136 REPORT ON THE ECHINODERMS (OTHER THAN HOLOTHURIANs) 



it is certainly a Triplechinid ; the long solid spines, banded red and yellow, and the 

 purple sinuous lines that mark out the interambulaera produces an elegant effect, 

 which must be very marked during life. 



I can only call attention to the form, and hope for a series of larger specimens. As 

 it is suggested by the editor that it should have a name I propose to call it S. elegans. 



16. Echinometra lucunter. 



Echinus lucunter, Linn. Syst. Nat. x. (1758), p. 665. 



Echinometra lucunter, Liitken, Videns. Meddel. 1863 (1864), p. 86; Loven, Bih. Sv. 

 Vet. Akad. Hdlgr. xiii. (1887), iv. no. 5, p. 157. 



Loc. Cape Ventenat, Noimanby Island, New Guinea. 



17. Heterocentrotus trigonarius. 



Echinus trigonarius, Lamk. An. s. Vert. iii. (1816), p. 51. 



Heterocentrotus trigonarius, Brandt, Prodr. descr. Animal. (1835), p. 266 ; A. Ag. Rev. 

 Ech. (1872), p. 430. 



Loc. Loyalty Islands. 



18. Arachnoides placenta. 



Echinus placenta, Linn. Syst. Nat. x. (1758), p. 666. 



Arachnoides placenta, Agass. Mon. Scutell. (1841), p. 94; Loven, Bih. Svensk. Vet 

 Akad. Hdlgr. xiii. iv. (1884), no. 5, p. 178. 

 Loc. New Britain. 



ASTEROIDEA. 



19. Astropecten monacanthus. 



Astropecten monacanthus, Sladen, Chall. Rep., Aster. (1888), p. 216, ibique citt. 

 Loc. New Britain. 



The ' type ' of this species was collected by H.M.S. ' Challenger ' off the Philippines. 

 It would appear to be rare. 



20. Pentaceros lincki, \ „ „ ^ „ r< ,_ nj „_ 

 T r>, r. t, J see Bell, P. Z. S. 1884, p. 72. 

 Loc. Blanche Bay. I l 



21. Pentaceros nodosusA . , „„ 



T m l ti 1(l - *• C. p. 70. 



Loc. Blanche Bay. / r 



These two species herd together in the narrow strait which divides the island of 

 Matupi from the mainland. According to Dr Willey's observations the two species 

 grade into one another both as regards colour and nodosity. He thinks they are 

 either varieties of one species or else that they cross-breed together and produce hybrids. 



22. Pentaceropsis obtusata. 



Asterias obtusata, Bory de Saint Vincent, Encycl. Method. (1827), p. 140, pi. ciii. 



