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 fragiUs (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 tul^ercular 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 (1 = D. aurita, 

 Hesse), has deeply lobed rhinophore sheaths, but apparently no ridges on the veil. 



Provisioi>ally this form may be registered as Doto antdrctica, Ijut it does not 

 ditler materially from the Dotos of the North Atlantic, unless indeed jaws are really 

 absent. 



NOTAEOLIDIA (Eliot). 



Eliot, Nudibranchiata of the Scottish National Antarctic Expedition ; Trans. Royal See. of Edinburgh, 

 XLI., Part III. (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 Aeolididfe and forms like 

 Dendroiiotus 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 follieulate 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. NOT^OLIDIA DEPRESSA (Figs. H AND I). 



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 papillae. 

 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 

 papillce, accompanied in a few places by very small ones underneath. The majority 

 of these papillte or cerata are about 1-5 mm. high, but some are still smaller; 

 and on each side there are aljout fifteen larger ones, 5 to 8 mm. high, set at 



