199 
Bryozoa of the Bay of Nap/les. 
Hah. Seas of Europe. Other localities require confirmation. 
J have only a few pieces from Naples, occurring on seaweeds 
as small slightly raised patches about £ inch in diameter. It 
may, however, have been overlooked and be more common 
than this would indicate. 
74. Cellepora margaritacea , Pourt. (PI. XXIV. fig. 8-10.) 
Vmcularia margaritacea, Pourtales, Cont. to Fauna of the Gulf Stream, 
Bull. Mus. G'omp. Zool. Camb. U. S. no. 6, p. 110. 
Cellepora margaritacea, Smitt, Floridan Bryozoa, pt. ii. p. 53, pi. ix. 
figs. 187-192. 
Buskea nitida , Heller, Die Bry. des Adriat. Meeres, p. 89, pi. i. figs. 2, 3. 
Zoarium cylindrical, dividing dichotomously; zocecia in 
alternate rows round the axis, smooth. Peristome scarcely 
raised, one or two minute avicularia in the proximal edge of 
the peristome. The area of the ovicell is raised ; but the per¬ 
forated portion is often depressed ; 4-8 perforations. 
This has much in common with Cellepora ramulosa ; but 
should both have to be removed to another genus, the name 
given by Heller would have to be avoided, since Peuss named 
a fossil genus, allied to Defrancia , Bush'ia (Oberolig. p. 64). 
Alder called a Ctenostome Buslcia (Cat. of Zoopli. p. 156). 
We have the above Buskea ; and Hutton named a genus of 
New-Zealand Lepralioid forms similar to Lepralia discretely 
Buskia; besides which, I believe, the name has been used 
in other groups. As the shell is somewhat transparent, the 
shape of the two avicularian chambers which overlook the 
mouth can be readily seen. The space between these two 
avicularia often has the appearance of a sinus. 
Operculum (fig. 10) nearly oval, with slight sinal expansion 
at the proximal end. Width *084 millim., length *052, 
muscular dots ’048 millim. apart. 
Hab. Common in the Floridan seas (Sm.), Adriatic (20-35 
fathoms) ( Heller ). Sand Key, 100 fathoms ; Havana, 270 
fathoms {Pourt.). Naples, dredged from 40 fathoms, rare. 
Capri, about 100 fathoms. 
75. Retepora cellulosa } L. (PI. XV. figs. 1, 2.) 
This form is, I believe, the one which has usually been 
denominated cellulosa ; but I must confess to finding great diffi¬ 
culty with the genus Retepora , as the specific variations are 
very great. 
This species, which is the most common at Naples, has a 
very solid base, half an inch or more in thickness ; it then 
spreads out, sometimes almost horizontally, at others more 
funnel-shaped; and, as a rule, the foliations are thicker and 
