Bryozoa of the Bay of Naples. 
39 
20. Lepralia errata , stadium Hemeschara. (PL X. fig. 5.) 
Lepralia spinifera, Joknst. in Busk (part.), B.M. Cat. pi. xci. figs. 1,2. 
Under spinifera Busk has described widely different forms. 
The specimen in the British Museum, from which pi. lxxvi. 
figs. 2 & 3 is taken, is spinifera of Johnston, and has a large 
sinus, and the operculum (as far as could be seen without a 
preparation) nearly corresponds with that of L. Cecilii ; while 
pi. xci. figs. 1, 2, appears the same as the one under considera¬ 
tion, which has a circular distal and proximal edge and distinct 
muscular impression. 
Smitt has already separated some of Busk’s forms of 
spinifera , but does not seem to have found the present. 
Cells rhomboid, separated by divisional lines, coarsely 
punctured ; mouth suborbicular; the proximal arc of the oper¬ 
culum, being smaller, gives the appearance of a large wide 
sinus; often an umbo below the mouth, an acute aviculariurn on 
one side; ovicells-? Zoarium at the base with three or 
four layers, one over the other; from the incrusting base little 
stalked cups spring up. In the British Museum there is a 
piece, about 2 inches high, in which these cups are prolonged 
into long anastomosing tubes 4 millims. in diameter. 
I do not see any difference in the Naples, Cape-of-Good- 
Hope, and Australian specimens, but have not yet had the 
opportunity of detail-examination of the latter. 
Unfortunately the detail of this drawing does not appear, 
as it was transferred to the stone after the others, and appa¬ 
rently sufficient pressure was not given. 
21. Lepralia arrogata , sp. nov. (PI. VIII. fig. 1.) 
Zooecia quincuncially arranged, ovate-rhombic; surface 
with pores and tubercles-; aperture suborbicular, with a wide 
sinus ; large acute aviculariurn nearly covers the front of the 
cell. Ovicell raised on the proximal half of each cell, with 
a flat, depressed, perforate space, bounded by an annular row 
of large tubercles. 
The ovicells are very peculiar, and approach very closely 
to those of Lepralia cheilostomata , Manz. (third contribution), 
from the Pliocene of Castellarquato. Although the ovicells 
seem separated off and to belong to the zooecia above and on 
which they are situated, this is not the case, and they of 
course belong to the proximal zooecia. From this appear¬ 
ance the name is chosen. 
The operculum (6*) is 0J25 millim. long, 0T25 millim. 
wide ; the distal end is circular, the proximal triangular hinges 
very long (004 millim.) and narrow, with the muscles nearer 
the distal end. 
