24 
THE VOYAGE OF H.M.S. CHALLENGER. 
IV. Tentacles thirteen. 
Synapta indivisa, Semper, 1868. 
Tentacles with about twenty very long, slender digits. Cartilaginous ring absent (?). 
Three Polian vesicles. A single madreporic canal. Anchor-arms smooth. 
Anchor-plates with six larger dentate holes, and three larger and some smaller 
smooth holes. Miliary granules rosette-shaped. 
Halitat. — Samboangan, Mindanao (Semper). 
Synapta recta, Semper, 1868. 
Tentacles with very short digits. Cartilaginous ring present, with holes posteriorly. 
Nine long and three or four shorter Polian vesicles. A single madreporic canal. 
Deposits like those in the preceding species. Especially distinguished by the 
intestine not forming convolutions. 
Habitat . — Bohol (Semper). 
V. Tentacles twelve. 
Synapta inhcerens {Holothuria), 0. F. Muller, 1788 ; Eathke, 1843 ; Diiben and Keren, 
1844 ; J, Muller, 1850. Fentacta inhcerens, Cucumaria 
inhcerens, Blainville, 1834. Dactylota inhcerens, Brandt, 1835. Chirodota 
pinnata, Glrube, 1840. Synapta duverncea, Quatrefages, 1842. Synapta 
henslowana. Gray, 1848. Synapta girardii,VowxtdXhs,, 1851. Synapta tenuis, 
Ayres, 1854. >S)/nap^a Stimpson and Kiirtz, Ayres, 1854. Synapta 
galliennii, Herapath, 1865. Synapta ayresii, Selenka, 1867. Leptosynapta 
tenuis, Verrill, 1867-1871. Synapta saruiensis,^d^j Lankester, 1868. Lepto- 
synapta inhcerens, Verrill, 1867-1871. Leptosynapta girardii, Verrill, 1874. 
Tentacles with eleven to fifteen digits. Cartilaginous ring none. One to three Polian 
vesicles. A single madreporic canal. Anchor-arms dentate. Anchor-plates 
ovate, narrower towards the attachment to the anchor, but without any true 
narrow handle, with seven larger dentate holes and several larger and smaller 
smooth holes at the narrower end. Miliary granules present. 
Habitat . — Scandinavian coasts from the Sound to Finmark (Dtiben and Koren, 
Danielsen, M. Sars, Eathke, Mobius, Ludwig, 0. F. Muller, Danielsen and Koren), 
White Sea (Jarzynsky), British Islands (Woodward and Barret, Eay Lankester, 
Kinahan, Brady and Eobertson, Thompson, MTntosh, Norman, Herapath, Mobius 
and Biitschli, Herdman, Leslie and Herdman, &c.). North Atlantic Ocean between 
Scotland and Norway (Mobius and Biitschli), West coast of France (Quatrefages, 
Fischer, Barrois), Mediterranean Sea (J. Muller, Ludwig, &c.). New Jersey to 
Massachusetts Bay (Verrill, PourtaEs), Boston Harbour, Bird Island, Sag Harbour, 
South Carolina (Ayres). N. Carolina (Coues and Yarrow). 
