KEPOET ON THE HOLOTHIJEIOIDEA. 
29 
HoMtat . — Banka at Sunda Islands (Ludwig). 
Considering that the tentacles are unknown, this species may possibly be referred to 
the group with five digits in each tentacle. 
h. Anchor-plates more or less iiTegularly rounded, without any 
marked handle, with uneven or incomplete margin and smooth 
rather numerous holes. 
Synapta biclentata, Woodward and Barrett, 1858. 
Anchor-arms smooth but bifid. Anchor-plates obovate, truncated at the articular end, 
and with numerous holes. klihary granules rather large, very numerous, 
resembling cruciform fragments of anchor-plates. Inner organs unknown. 
Habitat . — China (W. and B.). 
Synapta molesta, Semper, 1868. 
Anchors small, and as it were undeveloped. Anchor-arms smooth, not bifid. Anchor- 
plates very irregular, without bow. Miliary granules cruciform or resembling 
minute irregular plates pierced by a few holes. A single madreporic canal. 
Four long Polian vesicles. 
Habitat . — Bohol (Semper). 
III. Tentacles twelve, with five digits, the terminal one being more or less inconsiderable. 
Synapta digitata [Holothuria), Montagu, 1815 ; Muller, 1850 and 1852 ; Baur, 1864 ; 
Woodward and Barrett, 1858. Fistularia digitata, Lamarck, 1816. Holo- 
thuria inhcerens, Delle Chiaje, 182.3. Millleria digitata, Fleming, 1828. 
Thyone digitata, Blainville, 1834. Chirodota chiaii, Grube, 1840. 
Chirodota digitata, Forbes, 1841. Synapta digitata, var. ihompsoni, 
Herapath, 1865 ; Barrois, 1882. 
Anchors slightly unequal in size. Anchor-arms smooth or with some serrations. 
Anchor-plates slightly elongate, with a marked narrow handle, almost like that 
in Semper’s Synayta duhia, irregularly perforated and with the holes smooth. 
Miliary granules numerous, oblong or hour-glass shaped, especially crowded over 
the muscular bands. Madreporic canal and Polian vesicle single. 
Habitat . — British Islands (Montagu, Woodward and Barrett, Thompson, Kinahan, 
Forbes, &c.), France (Barrois, Fischer), Spain, at Vigo Bay (Woodward and 
Barrett), Mediterranean Sea (Ludwig, Sars, J. Muller, Grube, Heller, &c.). 
