79 



f 3 from 16 to 25 arms 



g 1 P„ and P 3 stout, flagellate distally, very long; P s markedly 

 longer and stouter than P 2 ; 31 — 42 cirrus segments; colour 

 usually light, with the cirri purple, at least distally (Cey Ion 

 and the ea stern coast of India to Burma) . . reynaudii 

 g 2 lower pinnules slender and relatively short, P v P, and P s 

 being not ' greatly different in length ; P 3 and P„ are 

 markedly stouter than P 15 and P 3 is usually slightly stouter 

 than P 2 though the reverse often occurs; 31 — 35 cirrus 

 segments; colour violet, the cirri light yellow, sometimes 

 entirely light yellow brown (western coast of India) compta 

 d 3 21 — 32 (rarely over 30) cirrus segments; P 2 and P 3 similar and 

 of about the same length, not greatly longer than P 1 , though stouter 

 e 1 brachials beyond the proximal very short with strongly produced 

 distal edges; 26 — 31 cirrus segments; 14 — 18 arms (Sin- 

 gapore) aspera 



e 2 brachials longer with more oblique ends which overlap only 

 very slightly if at all 



f 1 11 — 15 arms (Ceylon and the eastern coast of India) bengalensis 

 f 3 16 — 18 arms (Amboina to the Philippine Islands) . affinis 



1. Heterometra crenulata (P. H. Carpenter). 



VON Graff. Das Genus Myzostoma, 1877, pp. 15, 22, 72, 79 {Comatula dubia). 

 P. H. CARPENTER, Journ. Linn. Soc. (Zool.), vol. 16, 1882, p. 507 {Antedon crenulata). 

 Bell. Proc. Zool. Soc, London, 1882, p. 534 {Antedon decipiens and Antedon irregularis). 

 P. H. Carpenter. Proc. Zool. Soc. London, 1882 (1883), p. 746 {Antedon decipiens, A. crenulata 



and A. irregularis). 

 Bell. „Alert" Report, 1S84, p. 159, pi. il, figs. B, Ba {Antedon decipiens); p. 161, pi. 13, 



figs. A, Aa- — c {Antedon irregularis). 

 VON GRAFF. "Challenger" Reports. Myzostoma, 1SS4, pp. 15, 18 {Antedon dubia); pp. 15, 16 



17 {Antedon bidentata); Narrative, vol. 1, 1885, part 1, p. 316 {Antedon bidentata); Myzostoma, 



1887, part 61, p. 7 {Antedon bidentata). 

 P. H. Carpenter. Quart. Journ. Micros. Sci., vol. 28, 1887, p. 386 {Antedon irregularis). 

 "Challenger" Reports. Comatulae, 188S, pp. 1 10, 197, 258, pi. 36, figs. 1—6 {Antedon 



dubia); pp. 97, 262 {Antedon bidentata); p. 256, pi. 36, figs. 1—6; pi. 48, figs. 3—5 ; pi. 49, 



figs. 1 — 2 {Antedon variipinna). 

 BRAUN. Centralbl. fur Bakteriol.- und Parasitenkunde, vol. 3, 1888, p. 185 {Comatula dubia); 



p. 186 {Antedon bidentata). 

 HaRTLAUB. Nova Acta der ksl. Leop.-Carol. deutschen Akademie der Naturforsch., vol. 58, 



1891, N° 1, p. 17 (in key) {Antedon variipinna). 

 Bell. Proc. Zool. Soc. London, 1894, p. 394 {Antedon variipinna). 

 KOEHLER. Mem. soc. zool. France, vol. 8, 1895, p. 419 {Antedon variipinna). 

 CHADWICK. in Herdman, Ceylon Pearl Oyster Report, part 2, 1904, p. 157 {Antedon variipinna). 

 Minckert. Archiv für Naturgesch., 1905, I, p. 212 (footnote) {Antedon variipinna and Antedon 



dubia). 

 A. H. Clark. Smithsonian Miscellaneous Collections (Quarterly Issue), vol. 52, 1908, part 2, 



p. 214 {Himerometra anceps); p. 216 {Himerometra variipinna). 



