. P 9 m n r -I Fig. 23. lophonproximum (Ridley), showing variation in size and shape of the main acanthostyH. a, I. chelifer ostia-magna, Wilson (type); b, I. chelifer, Ridley and Dendy (co-type: 87. 5. 2. 157); c, I. chelifer, Ridley and Dendy (type); d, I. chelifer, Ridley and Dendy (Lambe's specimen); e, Giog;f, I. indentatus, Wilson (type); g. I. lamella indivisus, Wilson (type);//,/. lamella, Wilson (type); /, /. pattersoni (Bowerbank), Ridley and Dendy (Challenger Sts. 308 and 311); 7, /⢠chelifer, Ridley and Dendy (Thiele's specimen); k, D 255â ,l,D256;m,D 251; n, D 739; 0, D 740;

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. P 9 m n r -I Fig. 23. lophonproximum (Ridley), showing variation in size and shape of the main acanthostyH. a, I. chelifer ostia-magna, Wilson (type); b, I. chelifer, Ridley and Dendy (co-type: 87. 5. 2. 157); c, I. chelifer, Ridley and Dendy (type); d, I. chelifer, Ridley and Dendy (Lambe's specimen); e, Giog;f, I. indentatus, Wilson (type); g. I. lamella indivisus, Wilson (type);//,/. lamella, Wilson (type); /, /. pattersoni (Bowerbank), Ridley and Dendy (Challenger Sts. 308 and 311); 7, /⢠chelifer, Ridley and Dendy (Thiele's specimen); k, D 255â ,l,D256;m,D 251; n, D 739; 0, D 740; p, D 257; q, D 254, D 258; r, D 431; s, D 252; t, D 837; u, D430; V, Alebion proximum, Ridley (type); w, lophon proximus (Ridley), var. reticularis, Hentschel. All figures x 300. Figs. a,f, g, h after Wilson; fig. d after Lambe; fig.; after Thiele. Fig. w from a pre- paration from the type.

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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti