108 
South Justrahan Shells. 
S.A. NAT., VOL. XIV 
M.vv, 1933., 
POLYCERIDAE. 
Animal with mantle small or obsolete, generally with margin- 
al appendages, integument usually spiculose; rhinophores various, 
often laminated. Alder & Hancock divide the Polyceridae Into 
two sections according as the rhinophores are retractile or non- 
retractile. Distribution — All seas. 
Nembrotha. Bergh 1877. Small, slug-like, smooth, rather 
raised in central region; without definite dorsal margin between 
back and sides; bod\' without dorsal and frontal appendages; 
foot narrow, elongated Into a narrow tail behind, bluntly rounded 
at front end; rhinophores retractile; branchiae non-retractile. 
three to five, strong, stout, situated about the centre of the dorsal 
surface and almost surrounding the anus; oral tentacles small; 
radula narrow; jaws usually absent; hermaphrodite gland spread 
over liver. Recorded chiefly from Indo-Pacific region, between 
tides under stones. T\'pe, designated by O'Donoghue — Nem- 
brotha ingerrima Bereh. Possibl)- Ne?nbrotha may be only a 
sy nonym of Angasiella Angas & Crosse 1864. 
N. Verconis. Basedotv Sc Hedley 1005. PI. 5, figs. 1, 2,. 
and PL 4, fig. 16 '’A'ercoA Xembrorlia.” Animal large, linear, 
oblong, swollen in centre, tapering beliind: lemon-yellow, with 
large disconnected blunt tubercles of deep prussian blue some- 
what parallel to the dge of the foot; skin delicate, peeling off 
easily on abrasion, wrinkled; cloak almost cntlrel}' .jvanting; 
frontal margin (veil) small, deep' prussian blue, of three semi- 
circular dilations, the two lateral of which arch laterally around 
the dorsal tentacles on cither side, then gradually fading to nil 
posterior to them; foot is square in front, dilated outwardly at 
anterior end, sides slightly frilled, approximately parallel, passing: 
posteriorly to a bluntish point, colour light sea-blue, with a deep 
blue border; liver visible as a faint brown patch In the centre; 
dorsal tentacles sub-clavate, tapering, laminated, about thirty 
slight!}' opaque laminae, non-retractile, deep prussian blue, with 
yellow stalk: eyes not visible; genital aperture prominent, at 
about the anterior fourth, lighter (greenish) blue than the tuber- 
cles; branchial plumes five, tripinnate, almost completely sur- 
rounding the anus, dark yellow at base, passing into rich blue 
along the stems and delicately fringed with small purple tufts. 
Length 55, breadth 12mm. Dredged — 20 fathoms, off Xewland 
Head. Backstairs Passage. The indications of the ^:cistence of 
a cloak are almost entirely wanting, beyond the slight continua- 
tion of the frontal margin past the dorsal tentacles and the some- 
what linear arrangement of the tubercles.: This species is 
clearly separated from co-generic forms by its vivid primrose 
colour. 
