not mention anything about anal teeth or calcareous ring, he only 
declares that the species in question resembles Thyone rayhanus in form. It may 
possibly be devoid of anal teeth (?). 
3. Deposits in the shape of perforated plates. 
Thyone raphanus, Diiben and Koren, 1844 ; Hodge, 1872 ; von Marenzeller, 1878. 
The plates are rather large, closely crowded and overlapping. Very seldom minute 
X -shaped deposits may be found. Body curved with a long slender caudal portion. 
Habitat. — Scandinavian west coast northwards to Molde and Christiansund (Diiben 
and Koren, Storm, Sars, Danielssen and Koren), British Islands (Norman, 
Hodge, Kinahan, Th(iel, Herdman, &c.), Mediterranean Sea (von Marenzeller, 
Marion, Ludwig). 
(Mus. Holm.) A few specimens dredged off the west coast of Sweden. 
“ Porcupine ” Exp>edition. — Some large specimens from the Minch. 
