125 
Bryozoa of the Bay of Naples. 
this latter distinction might be used. The shape of the 
cells and the aperture, however, seems in both to be the 
same. 
There also does not appear to be sufficient reason for sepa¬ 
rating hidentata , as the raised projection at the side of the 
mouth is very variable and depends to a great extent upon 
the age. In the younger cells it is much more apparent, 
while in the older cells, where the aperture is more surrounded 
by a subsequent growth, it is scarcely seen. The specimen 
figured would be hidentata of M.-Edw., stadium anyustifolia, 
Moll; but as this is only a variable difference in the peri¬ 
stome, and not in the oral aperture, there does not seem valid 
reason for making it even a variety. 
I have before (p. 33) called attention to the long spatulate 
avicularia which are often seen in this species; and the diffe¬ 
rent stages, from the very small avicularium with the small 
mandible placed at right angles to the axis of the zooecium, to 
the large spatulate horizontal avicularium, can be seen in the 
same piece. 
The operculum is somewhat saddle-shaped, about 0T2 
millim. wide and about OTGmillim. long, with large muscular 
bosses at the side. 
Four lateral rosette-plates and two distal, divided by a large 
ridge running up between them ; they are situated at the 
base of the lateral wall. 
Loc. Pliocene: Castrocaro, Leghorn, Sicily, Rhodes. Liv¬ 
ing: Britain, France (zone prof.), Adriatic; Naples, 30-40 
fathoms. 
I have two specimens in which, at the end, the two layers 
separate and end in a funnel-shaped expansion. This is in¬ 
teresting as showing a connexion between the Hemeschara 
and Eschara stadia. 
60. Eschara verrucosa , Peach. (PI. XII. figs. 2, 3, 4.) 
Eschara verrucosa , Peach, On a new British Eschara, Royal Inst, of 
Cornwall, vol. iii. 1868, p. 116, and vol. iv. pi. with p. 88. 
Eschara lunar is, Waters, Bry. from the Plioc. of Bruccoli, Tr. Manch. 
Geol. Soc. vol. xiv. 1878, p. 475, tig-. 9. 
Stem cylindrical, dividing dichotomously, six cells in a row ; 
cells at the growing extremity ovate, near the base hexagonal; 
mouth orbicular, young cells projecting, old cells deeply im¬ 
mersed, four oral spines on the upper margin of the aperture; 
proximal edge of operculum straight, distal edge horseshoe¬ 
shaped ; border of the oral aperture sometimes raised in young 
cells; semilunar pore below the mouth ; avicularium on one 
side of the cell, with extremely long mandible, surface coarsely 
