HOLOTHUROIDEA. 
Ech. 9 
emended ; Haplodactyla roretzii , which is now called Ancyroderma 
rorctzii ; Cucumaria longipeda, and Stichopus japonicus. 
Bell (8) divides the genus Psolus into 3 sub-genera, Psolus, s. str. 
( Eupsolus ), Lophothuria , and Hypopsolus , subg. n. He describes as new 
Psolus ( Lophothuria ) peronii and Hypopsolus ambulator (Australia), and 
has notes on some of the known species. 
Cucumaria frauenfeldi, sp. n., Ludwig, (30) p. 130, Cape of Good Hope. 
Thyonidium magnum , sp. n., id. 1. c. p. 132, Amboina. 
Thyonidium Jlavum , sp. n., Greef, (20) p. 158, Rolas. 
Stichopus (?) tizardi , sp. n., TluSel, P. R. Soc. Ed. xi. p. 696. 
Stichopus maculatus, sp. n., Greef, (20) p. 158, Rolas. 
Thdei (38) describes the following new Elasipoda , a term preferred to 
the earlier Elasmopoda , as beiug more correct: — 
Fam. I. Elpidid^b. 
Parelpidia, g. n. “ Body very long, cylindrical, Synapta-shaped. 
Processes of the dorsal surface almost inconspicuous. Calcareous 
deposits four-armed, with a single long central process, directed 
outwards.” For Elpidia elongata and P. cylindrica, sp. n. 
Elpidia rigida, purpurea , willemoesi, incerta , ambigua , spp. nn. 
Scotoplanes, g. n. “ Distinguished from Elpidia by the presence 
of unbranched spicula, or three-armed bodies, and by the con- 
stant possession of C-shaped spicules.” For E. globosa , E. 
mollis , E. papillosa, E. murrayi ; S. albida, robusta, insignis , 
spp. nn. 
Kolga nana — Elpidia nana. 
Peniagone, g. n. “ Dorsal surface with a large lobe-like appendage 
anteriorly, and commonly with some minute processes.” For 
P. wyvillii , P. lugubris , P. horrifer , P. atrox, P. naresi, P. chal- 
lenged, P. vitrea , P. affinis, spp. nn. 
Scotoanassa , g. n. “ Body very depressed, with a large brim round 
its anterior and posterior ends.” For S. diaphana, sp. n. 
Enypniastes , g. n. Pedicels round the posterior end of the body. 
For E. eximia , sp. n. 
Achlyonicc paradoxa, now called A. ecalcarca ; A. lactea, sp. u. 
Fam. II. Dejmatidj*. 
Lcetmogone spongiosa, for Cryodora spongiosa. The genus Cryodora 
is annulled. 
Pannychia , g. n. Distinguished from Lcetmogone by having 20 
tentacles, and a double row of pedicels on the odd ambulacrum. 
’ For P. moseleyi , sp. n. 
Fam. III. Psych ropotid^e. 
Psychrotrephes , g. n. “ Body very thin and depressed, with the 
brim round its anterior and posterior extremities rather broad. 
Mouth and anus ventral, at some distances from the ends of the 
body. Tentacles ten.” Odd ambulacrum naked. For P. exi - 
gua, sp. n. 
Euphronides, g. n. Odd ambulacrum with a double row of pedi- 
cels, dorsal surface with a large appendage crossing the odd 
iuterambulacrum. For E. depres sa, sp. n. 
