No.414.] MORTH-AMERICAN INVERTEBRATES. 
Liosoma Brandt 
Liosoma Stimpson 
Lophothuria Verrill 
Ocnus Forbes 
Sclerodactyla Ayres 
Semperta Lampert 
Stereoderma Ayres 
Synaptula Oerstedt 
Thyonella Verrill 
Trochinus Ayres 
= Chiridota 
= Trochostoma 
= Psolus 
= Cucumaria 
= Cucumaria 
= Thyone 
= Cucumaria 
Lyone 
= Synapta 
= Thyone 
= Chiridota 
of th 
“ee 
e key 
485 
Below are the specific names the use of which is no longer 
correct : 
affinis (Botryodactyla) Ayres 
albicans (Synapta) Selenka 
albida (Cladodactyla) Brandt 
albida (Cucumaria) Ludwig 
ayresii (Ocnus) Stimpson 
ayresii (Synapta) Selenka 
botellus (Holothuria) Selenka 
musculosum (Thyonidium) Ayres 
oolitica (Molpadia) Selenka 
pallidus (Trochinus) Ayres 
pauper (Embolus) Selenka 
rtz 
C C ladodactyla Brandt 
Bentacta 3 Holothuria 
na (Holothuria) Pourtales = Holothuria atra 
= Cucumaria frondosa 
= Synapta inherens 
= Cucumaria populifer “ 
= Cucumaria populifer * 
= Cucumaria minuta “ 
= Synapta inherens 
= Holothuria impatiens “ 
= Myriotrochus rinkii * 
= Thyone briareus 
= Thyone briareus 
= Eupyrgus scaber 
Psolus phantapus 
= Thyone elongata 
of the key. 
partim Zrochostoma boreale of the 
key. 
= Chiridota levis 
= Trochostoma ooliticum * 
7 Sti 
Pellucida (Sy napta)4 ieu] = Synapta inherens 
partim Zvochostoma ooliticum of 
the key 
of the key. 
O. F. } =Cucumaria frondosa “ 
= Cucumaria nigricans * 
= Synapta vivipara 
= Orcula barthii 
= Cucumaria miniata “ 
4 
& 
Lii 
