106 
South JustraUan Shells. 
S.A. XAT., VOL. XIV 
May, 1931 
suiToundiiig the tubular anus in horseshoe shape, the posterior 
portion being bare, they arc retractile ^vith the anus into a 
common cavity, colour rich reddish-yellow. Length 111, breadth 
2S, height 31 mm. At low water, Port Noarlunga, and Salt 
Creek Bay (Yorke Peninsula). Dredged Cmlf St. Vincent, and 
Antechamber Bay (Kangaroo Island), 20 fathoms. Also West- 
ern Australia. Appears fairly plentiful in Gulf St. Vincent, 
'i'hougli spccirically identical, the littoral sj ecimens are nowhere 
nearly as large as the deep water forms. (Type localitt — Aus- 
tralia). The difference between C. hrevicmidatum and C. ob- 
longnm appears to be merely a matter of preservation, as from 
the same dredging some individuals shrunk to the shape of ob- 
longiim and others assumed in contraction the form of brevicaud- 
atu m. 
C. adelaidae. Basedow & Hcdley 1905. PI. 3, figs. 9, 10, 
Animal small, ilaltcncd on top, elongate, a little wider 
at the head, terminating in a small tall; mantle sparingly 
developed; foot rounded in front, altenuatcd behii'id, pro- 
jecting to no considerable extent beyond the mantle; 
white underneath, scantily spotted with light lilac along the sides; 
dorsal surface mostly pale buff, bordered on either side by about 
eight somewhat regularly spaced deep reddish-violet spots, which 
are surrounded each by a whitish space, the interspaces between 
these spots being of a sonieM-hat deeper shade of brown than the 
rest; dorsal tentacles club shaped, orange-red, obliquely laminated; 
branchial plumes coherent at their base, about six, non-retractile, 
of the same tint as the rhinophorcs. Length 8, breadth 3 mm. 
■\t low water, Marino Rocks, South Australia (type locality) also 
Edithburgh. Appears to li\'e on the under side of rocks covered 
by seaweed, and partially buried in soft mud. 
DORIOPSIDAE (= Doridopsidae). 
rile members of this family simulate the true Dovldida^y but 
mav be recognised by the poriform mouth and the very small 
adherent oral tentacles. The form is mostly plump, not elongated, 
the dorsal surface smooth or tuberculate. Mamie edge rather 
broad, wavy, covering the head and sometimes tlie tail. Pockets 
of the rhinophorcs mostly with a smooth margin, the rhinophorcs 
completclv retractile, usualh' with twenty-five or thirty-five lam- 
ellae. Branchiae arranged in a circle round tlie anus, situated 
on the dorsal surface above the mantle border, their num- 
ber varying from four to eight tri- or quadri-pinnate. Jaw and 
radula arc wanting, the pharynx being suctorial. Genital pore 
on the right anterior side. Distribution — Alosib tiopical and 
subtropical, d'he absence of a radula justified family rank. 
Doriopsis. Pease I860 (= Doridopsis Alder & Hancock 
