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DORIDOPSIDAS—POLYCERIDA. 37 
Famity DORIDOPSID&. 
Doris-like Mollusca, without well-developed spicula in.the in- 
teyument, with mouth suctorial, opening on the front margin of 
the foot, witha retractile proboscis, but destitute of odontophore, 
jaws, or spinous collar, 
The absence of an odontophore, so generally possessed by the 
cephalophorous Mollusca, justified Messrs. Alder and Hancock 
in raising this group to the rank of a family. 
Dorivopsts, Ald. and Hane., 1864. 
Syn.—Doriopsis, Pease, 1860. Rhaeodoris, Mirch, 1863 (part). 
Haustellodoris, Pease, 1871. 
Distr.—72 sp. Universal. D. viridis, Pease (xc, 100”. 
Body more or less depressed, ovate or elliptical. Mantle 
ample, covering the head and foot, smooth or with soft tubercles 
and without marginal appendages. Rhinophores laminated and 
retractile within cavities. Head indistinct, generally with two 
small lateral lobes, but without proper oral tentacles. Branchiz 
generally ramose, retractile with the anus into a common 
cavity. 
DORIOPSELLA, Bergh. Distinct from Doridopsis by its some- 
what rigid and granulated mantle. D. areolata, Bergh. 
Famity POLYCERID-. 
Mantle small or obsolete, generally with marginal appendages, 
integument usually spiculose. Rhinophores various, often lami- 
nated. Messrs. Alder and Hancock divide the Polyceride into: 
two sections, according as the rhinophores are retractile or non- 
retractile. This gives a convenient arrangement. 
‘§ A. Rhinophores retractile within ee the odontophore 
broad. (Huryglosse.) 
Mramira, Bergh, 1874. 
Distr.—_M. nobilis, Bergh. Australasia. 
Mantle (nothzeum) anteriorly produced into a frontal veil, and 
furnished with lateral flattened lobes, lamellate below, behind 
continued into a caudal veil, above keeled and with transverse 
ribs. Oralaperture armed with a spinous buccal collar. Odon- 
tophore broad, with numerous series of teeth, many of them 
multidentate ; the rachis armed.—BERGH. 
CasELLA, H. and A. Ad. 
Distr.—2 sp. Australasia. C, Gouldi#i, H. and A. Ad. 
(xc;2). 
Body compressed, elongated. Mantle-margin small, forming 
undulated lobate or erect crests along the sides of the back. 
