174 ECHINODERMA OF THE INDIAN MuSEUM, PART VII. 



anteriorly directed spines, the bases of which do not involve more than the distal 

 third, or at most tlie distal half, of the segments: similar, though smaller, spines 

 occur along the inner distal edge of the pinnule ; P.. is most like P, , 4 mm. long 

 with fifteen segments, becoming as long as broad on the fifth and from one third 

 to one half again as long as broad distally ; second and third segments sometimes 

 devolopiftg distal carinate processes, the third and following obscurely carinate 

 dorsally with overlapping and finely spinous ends which are especially produced 

 along the dorsal rounded-carinate ridge and along the ventral angles ; following 

 pinnules in general similar ; distal overlap of tiie segments gradually becoming 

 more uniform in height, after P^ becoming an even finely spinous projection 

 which disappears altogether in the distal pinnules : the distal pinnules are slender 

 and smooth, 9 mm. in length. 



The colour in spirits is dull yellowish, the arms and pinnules thickly blotched 

 with purple; or, brownish yellow; or, yellow, the rays and arm bases bordered 

 with purple, the pinnules, cirri, and occasional narrow bands on the arms purple; 

 or, violet, the cirri yellow. 



The type in the Leyden Museum, from Andai, New riuinea, resembles the 

 specimen from Singapore which I described as Oligometra pvlrhella. The serra- 

 tion of the pinnules is not greatly accentuated. The purple bands on the arms 

 are very narrow. 



OLIGOMETRA SERRIPINNA var. ELECTRO. 

 Oligometra si-rripiiiva var. elecirce 1911. A. H. Clark, Proc. U. fS. Nat. Mus., 

 vol. 40, p. 51. 



Habitat.— Red Sea, south-east of Massawa. 

 Depth. — 20 fathoms. 



OLIGOMETRA SERRIPINNA var. OCCIDENTALIS. 

 Olirpinetta serrijn'nna var. occidentaJis 1911. A. H. Clark, Proc. U. S. Nab. 

 Mus., vol. 40, p. •■{■5. 



Habitat. — Mauritius : Cargados Carajos. 

 Depth. — Littoral, and down to 3(1 fathoms. 



OLIGOMETRA CARPENTER! . 



Antedon carpenteri 18S4. Bell, Report Zool. Coll. H.M.S. " Alert, " ]>. 1.57, pi 



X, figs. A a-c. 

 Antedon serripitma 1894. Bell, P. Z. S. , 1894, p. .394. 

 Antedon milberti (part) 1894. Bell. P. Z. S., 1S94, p. 394. 

 Oligometra car penleri 1908. A. H. Clark, Proc. Biol. See. Washington, vol. 21, 



p. 12ti. 



Habitat. — Queensland; Piinee of Wales Clianiicl , north-western Australia; 

 Baudin island ; Holothuria Bank ; Bassett-Sniith Bank. 



