Genus 1. Fiona Alder & H ancock.
See Bergli 1; 18, pp. 141—144 ;j 49, pp. 6—8.
The general shape is asolidiform, but the dorsal margin forms a rudimentary flap.
Foot rounded in front. Oral tentacles set far back; rhinophores smooth. Cerata
numerous, not arranged m rows, and each furnished with a lateral gill-membrane. Anus
dextro-dorsal. No cnidocysts. Jaws denticulate. Radula uniseriate; teeth horse-shoe
shaped.
1. Fiona marina (Forskal).
= F. nobilis Hancock & E mbleton.
==: F . atlantica Bergh.
(Pt. 7, Fam. 3, PL 38 a.)
The above, which appears to be the correct specific name,is based,on the identification
of the animal with the Umax marinus of Forskal.
Family VIII. DOTONIDiE.
Small animals agreeing with the jEolididae in most points except that the rhino-
phores are protected by projecting sheaths. The cerata are stout and tuberculate.
Genus 1. Doto Oken.
See Bergh 11, pp. 2 4 -3 0 ; 14, pp. 695-698; Vayeeière 2, pp. 99-106 ; Eliot, 1, pp. 356-357.
Rhinophores smooth (except in D. erassicornis) with large cup-like sheaths. Cerata
arranged m a single row on either side of the. back ; clavate and studded with papillæ or
knobs. An oral veil over the mouth with short tentacular prolongations. Jaws smooth.
Radula a long row of small horse-shoe shaped teeth, bearing a few denticles or ridges.
In M o the radula is uniseriate, but in the allied M illa there are four to five minute
lateral teeth. Genitalia not armed. In the doubtful Gellma affinis (see Tergipes * ■
m D Orbigny, Nudibranches des Côtes de France, Mgz. de ZoôJ,, vii, 1837, pp. j, 5)
recorded from Rochelle the cerata are said to be simple and smooth.
A great number of species have been described, but the genus requires revision
based on the study of a large series of living animals. The anatomical characters offer
hardly any points of difference, and the external features, such as the coloration and
shape of the rhmophore sheaths, are very variable. 1
1. D. coronata (Gmelin).
(Pt. 2, Pam. 3, PI. 6.)V< s
Proba,b]ygg Hesse’s D. armoricaim, D. amflums, and V. firmigam.
2. Doto fragilis (Forbes).
(Pt. 5, Pam. 3, PL J p
Possibly = D. anlarctica Eliot.
3. D. pinnatifida (Montagu).
(Pt. 7, Fam. 3, PI. 45.)
Probably = D. splendida Trinch. and D. onusta Hesse.
4. D. cuspidata A. & H., 1862.
(Pt. 8, PI. F, figs. 1—3.)
5. D. cinerea Trinchese.
$|I[6. D. erassicornis M. S ars.
Norway. M. Sars, Om Cbristianiafjordens Fauna, in Nyt Mag. fur
Naturvidenskabene, Christiania, 1870, p. 193.
Luteo-fusca ; velo semilunari ; tentaculis oylindro-conicis, crassis, transverse sulcatis,
e vaginis brevibus, tubæformibus, margine sinuato aut crenulato, baud expanso, pro-
deuntibus ; brancbiis utrinque 6, ovato-conicis, crassis, non pedicellatis, papillis luteo-
albidis immaculatis, in circulis 3 transversis dispositis. Habitat in freto Drobachiensi :
50—60 fathoms. Length 5—6 mm.
Sars’ plate xii, figs. 1—6, represents an animal with small low cerata and thick
rhinophores bearing circular lamellations. It is stouter than most species of Doto. The
characters, if established, seem to constitute a valid species.]
Family IX. jEOLIDID.®.
Limaciform animals bearing unbranched cerata on the dorsal surface. The liver is
represented by the diverticula which these cerata contain, and does not, as in Dend.ronotidse,
etc., form masses in the body-cavity. Rhinophores simple or perfoliate, but never with
sheaths. Radula uniseriate or triseriate. Cnidocysts usually present.
a. TRISERIATAE.
Each transverse row of the radula contains three teeth.
[Gonieolis M. Sars and Ghlamylla Bergh are two genera comprising four species, mostly
known by single specimens. Odhner maintains that the true Gonieolis of M. Sars is not
an iEolid and has no hepatic diverticula in the cerata. He considers that Ghlamylla
should be made to include Gonieolis Bergh, which is not the same as Gonieolis M. Sars.
The genus Ghlamylla thus constituted is allied to Goryphella and Gumanotus. The animals
are rather large, with head shields and projecting dorsal margins, large rhinophores and
tentacles and numerous cerata which are often small. They were all found in the North
Atlantic and may occur in the British area. An examination of further specimens seems
desirable before the place of these forms is fixed. See Bergh 24 and 54; Odhner 1.]