OPISTHOBRANCHIATA FROM THE ABROLHOS ISLANDS. 523 
Arnmia (Pleuropht/llidia) cygnea (Bergh), recorded from Swan River. 
Madrella ferruginosa Aid. & Hanc, recorded by Odhner from Cape Jaubert. 
HOLOHEPATICA. 
Hexabranclius im2:>er/,alis Kent, recorded from the Abi'olhos. 
Kentrodoris maculosa (Cuvier), recorded from Baye des Chiens marins. 
Ceratosoma brevicaudatimi Abraham, recorded from West Australia. 
Ceratosoma corallinum Odhner, recorded from Cape Jaubert. 
Phyllidia varicosa Bergh, recorded from Dampier's Archipelago. 
Trevelyana marginata Odhner, recorded from Cape Jaubert. 
This is a small list of only 11 species and the pre'sent collection contains 
16 species, only three of which have been recorded previously from West 
Australia, and so the total now known from the coast is 24 — a very small 
number when one considers the length of the coast-line and the fact that 
there is every indication of its possessing a rich fauna. 
The following species are here represented : — 
TECTIBRANCHIATA. 
Tethjs lAplysia] gigantea (Sowerby). 
Tethys \_Aplysia\ denisoni (Smith). 
Dolabrifera pelsartensis, sp. nov. 
Bertliella plumula (Montagu). 
ASCOGLOSSA. 
Placobranclius expansa, sjj. nov. 
NUDIBEANCHIATA. 
HOLOHEPATICA. 
Sphwrostoma [ Tritonia'\ dakini, sp. nov. 
Hexabranclius imperialis Kent. 
AUoiodoris hedleyi, sp. nov. 
Aster onotus fuscus, sp. nov. 
Glossodoris [ Chromodoris'] loestr alien sis, sp. nov. 
Aphelodoris afinis Eliot. 
Ceratosoma brevicaitdatum Abraham. 
Dendrodoris \_Doriopsis~\ nigra (Stimpson). 
Dendrodoris \_Doriopsis'\ mammosa (Abraham). 
Nembrotlia purpureolineata, sp. nov. 
Notodoris gardineri Eliot. 
With such a small list it is hardly profitable to spend much time in the 
discussion of the distribution and relationships of its members, for as soon as 
any systematic collecting is done the list will be enormously increased. 
Professor Dakin has called attention to one or two points in his general 
description of the expedition (32) that need brief consideration here. In 
