138 THE VOYAGE OF H.M.S. CHALLENGER. 



The first two or three pairs of pinnules long and flagellate, with numerous short 

 and wide joints. 



A. Third pinnule equal to, or not much shorter than the second. 



I. Joints of the third pinnule mostly wider than long, as in the first and second. 

 Arm-joints triangular, but quite short. 



a. Forty or more cirrus-joints. Axillaries as wide as long. Arms 



smooth. Third pinnule most like the second, . . . 1. eschrichti, Mull., sp. 



b. Less than forty cirrus-joints. Axillaries wider than long. Arm- 



joints overlap. Third pinnule most like the fourth, . . 2. antarctica, n. sp. 



II. Third pinnule has fewer hut much longer joints than the first and second. 



a. Less than forty cirrus-joints. Arm-joints triangular. 



1. Arm-joints short and much wider than long, . . .3. australis, n. sp. 



2. Arm-joints as long as or longer than wide, . . .4. rhomioidea, n. sp. 



b, Over forty cirrus-joints. Arm-joints quadrate, and as long as or longer 



than wide, ....... mayellanica, Dell. 



B. Third pinnule composed of a few elongated joints, and much shorter than the 



second. 

 t I. About forty cirrus-joints. The middle arm-joints quadrate, . . 5. quadrata, n. sp. 



II. Twenty-five to thirty cirrus-joints. The middle arm-joints triangular ; 



genital pinnules plated, ...... barentd, Carpenter. 



1. Antedon eschrichti, Mull., sp. (PL I. figs. 8, a-d; PI. XXIV. figs. 4-14, woodcut, 

 figs. 4, c, D, on p. 154). 



Specific formula — A. — . 



1841. Alecto Eschrichtii, Miiller, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, 1841, p. 183. 

 1849. Comatula (Alecto) Eschrichtii, Miiller, Abhandl. d. k. Akad. d. Wiss. Berlin, 1847 [1849], 



p. 254. 

 1854. Alecto Eschrichtii, Stimpson (?), Mar. Invert. Grand Manan, 1S53 [1854], p. 12. 

 1857. Alecto Eschrichtii, Liitken, Vidensk. Meddel. nat. Foren. Kj0benhavn, 1857, p. 55. 

 1860. Alecto glacialis, Walker, Journ. Dublin Sob., 1860 [1862], vol. iii. p. 70. 

 1862. Comatula Eschrichtii, Dujardin and Hupe, Hist. Nat. des Zoophytes, Echinodermes Paris, 



1862, p. 199. 

 1866. Antedon Eschrichti, Loven, Ofversigt k. Vetensk.-Akad. Forhandl., 1866, No. 9, pp. 224, 



230, figs. i-m. 

 1866. Antedon Eschrichtii, Verrill, Proc. Boston Soc. Nat. Hist., 1866, vol. x. p. 343. 

 1872. Antedon escrichtii, Wyville Thomson, Proc. Roy. Soc. Edin., 1872, vol. vii. p. 764. 

 1876. Comatula Eschrichtii, Quenstedt, Petrefactenkunde Deutschlands, 1876, Bd. iv. Asteriden 



und Encriniden, p. 165, Tab. 96, fig. 16. 



1879. Antedon Eschrichtii, P. H. Carpenter, Trans. Linn. Soc. Lond. (Zool.), ser. 2, 1879, 



vol. ii. p. 29. 



1880. Antedon Eschrichtii, d'Urban, Ann. and Mag. Nat. Hist., 1880, ser. 5, vol. vi. p. 261. 



1881. Antedon Eschrichtii, Duncan and Sladen, Memoir Arctic Ecliinodermata, London, 1881, 



p. 73, pi. vi. figs. 1-4. 



1882. Antedon Eschrichtii, Hoffmann, Niederland. Arch. Zool., 1S82, Supplement Bd. i., Lief 



3, p. 1. 

 1882. Antedon eschrichti, Bell, Proc. Zool. Soc. Lond., 1882, p. 534. 

 1882. Antedon eschrichti, P. H. Carpenter, Ibid., p. 746. 



