MELICEEITITES. 
339 
DlilEXSIONS. 
B.M., D.4520. 
Diameter of branch 
Diameter of zooecia 
Diameter of aperture . . . 
1’7 mm. 
External length of avicnlarium 
Distetbutiox. 
British : 
Upper Chalk : Dover. 
Middle Chalk : Chatham. 
Foreign : 
Senonian — Campanian : Riigen. 
Figuees. 
PL XYI. Fig. 1. Part of a zoarium with a spatulate 
aTicularium, X 28 dia. Miiddle Chalk: Chatham. Gamble Coll. 
D. 4116. 
PI. XVI. Fig. 2. Part of a zoarium with a longer avicnlarium, 
X 14 dia. Chalk: Dover. Bowerbank Coll. D.4520. 
Affinities. 
This Bryozoan has the aspect that would he presented by thick 
specimens of M. lonsdalei so weathered that the peristomes have 
been lowered and the interzooecial sutures rendered prominent. 
The branches, however, are thicker, the avicularia longer, and 
the apertures slightly more distant than in M. lonsdalei. 
In the hexagonal form of the zooecia it resembles M. ornata 
(Orb.), hut that ‘species’ has the peristome depressed below the 
general surface of the zoarium, and not raised above it, and has 
tubercles. 
By the thickness of the branches and their blunt terminations 
M. propinqua approaches M. gracilis ; but it differs by the absence 
of tubercles, and the tubular, subcircular peristomes. 
LIST OF SPECIMENS. 
British. 
D. 4520. Several branches on a block of chalk. Upper Chalk. Dover. 
Bowerbank Coll. Figd. PI. XVI. Fig. 2. 
JD. 4116. A specimen (on flint). Middle Chalk. Chatham. Gamble Coll. 
Figd. PI. XVI. Fig. 1. 
