28 
Mr. A. W. Waters on the 
III.— On the Bryozoa [Poly zoo) of the Bay of Naples. 
By Arthur Wm. Waters, F.L.S., F.G.S. 
[Plates VIII.-XI.] 
The Bryozoa from the Mediterranean have received some 
little attention from time to time; but very much remains to be 
done, and on this account I made a collection during a few 
weeks’ stay in the Zoological Station at Naples. My atten¬ 
tion was specially given to the calcareous species, in order to 
compare the recent forms with the abundant Pliocene and 
Miocene faunas of Italy. 
Marsigli (1725), G. Olivi (1792), St. delle Chiaje (1843, 
in Descr. e Notom. d. Anim.), and Costa (Fauna del Regno di 
Napoli) have given descriptions of a few species; but as the 
early conceptions of the Bryozoa were crude, these works are 
of little assistance. 
In 1810 the ‘ Description de l’Egypte ’ was published, and 
a series of folio plates of the Bryozoa were prepared under the 
direction of J. C. Savigny ; but as soon as these were com¬ 
pleted a serious and ultimately fatal illness prevented him 
writing the description, or, in fact, being consulted as to what 
had been done; and it became necessary for the French 
government to insist on the work being brought to a conclu¬ 
sion, and M. Audouin was intrusted with the completion of 
the 11 Polypes.” He gave a name to each of the figured 
forms, but no description ; so that his work is only a catalogue 
of species named after some member of the expedition, or 
friends and a few French savants. It will thus be seen that 
a difficulty in nomenclature is introduced, as the figures fre¬ 
quently do not admit of determination, since the characters 
which are now used were not understood, and artistic fancy 
was allowed rather free scope; however the name given should 
be retained for those species which are clearly distin¬ 
guishable. 
In 1867 Prof. Cam. Heller published his 1 Bryozoen des 
Adriatischen Meeres’ (in Verb, der k.-k. zool.-bot. Gesellsch. 
Wien, tom. xvii.), which is a part of his series on the Adri¬ 
atic zoology; and this will always be a most useful and im¬ 
portant guide to the Mediterranean Bryozoa. And although 
I have ventured to make one or two changes, as in the case 
of Lepralia perugiana and L. Steindachneri , such alterations 
are only to be expected, especially when it is remembered that 
this is only one group out of many studied by Prof. Heller; 
and in the two cases mentioned I have perhaps had the op¬ 
portunity of consulting more material than was available for 
Prof. Heller. 
A number of papers by Reuss on the Eocene and Miocene, 
