ECHINODEBMATA. 121 



of 20-5 millim. and is 12 millim; high ; the abactinal area is 4-5 and 

 the anal area is 2 millim. in diameter. The short primary spines, 

 which, as in the other specimens, have two or three short bands of 

 bright red on their white surface, have the neighbouring suckers of 

 a purplish-slate colour, and these give a deeper and richer appear- 

 ance than ordinary to the test. The abactinal area is not so con- 

 spicuous as in the smaller specimens, and only one of the genital 

 plates has more than three tubercles. 



Thursday Island ; Prince of Wales Channel. 



9. Echinus angulosus. 

 A. Agassiz, Eev. Ech. p. 489. 



With a little hesitation I refer to this species three specimens from 

 Thursday Island, and one from Prince of Wales Channel. The 

 species is a wide-ranging one, and apparently presents a good deal 

 of variation. 



10. Echinus daraleyensis. 



J. E. Tenison- Woods, Proc. Linn. Sac. JVi S. W. ii. p. 165. 



In accepting this species, I should like to do so only provisionally, 

 as a systematic revigion of the exceedingly troublesome genus to 

 which it belongs may show it to be only part of one of the very 

 variable species which are associated under the emended genus 

 Echinus. 



Thursday Island (4 fms.) and Prince of Wales Channel. 



11. Tripneustes angulosus. 



Hipponoe variegata, A. Agassiz, Rev. Ech. p. 501. 

 Tripneustes angulosus, Bell, P. Z. 8. 1879, p. 657. 



The coloration of this specimen is more marked than any I have 

 yet had the opportunity of examining ; the short white spines are 

 found either on white areas, the middle of which is occupied by a 

 black patch, or on broad black bands, rather more than half as wide 

 as the white areas at the ambitus. 



The single small specimen collected was found at Levuka, Fiji. 



12. Strongylocentrotus erythrogrammus, Vol. 

 Strongylocentrotus eurythrogrammus, A. Agassiz, Rev. Ech. p. 441. 



It may perhaps be pointed out that the spelling of the specific 

 name as here adopted is not only that which is etymologically 

 correct, but is the very same as that which was proposed by Valen- 

 ciennes (' Voy. Venus,' Zoophyt. pi. vii. fig. 1), and adopted by 

 Liitken and VerriU ; it is true that in the ' Catal. Eaisonne ' of L. 

 Agassiz and Desor (1846) we find the speUing eurythrogrammus, 



