554 PROF. C. H. 0*D0N06HUB : REI'ORT ON 
genus of its own, often but incorrectly termed Cassella H. & A. Adams, 
1858 (3). 
The Goniodoris of Forbes, 1840 (42), still remains as a valid genus, and so 
does not enter the synonymy, although certain forms originally included in 
it really belong to Glossodoris. 
The body is elongated and rectangular or almost square in transverse 
section. The smooth dorsum is an elongated oval, rounded in front and 
behind, and with its long sides approximatelj^ parallel. The mantle projects 
slightly all round and usually forms a frontal and caudal veil. The foot is 
large and continued backwards as a fairly long pointed tail. The sides of 
the body are vertical. The oral tentacles are small and conical ; the 
retractile rhinophores have a perfoliated clavus. The retractile branchise 
are composed of simply pinnate leaves. The armature of the labial disc is 
strong and composed of a number of densely-set small hooks bifid at the tip. 
The radula contains no rachidial teeth, but there are frequently thickenings 
which take their place. The lateral teeth are numerous and hook-shaped ; 
the first lateral tooth is denticulate on both sides, the rest denticulate only 
upon the external margin ; the outward teeth are smaller, and denticulate 
at the extremity. The penis is unarmed. 
Glossodoris resembles fairly closely in general appearance and shape 
Goniodoris, but the latter is phanerobranchiate. It is also much like Aphelo- 
doris, but differs in the presence of labial armature, of denticulate teeth, and 
simply pinnate branchise. 
Species Glossodoris westraliensis, sp. no v. (PL 27. figs. 8, 9 ; PI. 30. 
figs. 51-53.) 
Body. A coloured sketch by Professor Dakin from the living animal 
shows that its general shape was that of a typical Glossodorid, but the 
preserved specimens have shrunken considerably, more particularly in the 
tail-region. The notgeum is a fairly narrow, flat oval, equally rounded at each 
end and the sides almost parallel. In the preserved specimens it contracts 
considerably, becoming less rectangular and more arched. The sides of the 
body pass inwards to a moderately narrow foot and the mantle only projects 
a very short distance. 
Colour. From Professor Dakin's sketch the general body-colour appears 
to be a bright blue. The notseum is bordered by a narrow band, yellow on the 
inside and orange-red right at the margin. The rhinophores are orange-red 
and the branchise red. On the notseum inside the marginal line is a narrow 
band of blue and then a slightly wider band of deep purple, almost black. 
This deep band passes round in front and lateral to the rhinophores, and may 
or may not enlarge slightly to include the margin of their sheaths. At the 
posterior end it passes round more or less parallel with the margin and 
behind the branchise. In the middle of the notaeum the dark band enlarges. 
