“Cribrimorph”’ Cretaceous Polyzoa. 399 
2. R. larvalis, sp. n. 
Type-specimen. British Museum, D. 23466; Coniacian ; 
Fécamp, France. 
3. R. bidens, sp. n. 
Type-specimen. British Museum, D. 28539; Lower 
Senonian ; Chatham, Kent. 
4. ?R. [Escharipora| incrassata (d’Orbigny), Pal. France. 
1851, pl. 685. figs. 1-4, 1852, p. 223; Senonian ; 
Meudon, France. 
5. FR. vallata, sp. n. 
Type-specimen. British Museum, D. 28302; cortestudi- 
narium-zone ; Lewes, Sussex. 
6. R. suta; sp. n. 
Type-specimen. British Museum, D. 4225; Lower Seno- 
nian ; Chatham, Kent. 
Il. Hysrricopora, gen. nov. 
Genotype. H. horrida, sp. n. Type-specimen. British 
Museum, D. 28460; Coniacian ; Fécamp, France. 
I[I. Prosoropora, gen. nov. 
Genotype. P. arrecta. 
Tabular Diagnoses of the Species. 
A. Ver y many costee—about 40 ................ 1. P neptunt. 
B. Larger (nearly 1 mm. long), more costes (about 
32) ; ; secondary aperture much lower; avicularia 
not so arrect ; erect, unlaminar ............ 2. P. bicornis. 
C_ Smaller (about ? mm. long), fewer cost (about 
22); secondary aperture much higher; avi- 
cularia more arrect; erect, cylindrical........ 3. P. arrecta. 
1. P. [Eschara, pga ate neptunt (d’Orbiguy), 1850, 
Prod. Pal. vol. u. p. 264; Senonian; ‘Tours. Inter- 
preted onthe to dOrbigny, 1851, Pal. Frane. 
pls. 603. figs. 7-9, 684, fig. 12, 1852, p. 221 ; Senonian ; 
Royan. 
at 
