Pleurophyllidia, 1 (probably
PI. undulata).
Eermsea, 1.
Alderia, 1.
Elysia, 1.
Doris verrucosa.
Geitodoris complanata.
Gadlina, 1.
Acanthodoris pilosa, and about
three other uncertain species.
Lamellidoris bilamellata, • and about
four other uncertain species.
Adalaria, 1.
Issa, 2.
Polio, 1.
Polycerella, 1.
Idalia, 1.
Ancula, 1 or 2.
Eeterodoris, 1.
Doridella, 2 (probably = Oorambe).
Here as in the north-eastern Atlantic, the Cladohepatica (about thirty) are more
numerous than the Holohepatica (about twenty), and among the latter thePhanerobranchiata
are greatly in the majority. I have not found any record of the occurrence of D. tuber-
culata, but it is not likely that it is entirely absent.1 All of the above genera are represented
on this side with the exception of Polycei'ella and the little-known Eet&rodoris from
deep water.
From various parts of the semi-tropical Atlantic, such as the Azores, the Sargasso
Sea, Madeira, the coast of Morocco, and the Canaries, are recorded the following as well
as some less certain forms : Discodoins, 2.
Gratena and Guthona, 2 sp. Platydoris, 1 or more.
Spurilla, 1. Aldisa, 1.
Fiona, 1. Ghromodoris, 1.
Glaucus, 2. Euplocamus, 1.
Scyllsea, 1. Plocamopherus, 1 r~
Phylliroe, 1. Doridopsis;!.
DotiLla, 1. Doriopsilla, 1.
Doris verrucosa. Phyllidiopsis, 1.
The above list is perhaps not very representative, as it is to some extent the result
of pelagic collecting, and hence contains an undue proportion of forms which swim or
live on floating seaweed. But even so, the Cladohepatica are no longer in the majority
as in more northern latitudes.
The records from the Mediterranean are ample, but they refer almost entirely to
Marseilles, Naples, and the Adriatic, so that we can say nothing about the fauna of the
eastern and southern portions. The following is a rough analysis of the genera based
chiefly on the works of Bergh, Trinchese, and Vayssikre. Some Mediterranean naturalists
have shown a tendency to create superfluous species (e. g. in Doto and Manonia), and the
numbers given here are only approximate :
AEolidiella, Spurilla, etc., 5. *Gapellinia, 2.
*Hei-via and Bizzolia, 2. Amphorina, 2.
Galvina, 2 Goryphella, 5.
1 Mr. F. N. Bulch, of Boston, Mass., who has most kindly given me some information on this
point, agrees that there is no certain record of the occurrence of this species on the Atlantic coast of
the United States, but thinks that D. diademata, though wrongly described as phanerobrancliiate,
is really identical with it or at least nearly allied.
VARIATION AND DISTRIBUTION. 9
Favorinus, 2. * Ghromodoris, 11.
*Flabellina, 2. *Doridopsis, 2..
Facelina, 10. * Doriopsilla, 1.
Forestia (= Galma), 1. Fiona, 1.
Other HSolids, 5. Doto, about 10 described.
* Glaucus, 1. *Tethys, 1.
Antiopella, 1. Lomanotus, 2.
*Madrella, 1. Eancoclcia, 2.
Eero, 1. Scyllsea, 1.
Pleu/rophyllidia, 2. * Phylliroe, 1.
Tritonia, 5 mentioned. Elysia, 2.
*Marionia, 8 „ Hermsea, 2.
Doris, 3. *Ercolama, 2.
* Discodoris, 3. Limapontia, 1.
* Platydoris, 2. Polycera, 2.
Aldisa berghi. *Greilada, 1.
*Peltodoris, j ||||||| Triopa, 1.
*Pa/radoris, 1. AEgires, 2.
*Baptodoris, 1. Goniodoris, 2.
Thordisa, 1. Idalia, 1.
Gadlina, 1. * Euplocamus, 1.
Rosta/nga, 2. *Drepania, 2.
Jory/ivha, 2. Lamellidoris grseffei.
The genera marked with an asterisk are not recorded from the British Coast.
The Mediterranean fauna is richer than that of the northern Atlantic, for nearly all
groups are well represented. The northern genera AEolidia, Dend/ronotus, Lamellidoris,x
Acanthodoris, and Adalaria are not recorded, but new Cladohepatic forms, such as Fldbel-
lina and Tetfoys, make their appearance. Nearly all the northern genera of Crypto-
branchiate Dorids remain, and are supplemented by Discodoris, Platydoris, and allied forms.
Probably the fauna is even more comprehensive than it seems, for while the presence
of new species is certain, the absence of northern forms may prove to be incorrect.
A considerable number of specifes from Bermuda have received names, but the
descriptions are slight and do not always accord with the genera to which the specimens
are assigned. But it would appear that at this point (about 32° N.) the northern fauna
is considerably modified by the addition of many brightly coloured Doridid« and
ElysiidaB.
The fauna of the tropical Atlantic is known by small collections from the Cape
Verde Islands (about 20° N.), the West Indies (mostly from between 15° N. and 20° N.),
and the province of Alagoas in Brazil (about 10° S.). On the African side no specimens
from the equatorial Atlantic have been examined.
The following list tabulates the results obtained:—»■
L. grxffei is a somewhat uncertain form.