37 
Bryozoa of the Bay of Naples. 
the side of the oral aperture ; sometimes this is absent ; and in 
other cases there is one on each side. 
Heller has figured two vibracular processes, but does not 
mention them in his text; but I think, in spite of this diffe¬ 
rence, there is no doubt this is L. cribrosa. 
I have figured terminal cells in order to show the structure 
of the connecting furrows. Before these are covered by the 
growth of the zooecia they appear like ridges of pustules 
connected with the zooecia on each side. The cells of most 
Diachores are connected by long distinct tubes ; but in Dia- 
choris patellaria , var. (PI. XIII. fig. 4*), they are sometimes 
quite short, and in many specimens can only be seen when 
dissected ; also in Lepralia Brongniartii , Aud., the zooecia 
are connected by short tubes, as is well shown in Savigny’s 
figure, and which form the u reticulated spaces” of Busk ; and 
L. cribrosa shows another variation in this mode of connexion. 
There are several Lepr alios with similar rows of minute 
chambers between the zooecia ; and I think a study of the basal 
connexion would throw much light on the specific variation 
in the growth of the Bryozoa. 
Loc. Lesina, on Algae [Heller) ; Naples, on seaweed at 
slight depth. 
15. Lepralia verrucosa , Esper. 
Cellepora Endlicheri , Reuss, Foss, l’olyp. d. Wiener Tertiarbeckens, 
p. 82, pi. ix. fig. 27. 
Lepralia Endlicheri , Reuss, Die Bryozoen des Oest.-Ung. Mioc. p. 31, 
pi. i. fig. 9. 
Cellepora scarabeus, Reuss, F. Polyp, p. 8(5, pi. x. fig. 14. 
Lepralia scarabeus, Reuss, Br. Oest.-Ung. Mioc. p. 32, pi. i. fig. 10. 
I am unable to see in the later figures of Reuss any 
material difference from recent L. verrucosa. 
Loc. Miocene, Pliocene, Pruma (Calabria, A. TP.). Living: 
Arctic Ocean ( Sm .), Britain. 
16. Lepralia linearis , var. biaperta. (PI. XI. figs. 1, 2.) 
Hippothoa biaperta, Smitt, Floridan Bryozoa, Hand! Kongl. Svenska 
Vetensk. Ak. 1872, vol. ii. pt. 2, p. 46, pi. viii. figs. 173-176. 
Escharella linearis, Hass., forma biaperta, Busk, in Smitt, Krit. Fort, 
p. 14, 1867. 
This form varies very much in its different stages; so that 
on the one piece I have from Naples the youngest cells most 
nearly correspond with linearis typica, having raised avicu- 
laria on each side of a ventricose ceil, in a later stage the cells 
are the same as fig. 176 of Smitt, while in the oldest the aper- 
* This Plate will appear in a future number. 
