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TEE ANNALS 
MAGAZINE OF NATURAL. HISTORY. 
(EIGHTH SERIBS.] 
No. 107. NOVEMBER 1916. 
XLVI.—A Revision of the “ Cribrimorph’’ Cretaceous 
Polyzoa. By W. D. Lane, M.A., F.Z.S. 
(Published by permission of the Trustees of the British Museum.) 
[Concluded from p. 112.1] 
B. Andrioporide, fam. nov. 
Uniserial and multiserial Cheilostome Polyzoa of small 
size (4-4 mm. in length), in which the intraterminal front 
wall is formed of cost which, arching over, fuse along the 
middle line and do not, as a rule, bend upwards and be- 
come free spines ; where this is the case, however, the free 
continuations of the cost are solid; lateral fusions may 
take place between the cost, and costal fusion may be so 
complete that the boundaries between the coste may nearly 
or quite vanish ; very little secondary tissue is developed 
between the cecia or in connection with the apertures ; 
avicularia are minute, primitively blunt, secondarily pointed ; 
apertural spines, if present, six in number, sometimes 
thickened, but never so in connection with secondary tissue ; 
no fusions take place between outgrowths of the apertural 
bar and the apertural spines. 
Tabular Diagnoses of the Subfamilies. 
A. Costz are not specially flattened, and bear 
neither a median row of pores nor a median 
slit; nor do they occasionally fuse with 
Ann. & May. N. Hist. Ser. 8. -Vol. xviii. 26 
