KEPORT ON THE HOLOTHHRIOIDEA. 
229 
constantly with eight peripheral holes, and supporting a long slender spire of four 
rods, and usually three transverse beams ; top of the spire carrying teeth. The 
knobbed buttons, which have three to four holes, do not always seem to be present. 
Hcibitat . — Mediterranean Sea (von MarenzeUer, Heller, Grseffe, Ludwig). 
(Mus. Holm.) Three specimens from Lesina, kindly presented by von MarenzeUer. 
The dorsal appendages present a great resemblance to true pedicels. The 
ventral pedicels form three irregular longitudinal series. In the specimens at 
my disposal I found, among the more typicaUy formed tables, others which 
have a much larger and irregularly shaped disk, pierced with more holes and 
provided with a longer spire. Two of the individuals have scattered, complete 
or incomplete buttons, whUe the third is more richly provided with buttons, 
pierced with six or more holes, and bearing several irregularly placed knobs. 
Holothuria tubidosa, Gmelin, 1788 ; Tiedemann, 1816 ; Sars, 1857 ; Selenka, 1867 ; 
MarenzeUer, 1874. Mentula marina, Plancus, 1760. Die Zitterblase, 
Bohadsch, 1776. Fistularia tubidosa, Lamarck, 1816, Holothuria columnce, 
Delle Chiaje, 1823. Holothuria maxima, Delle Chiaje, 1823. Holothuria 
pentagnce, Delle Chiaje, 1823. 
Dorsal surface with large papillae ; ventral surface with pedicels. The small and 
scattered tables have the disks spinous on the margin, and the short spire ter- 
minating in about twelve teeth. The ventral perisome contains numerous thick 
swollen elHptic buttons, densely covered with spines, and mostly devoid of 
holes, but not unfrequently with from two to fourteen very minute ones ; there 
are also to be found buttons which are more sparingly provided with spines, or 
rather knobs, and smaller rounded bodies with uneven surfaces and two openings. 
In the dorsal perisome the buttons are densely knobbed and provided with 
larger holes. 
Hahitat . — Mediterranean Sea (Grube, Heller, Grseffe, Sars, von MarenzeUer, Selenka, 
Ludwig, &c.), south-west coast of France (Fischer), Portinho (Greeff), Canary 
Islands (Greeff). 
(Mus. Holm.) Several specimens from Naples, Salerno, Bay of Muggio, and Lesina. 
The species is easily known by its deposits. A part of the dorsal papillae run 
out from rather prominent wart-like elevations ; this, however, is not equally 
distinct in all specimens. The supporting plates of the pedicels are never smooth, 
as is the case in the following species. 
Holothuria stellati, Delle Chiaje, 1823 ; Semper, 1868 ; von MarenzeUer, 1874. 
Sporadipus (jlaber, Grube, 1840. Holothuria tubidosa, var. stellati, Lamarck, 
1840. Sporadipius stellati, Delle Chiaje, 1841. Holothuria glabra, Grube, 
1864. 
Dorsal surface with small papillse ; ventral surface with pedicels. Deposits like those 
of the preceding species, excepting that the spinous elliptical buttons are absent. 
