“Cribrimorph” Cretaceous Polyzoa. 389 
Bohemia. Non Lepralia pediculus, Reuss, 1874, Palaeonto- 
graphica, vol. xx. part il. p. 129, pl. xxiv. fig. 16; Turonian, 
ob. Planer ; Strehlen, Saxony. 
XI. Tricotpopora, gen. nov. 
Genotype. JT. trisinuata, sp. n. Type-specimen. British 
Museum, D. 28447 ; Coniacian ; St. Avertin, France. 
XII. Monocrratorora, gen. nov. 
Genotype. M. unicornis. 
Tabular Diagnoses of the Species. 
A. Apertural bar undifferentiated, cost about 18; 
apertures primitive (subsemicircular). 
I, Proximal apertural spines hardly thickened ; 
apertures less primitive ............000+-- M., lewestensis, 
II. Proximal apertural spines decidedly thick- 
ened ; apertures more primitive .......... M. gamblei. 
B.* Apertural bar with median process and flattened 
in a vertical plane; apertures about semi- 
GOTH CLS SS ee a ae M. unicornis. 
1. M. lewesiensis; sp. un. 
Type-specimen. British Museum, D. 28248 ; Holaster 
planus-zone; Malling Hill, Lewes, Sussex. 
2. M. gamblet, sp. n. 
Type-specimen. British Museum, D. 28530 ; Lower Seno- 
nian ; Chatham, Kent. 
3. M. unicornis, sp. n. 
Type-specimen. British Museum, D. 28247 ; coranguinum- 
zone; W. of Beachy Head, Sussex. 
XIII. Hygopora, gen. nov. 
Genotype. H. gibba, sp. un. Type-specimen. British 
Museum, D. 28493; Cenomanian, Korycaner Schichten ; 
Kank, Bohemia. 
XIV. Hrppiorora, gen. nov. 
Genotype. H. equestris, sp. nu. Type-specimen. British 
Museum, D. 28909 ; guadratus-zone, pillula-subzone ; North 
Lancing, Sussex. 
