36 HOLOTHURIOIDEA. 
along the ambulacra, and may also be found sporadically on the 
interambulacra. 
Key to the Species. 
A. Podia confined to ambulacra (stichopod). 
I, Podia non-retractile. 
Skin smooth! ... ss. cieptmyriele tele} ere 1. C. hyndmani. 
DKIN.Very Sill ct teem eee eRe 4. C. lactea. 
II. Podia retractile. 
a. Skin smooth. 
Attenuated at either end............ 3. C. pentactes. 
Body sac-like or elongated ..,....... 2. C. planet, 
6. (Skim 200eh yrs en eke meee oe ete 5. C. hispida. 
B. Podia scattered (sporadipod) ........--52+.+-0> 6. C. frondosa. 
1. Cucumaria hyndmani. (Plate II. fig. 1.) 
Holothuria hyndmani, Thompson, Ann. § Mag. v. (1840) p. 100. 
Cucumaria hyndmanni, Forbes, Brit. Starf. (1841) p. 225; Dib. § 
vor. Vet.-Akad. Hdlg. 1844 (1846), p. 299, pl. xi. fig. 56, pl. iv. 
figs. 8-14; Sars, Norg. Ech. (1861) p. 101; Norman, Rep. Brit. 
Assoc. 1868 (1869), p. 8317; Lampert, Seewalzen, (1885) p. 147 ; 
Théel, Chall. Rep. Hol. (1886) p. 108; Chadwick, Rep. Liverpool 
Biol. Soc. iii. (1889) p. 180; Hoyle, J. Linn. Soc, xx. (1890) p. 458 ; 
Sladen, Proce. R. Irish Ac. i. (1891) p. 702. 
Cucumaria hyndmani, Thompson, Nat. Hist. Irel. iv. (1856) p. 448; 
Marenzeller, Verh. zool.-bot. Ges, Wien, xxiv. (1874) p. 809. 
Cucumaria pentactes, Brady § Robertson, P. Z. 8. 1871, p. 690. 
Body tapering a little or hardly at all posteriorly ; skin whitened 
and rough, with large stout scales of considerable thickness ; podia 
only slightly retractile, pretty regularly set in two close rows along 
each ambulacrum. 
Deposits as shown in Pl. II. fig. 1; only scales and rods present. 
Not more than four inches long, often less. 
The podia are of a dark colour, and the tentacles are pale. 
Distribution. British and Norwegian coasts ; Mediterranean. To 
420 fms. 
a-c. 56° 13’ N., 14° 18’ W., 420 fms. ‘ Porcupine’ Exp. 
d-f. 56° 7' W., 14° 19’ W., 630 fms. ‘Porcupine’ Exp. 
g. Loch Craignish. Hon. A. E. Gathorne Hardy. 
h. West coast of Scotland. John Murray, Esq. 
t-k. 51° 57' N., 18° 89' W., 251 fms. ‘ Porcupine’ Exp. 
1, m. Firth of Lorn, 70-80 fms. John Murray, Esq. 
n. Firth of Lorn, 20 fms. John Murray, Esq. 
o-y. Firth of Lorn, 50-70 fms. John Murray, Esq. 
zg, Cornwall. 
a’, b'. Off Liverpool. 
