H0L0THURI01 DEA. (IV, B.) Echin. 61 
Elpidiogone , Peniagone , Scotoanassa , Enypniastes ; Perrier (254) 
p. 405. 
Elpidiogone n. g. of Elpidiidae (p. 412) diagnosis (p. 424) based on spp. 
of Elpidia given in this order: E. amhigua , rigida , verrucosd , and 
? incerta (p. 425), ho genotype ; Perrier (254). 
Euphronides , revised diagnosis, list of spp. (p. 433), A’, auriculata , 
descr. and first figd. (p. 434, pis. xiii, xx), E. depressa restr. to 
specimens fr. Juan Fernandez, that for E. Atlantic refd. to E. auricu- 
lata (p. 434), E. talismani R. Perr. 1896, S. of Fayal, ca. 2200 mm., 
descr. and sclerites figd. (p. 441, pi. xx), E. violacea R. Perr. 1896, off 
Morocco, 2210 rrt., descr. and sclerites figd. (p. 438, pi. xx) ; Perrier 
(254). 
Eupyrgus scaber; Mortensen (227) p. 89: spicules descr.; Norman 
( 239) p. 412, pi. xxvii: Liitken’s description of calcareous ring 
confirmed ; Michailovsrij (223) pp. 469, 521. 
Gastrothuria R. Perr. 1899, diagnosis, genus justified (p. 468), G. limbata 
R. Perr. 1899, B. of Biscay, 564 m., descr. and sclerites figd. (p. 469, 
pi. xv) ; PErrier (254). 
Havel ockia n. g. of Cucumariidae (p. 198), with genotype H. herdmani 
n. sp. S. of Adam’s Bridge, 4-40 fm. (p. 197, pi. ii) ; Pearson (250). 
Herpysidia , v. sub Bathyplotes. 
Holothuria , diagnosis; Perrier (254) p. 473. H. aspera ; Nichols (236) 
p. 246. H. atra ; Gardiner (99) : Whitelegge (322) p. 13 : variations ; 
Pearson (250) p. 202. II. calcarea et ecalcarea, vide Stichopus 
tremidus. H. farcimen , descr. and sclerites figd. ; Perrier (254) 
p. 477, pi. xv. H. forskali ; Russo (277): inch II. tubulosa Haines 
1853 ; Nichols (236) p. 245. H. gallensis n. sp. lagoon at 
Galle, Ceylon ; Pearson (250) p. 203, pi. iii. II. intestinalis ; 
Nichols (236) p. 245: vide etiam sub AUantis et Mesothuria. 
II. Tcurti , growth of spicules ; Pearson (250) p. 200, pi. iii. H. mammata , 
sclerites descr. ; Perrier (254) p. 474, pi. xv. H. marmorata , compared 
with H. tenuissima , wh. is perh. syn. (p. 202), II. monacaria , podia 
(p. 201) ; Pearson (250). H. murrayi , refd. to Mesothuria ; Perrier 
( 254) p. 316. II. nigra ; Woodcock (330). II. poli ; Russo (277). 
II. sanciorii , purely Mediterranean, distinguished fr. II. farcimen , 
which occurs at Azores; Perrier (254) p. 481. H. tenuissima , perh. 
inch H. vitiensis , H. lcoellikeri , and II. clemens ; Pearson (250) p. 201. 
II. tremula; Nichols (236) p. 245: Petersen (259). H. tubulosa ; 
Enriques (73): Guenther (121): Lyon (206): Russo (277): (?); 
Karawaew (164): osmosis; Henri & LAlou (140, 141): dissection; 
Kuekenthal (173) p. 140. H. vagabunda\ Pearson (250) p. 201. 
H. verrilli ; Richard (271) p. 69: vide etiam sub AUantis et Meso- 
thuria. 
Holothuriidae, diagnosis, = Holothuriinae Ludw., comprises Holothuria , 
Muelleria, Labidodemas , Stichopus , Gastrothuria ; Perrier (254) 
p. 466. 
llypsilothuria , vide Ypsilothuria. 
Irpa, maintained with single sp. I. abyssicola ; Perrier (254) p. 416. 
Kolga, maintained for K. nana , hyahna , and ludwigi (p. 416), K. furcata 
refd. to Periamma (p. 418); Perrier (254). K. hyalina , notes; 
Michailovsrij (223) p. 463. 
Labidodesmus , v. sub Cucumaria. 
Labidoplax buski , inch Synapta tene.ra Norm, and many specimens refd. 
to S. inhaerens ; OsTergren (244) p. 12. 
Laetmogone , diagnosis, list of Spp. (p. 388), L. brongniarti, syn. of 
L. violacea (pp. 388, 390), L. jourdaini , is var. of L. violacea 
(pp. 388, 397), L. sjoongiosa , syn. of L. violacea (pp. 388, 394) ; 
Perrier (254). L. violacea ; Nichols (236) p. 246: inch L. brongni- 
