Report on the zoological collections made in the Indo-Pacific Ocean ...

ECHINODEEMATA. 121of 20*5 millim. and is 12 millim. high ; the abactinal area is 4-5 andthe anal area is 2 millim. in diameter. The short primary spines,which, as in the other specimens, have two or three short bands ofbright red on their white surface, have the neighbouring suckers ofa purplish-slate colour, and these give a deeper and richer appearancethan ordinary to the test. The abactinal area is not so conspicuousas in the smaller specimens, and only one of the genitalplates has more than three tubercles.Thursday Island ; Prince of Wales Channel.A. Agassiz, Rev. Ech. p. 489.9. Echinus angulosus.With a little hesitation I refer to this species three specimens fromThursday Island, and one from Prince of Wales Channel. Thespecies is a wide-ranging one, and apparently presents a good dealof variation.10. Echinus darnleyensis.J. E. Tenison-WvodsjProc. Linn. Soc. N'. S. W. ii. p. 165.In accepting this species, I should like to do so only provisionally,as a systematic revision of the exceedingly troublesome genus towhich it belongs may show it to be only part of one of the veryvariable species which are associated under the emended genusEchinus.Thursday Island (4 fms.) and Prince of Wales Channel.11. Tripneustes angulosus.Hippouoe variegata, A. Ayassiz, Rev. Ech. p. 501.Tripneustes angulosus, BeU, P. Z. S. 1879, p. 657.The coloration of this specimen is more marked than any I haveyet had the opportunity of examining ; the short white sjjines arefound either on white areas, the middle of which is occupied by ablack patch, or on broad black bands, rather more than half as wideas the white areas at the ambitus.The single small specimen collected was found at Levuka, Fiji.12. Strongylccentrotus erythrogrammus, Vol.Strongylocentrotus eui-ythrogrammus, A. Agassiz, Rev. Ech. p. 441.It may perhaps be pointed out that the spelling of the specificname as here adopted is not only that which is etymologicallycorrect, but is the very same as that which was proposed by Valenciennes(' Voy. Venus,' Zoophyt. pi. vii. fig, 1), and adopted byLiitken and Verrill : it is true that in the ' Catal. Eaisonne ' of L.Agassiz and Desor (1846) we find the spelling euryihroyrammus.