38 IIOLOTHUEIOIDEA. 



Cucumaria elongata, Dub. 8f Kor. Vet.-Akad. Hdlgr. 1844 (1846), 

 p. 301, pi. iv. fig. 14, & pi. xi. fig. 56 ; Sars, Nyt May. x. (1859) 

 p. 76, pi. ii. figs. 44-48 ; Marenzeller, Verh. zool.-bot. Ges. Wien, 

 xxiv. (1874) p. 306; Theel, Chall. Rep. Hoi. (18S6) p. 106. 



IIuli ithuria fusiformis, Forbes fy Goodsir, Athenreum, 1839, no. 618, 

 p. 647; Forbes, Brit. Star/. (1841) p. 219; Norman, Hep. Brit. 

 Assoc. 1868 (1869), p. 316. 



Body elongated, sometimes very narrow, and rather frequently 

 a good deal narrower posteriorly than anteriorly. Podia not in 

 regular double rows at ends of body, varying somewhat in the extent 

 to which they may be retracted after death. 



Deposits irregular in form, but often of large size and sufficiently 

 numerous to make the body-wall stiff. 



Of all sizes, up to six incbes, as C. montagui is probably only a 

 variety. 



Distribution. Eastern side of North Atlantic, from Spanish coast 

 to within Arctic circle ; White Sea (?) ; Mediterranean. 10 to 

 50 fms. 



a-e. Plymouth. 

 /. Weymouth. "W. Thompson, Esq. 



4. Cucumaria lactea. (Plate III. fig. 2.) 



Holothuria lactea, Forbes fy Goodsir, Athenceum, no. 618, 1839, 



p. 647. 

 Holothuria brunnea, Thompson, Ann. § May. v. (1840) p. 100. 

 Ocnus lacteus, Forbes, Brit. Star/. (1841) p. 231 ; Thompson, Nat. 



Hist. Del. iv. (1856) p. 443 ; Lampert, Seewalzen, (1885) p. 131. 

 Ocnus brunneus, Forbes, op. cit. p. 229 ; Thompson, op. cit. p. 443. 

 Cucumaria lactea, Dub. $ Kor. Vet.-Akad. Hdlg. 1844 (1846), p. 297, 



pi. iv. figs. 3-7, pi. xi. fig. 55 ; Sars, Nora. Ech. (1861) p. 101 ; 



Barrois, Cat. Crust. (1882) p. 51 ; Theel, Chall. Rep. Hoi. (1886) 



p. 101. 

 Cucumaria brunnea, Herouard, Arch. Zool. expSr. vii. (1889) p. 682. 

 Holothuria badotriae, Dalyell, Powers, i. (1851) p. 72, pis. xiii. & xiv. 



In many points resembling C. planci. 



Body pretty regularly cylindrical ; skin rather stiff and rough, 

 white or brown in colour. Podia in a single zigzag row in each 

 ambulacrum, feebly retractile. 



Deposits not unlike those of C. planci, but the holes of the disks 

 larger and the knobs less numerous. 



Not much more than an inch long and frequently smaller. 



Distribution. British seas, and West Norway. 0-50 fms. 



a-d. Plymouth. 



5. Cucumaria hispida. (Plate IV. fig. 1.) 



Eupyrgus hispidus, Barrett, Ann. $ Mag. xx. (1857) p. 40, pi. iv. 

 fig. 1. 



Echinocucumis typica, Sars, Forh. Vid. Selsk. Christ. 1858 (1859), 

 p. 174 ; id, Norg. Ech. (1861) p. 102, pi. x. figs. 11-20; Semper, 



