REPORT ON THE HOLOTHHRIOIDEA. 
199 
fonning a kind of sole ; in the space between the anus and the truncated end 
of the sole there are papillae instead of pedicels. The dorsal papillae, not so 
closely placed as the pedicels, are situated, apparently, on low wart-like 
bases. A single Pohan vesicle and madreporic canal. Numerous Cuvierian 
tubes. The dorsal papillae have curved spinous rods and larger irregularly 
rounded or oval, bilateral plates, while the pedicels are devoid of rods. 
Miilleria excellens, Lud-^dg, 1875. 
Deposits — tables and buttons. The short spire terminates in a rounded top with 
innumerable minute teeth ; the oval buttons have six to eight holes and are 
finely spinose, especially round the margin. 
Habitat . — Navigator Islands (Ludwig). 
Miilleria parvula, Selenka, 1867. Actinopyga parvula, Verrill, 1867 to 1871. 
Deposits — tables and buttons, the former with the truncated apex terminating in 
numerous teeth, the latter smooth and pierced with about six holes. Colour 
uniformly auburn. 
Habitat . — Florida (Selenka). 
As will be understood from the above descriptions, Miilleria parvula is distinguished 
from Miilleria jlavo-castanea by the colour, by the number of holes in the 
buttons, by the absence of Cuvierian organs, &c. Notwithstanding this, further 
investigations may possibly show the former to be the young of the latter. 
Miilleria excellent differs from Miilleria parvula mainly in the rounded, very 
spinous apex of the tables as well as by the spinous buttons. Among the 
collections of Holothurians in the Zoological State Museiun at Stockholm a 
small Miilleria, .30 mm. long, is preserved from the Navigator Islands. At first 
one may be inclined to refer it to Miilleria excellens, which lives at the same 
locality, but it is distinguished by the smooth buttons and in having a great 
part of the tables, like those in Miilleria parvula, provided with fewer spines in the 
truncated end of the spire, the rest of the tables bearing a nearer resemblance 
to those in Miilleria excellens. Either the two species of Miilleria are not distinct, 
or Miilleria parvula lives both in the Pacific and Atlantic Oceans — or the 
above-mentioned form is new to science, which seems less probable. 
2. Deposits — comparatively large x -shaped, slender, branched spicules, with 
the straight arms slightly dichotomous. 
Mulleria formosa, Selenka, 1867. 
The very slender x -shaped bodies have the arms rather straight, narrow, tapered and 
often provided with a few spines, and aggregations of minute roundish 
grains. Ventral pedicels very numerous ; dorsal papdlte on crowded warts. 
Macassar (Selenka), Mauritius (Haacke). 
