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Show 1888.] FROM TUTICORIN, MADRAS. 387 Prof. Alex. Agassiz based his description. I give the more important measurements of the larger of the two specimens, from which it will be seen that the proportions are very similar to those of the type: - millim. Longest diameter 38"5 Greatest breadth 33 Height 21 Distance of apical system from anterior edge .... 21 Length of anterior petals 15 Length of posterior petals 16 Width of interporiferous space 4 Width of actinostome 9*5 HAPLODACTYLA AUSTRALIS. I think that Prof. Ludwig (SB. Ak. Berl. 1887, p. 1218) is right in regarding H. andamanensis, Bell, as a synonym of Semper's species ; but I may point out that the figure of the spicules given by Selenka differs somewhat from the representation drawn by Prof. Ludwig ; the resemblance between the latter and my figures of the spicules of H. andamanensis is very close. HOLOTHURIA VAGABUNDA. With regard to this species I have to observe that, noting in one the great muscularity of the walls of the cloaca, I concluded it must have extensible Cuvierian organs; I therefore opened another specimen, and found the cavity of the cloaca occupied by a mass of tubes, just as I figured it in the case of H. nigra (P. Z. S. 1884, p. 374) ; the third specimen had the tubes projecting from the vent, but still in organic connexion with the mass inside. In concluding this paper it may be convenient to give, in a summary form, an account of the present state of our knowledge of the Echinoderm-fauna of the Sea of Bengal, taking as southern boundaries Ceylon on the west, and the Nicobars on the east1. This is a region which has not been touched by any recent explorations, such as the ' Challenger,' ' Alert,' or ' Gazelle.' I. CRINOIDEA. 1. Antedon carinata, Leach. 2. adeonse, Lamk. 3. reynaudi, Mull. 4. palmata, Midi. 5. Actinometra cumingii, Midi. 6. fimbriata, Mull. 7. parvicirra, Mull. 1 In addition to the papers already cited, the list given by Dr. Liitken (Vid. Med. 1871, p. 272) has been used in the preparation of this summary. Information as to the Ophiurids collected by the ' Novara' at the Nicobars is to be found in Herr Marktanner-Turneretscher's paper in the ' Annalen des k. k. Naturh. Mus.' ii. p. 291 et seq. |
