OPISTHOBRANCHIATA FKOM THE ABIIOLHOS ISLANDS. 549 
Mr. E. Asliby, who is familiar with this form on the coast of South Australia^ 
informs me that they are usually of the smaller size. It has not been 
recorded previously from West Australia. 
Some confusion exists in regard to the nomenclature of the members of 
this genus, which deserves comment. 
The following forms have been recorded : — 
A. (^Doris) lanuginata Abraham, Proc. Zool. Soc. Lond. p. 255, 
pi. xxix. figs. 15-17 (1877). 
A. marmorata Bergh, Malak. Unters. vi., Semper's Reisen, 1904, p. 42. 
A.marmorata Bergh («z'c), Basedow & Hedley, Traus. Roy. Soc. South 
Australia, vol. xxix. p. 152 (1905). 
A. lanuginata Abr., Eliot, Proc. Malac. Soc. Lond. p. 333 (1907). 
A. hedleyi mihi, described above. 
The original specimen described by Abraham is in the British Museum ; 
it is not well enough preserved for detailed examination and the pharyngeal 
complex is removed. Eliot (98, p. 333) states that, on comparing this 
specimen with that sent hj Suter from New Zealand, he has no doubt that 
they are identical. He gives the genus as containing two species {A. 
lanuginata Abr. and A. marmorata Bergh), but lower down on the same page 
he gives A. marmorata as a synonym of ^i. lanuginata, axul on p. 335 he states 
that Bergh's A. marmorata is perhaps a distinct species. Further, he 
suggests that it is not clear that the animal figured by Basedow and Hedley is 
either of the two species. On comparing the descrij^tions we find : — 
A. LANUGINATA (Abr.). — Oolour preserved "greenish-grey, blackish 
mottlings " (Eliot). In the specimens in the British Museum the 
mottlings are uniformly dark areas (O'lK) . ('olour in life " dirty red, 
numerous white pustules" {Suter) ^ but the applicabilitj' of this to the 
specimen is doubtful. 
A weak labial armature. Tentacles long, flat, furrowed on upper 
surface, and almost auriculate. Rhinophores much closer together 
in large specimens of A. hedleyi than in the far smaller original 
specimen of ^1. lanuginata. Size 50 mm. long, 33 mm. broad, 
16 mm. high. Radula 26 rows, (40-45) . . (40-45). 1st and 2nd teeth 
characteristic, unlike A. marmorata or hedleyi. 
A. MAEMOEATA Bergh. — Colour preserved "von hell gelblichweisser Farbe, 
die von zahlreichen kleineren und (bis 3 mm. diam.) grossereu hell 
aschegrau, verschwimmindeu, unregmassigen Flecken unterbrocken 
war" (no mention of spots being ring-shaped, which would have 
hardly escaped Bergh's acute eye). 
Labial armature not mentioned. Tentacles 1*5 mm long, "finger- 
formig." Size 45 mm. long, 25 mm. broad, 13 mm. high. Radula 
34-35 rows, (40-42) . . (40-42). 1st and 2nd teeth like remainder, 
outer teeth denticulate and not quite same shajje as A. hedleyi. 
