36 



HOLOTHURIOIDEA. 



along the ambulacra, and may also be found sporadically on the 

 interambulacra. 



Key to the Species. 



A. Podia confined to ambulacra (sticbopod). 



I. Pudia non-retractile. 



Skin smooth 1 • 



Skin very stiff 4. 



II. Podia retractile. 



a. Skin smooth. 



Attenuated at either end 3. 



Body sac-like or elongated 2. 



j3. Skin rough 5. 



B. Podia scattered (sporadipod) 6. 



C. hyndmani. 

 C. lactea. 



C. pentactes. 

 C. planet. 

 C. hispida. 

 C.fi'ondosa. 



1. Cucumaria hyndmani. (Plate II. fig. 1.) 



Holothuria hyndmani, Thompson, Ann. 8p May. v. (1840) p. 100. 



Cucumaria h'yndmanui, Forbes, Brit. Starf. (1841) p. 225; Bub. 8f 

 Kor. Vet.-Akad. Hdlg. 1844 (1846), p. 299, pi. xi. fig. 56, pi. iv 

 figs. 8-14; Sars, Norg. Ech. (1861) p. 101 ; Norman, Hep. Brit 

 Assoc. 1868 (1809), p. 317; Lampert, Seewalzen, (1885) p. 147 

 Theel, Chad. Rep. Hoi. (1886) p. 108 ; Chadiviek, Rep. Liverpool 

 Biol. Soc.in. (1889) p. 180 ; Hoyle, J. Linn. Soc.xx. (1890) p. 458 

 Sladen, Proc. R. Irish Ac. i. (1891) p. 702. 



Cucumaria hyndmani, Thompson, Nat. Hist. Irel. iv. (1850) p. 443 

 Marenzeller, Verh. zool.-bot. Ges. Wien, xxiv. (1874) p. 309. 



Cucumaria pentactes, Brady §• Robertson, P. Z. S. 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. 

 d-f. 



[/■ 



h. 



i-k. 



I, m. 



n. 



o-y. 



z. 



a', b\ 



56° 13' N., 14° 18' W., 420 fms. 



56° 7' W., 14° 19' W., 630 fms. 



Loch Craignish. 



West coast of Scotland. 



51° 57' N., 13° 39' W., 251 fms. 



Firth of Lorn, 70-80 fms. 



Firth of Lorn, 20 fms. 



Firth of Lorn, 50-70 fms. 



Cornwall. 



Off Liverpool. 



' Porcupine ' Exp. 



' Porcupine ' Exp. 



Hon. A. E. Gathorne Hardy. 



John Murray, Esq. 



' Porcupine ' Exp. 



John Murray, Esq. 



John Murray, Esq. 



Johu Murray, Esq. 



