42 HOLOTHURIOIDEA. 
1. Thyone fusus. (Plate V. fig. 1 & Plate VII. fig. 3.) 
Holothuria fusus, O. F. Mill. Zool. Dan. 1. (1788) p. 11, pl. x. figs. 5 
& 6; Gmel. Syst. Nat. xiii. (1780) p. 5141; Lamk. An. s. Vert. 
iti, (1816) p. 74; Rathke, Nov. Act. xx. (1848) p. 140, pl. vi. 
figs. 24 & 25. 
Holothuria penicillus, O. #. Mill. Zool. Dan. i. (1788) p. 10, pl. x. 
fig, 4. 
Holothuria papillosa, Gmel. Syst. Nat. xiii. (1788) p. 8140; O. F. 
Miill. Zool. Dan. iii. (1789) p. 47, pl. eviii. fig. 5. 
Miilleria pupillosa, Johnston, Loudon’s Mag. Nat. Hist. vii. (1834) 
p. 584, tig. 66. 
Thyone fusus, dg. Mem. Soc. Neuchat. i. (1885) p. 181; Koren, Nyt 
Mag. iv. (1845) p. 208, pl. i.; Diiben § Koren, Vet.-Akad. Hdlg. 
1844 (1846), p. 308, pl. v. figs. 42-48, & pl. xi. fig. 52; Gray, 
Brit. Rad. (1848) p. 7; Sars, Nyt Mag. x. (1859) p. 79, pl. ii. 
figs. 49-51; ed. Norg. Ech. (1861) p. 111; Semper, Hol. Phat. 
(1868) p. 273; Norman, Rep. Brit. Assoc. 1868 (1869), p. 317 ; 
Hodgs. Trans. Northumb. § Durham, iv. (1872) p. 146, pl. ii. 
figs. 19-40; Marenz. Abh. z.-b. Ges. Wien, xxiv. (1874) p. 312; 
Ludw, Mitth. zool. Stat. Neap. i. (1879) p. 567; Graeffe, Arb. 
Inst. Wien, iii. (1881) p. 843; Barrots, Cat. Crust. (1882) p. 53; 
Lampert, Seewalz. (1885) p. 161; Théel, Chall. Rep. Hol. (1886) 
p. 184; Bell, Proc. R. Irish Ac. iv. (1886) p. 620; Hérouard, 
Arch. Zool. vii. (1889) p. 689. 
Thyone papillosa, Forbes, Brit. Starf. (1841) p. 253; Thompson, Nat. 
Hist. Irel. iv. (1856) p. 444. 
Anaperus fusus, 7’roschel, Arch. f. Nat. 1846, p. 62. 
Thyone floccosa[n. n.], Norman, Rep. Brit. Assoc. 1863 (1864), Trans. 
p. 106 (teste J.). 
Thyonidium pellucidum, Barrows, Cat. Crust. (1882) p. 49. 
Semperia barroisi, Lampert, Seewalzen, (1885) p. 155; Théel, Chall. 
Rep. Hol. (1886) p. 268. 
? Thyone subvillosa, Héroward, Arch. Zool. vii. (1889) p. 687. 
Body irregularly fusiform, not curved, and with no tail-like end. 
Richly covered with podia. 
Deposits ordinarily with four holes, occasionally also with smaller 
outer holes, irregularly oval in form ; spire ends in small spines. 
Whitish in colour ; about a couple of inches long, and one wide. 
Distribution. Eastern side of North Atlantic to Lofoten; Medi- 
terranean. 10 to 80 fms. 
a. Loch Etive, 15-20 fms. J. Murray, Esq. 
b-d. Between Canna and Rum, 80-100 fms. J. Murray, Esq. 
e. Weymouth. 
2. Thyone raphanus. (Plate V. fig. 2 & Plate VIII. fig. 3.) 
Thyone raphanus, Dib. § Kor. Vet.-Akad. Hdlg. 1844 (1846), pp. 219 
& 3a1, pl. v. figs. 49-55, pl. xi. figs. 58 & 59; Thompson, Nat. Hist. 
Trel. iv. (1856) p. 444; Kinahan, Nat. Hist. Rev. (1859) p. 369; 
Sars, Norg. Ech. (1861) p. 112; Norman, Rep. Brit. Assoc. 1868 
(1869), p. 817 ; Semper, Hol. Phil. (1868) p. 278; non Marenz. 
Verh. z.-b. Ges. Wien, xxvii. (1877) p. 118 (teste Marion, Ann. 
Sct. Nat, viii. (1879) p. 40); Hodge, Tr, Nat. Hist. Soc. North, iv. 
