20 SIR CHARLES ELIOT. 
They bear three to four distinct lateral denticles, the highest of which are on the sides 
of the central cusp. 
This species is nearly allied to Doto fragilis (Forbes), which has ridges on the 
frontal veil and no dark spots. But the cerata are fewer, and bear fewer tubercles, 
there are no traces of tubercular spots on the back, and the rims of the rhinophore 
sheaths are much more deeply and distinctly lobed than in D. fragilis. These 
characters, however, are all rather slight, and on examination of several specimens 
would probably show considerable variation. Doto aurea Trinchese (? = D. aurita, 
Hesse), has deeply lobed rhinophore sheaths, but apparently no ridges on the veil. 
Provisionally this form may be registered as Doto antarctica, but it does not 
differ materially from the Dotos of the North Atlantic, unless indeed jaws are really 
absent. 
NOTAEOLIDIA (Exior). 
Eliot, Nudibranchiata of the Scottish National Antarctic Expedition ; Trans. Royal Soc. of Edinburgh, 
XLL., Part IIT. (1905), p. 520. 
THis genus, which was created by me for a number of specimens collected by 
the Scottish Antarctic Expedition from the South Orkneys, seems characteristic of 
Antarctic waters. It is intermediate between the Aeolidide and forms like 
Dendronotus and Lomanotus. Like the true Aeolids, it has non-retractile perfoliate 
rhinophores without sheaths, large oral tentacles, but no frontal veil, and numerous 
cerata, but the radula consists of a few rows each containing nine or eleven teeth, 
and the liver is a folliculate mass, partly lying within the body cavity and partly 
forming a layer within the body walls, from which branches pass into the cerata. The 
species are :— 
1. Notaeolidia gigas Eliot. 
2. N. purpurea Eliot. 
3. N. depressa. Sp. nov. 
N. gigas and N. purpurea superficially resemble Aeolids. In the present species the 
resemblance is less striking, as the animal is relatively broader, flatter and furnished 
with only a single row of cerata. The radula is specifically distinct. 
7. NorHouipia DEPRESSA (Figs. H anp 1). 
OnE specimen from McMurdo Bay, dredged in 4 to 10 fathoms, and, as 
preserved, of a uniform, orange yellow, with a little white pigment on the papille. 
It measures 47°5 mm. in length, 16 in breadth, and 12 in height, but has a 
flattened and depressed appearance, owing to the sides of the back being produced, 
much as in Lomanotus, into expanded margins, which bear a single row of conical 
papillae, accompanied in a few places by very small ones underneath. The majority 
of these papille or cerata are about 1°5 mm. high, but some are still smaller ; 
and on each side there are about fifteen larger ones, 5 to 8 mm. high, set at 
