“Cribrimorph” Cretaceous Polyzoa. 385 
8. A. limaz, sp. n. 
Type-specimen. British Museum, D. 21953 ; cortestudi- 
narium-zone ; Luton, S.E. of Chatham, Kent. 
9. A. gasteri, sp. n. 
Type-specimen. British Museum, D. 28249; cortestudi- 
narium-zone ; Cuckmere Haven, Sussex. 
10. A. frequens, sp. n. 
Type-specimen. British Museum, D. 28252; cortestudi- 
narium-zone ; Cuckmere Haven, Sussex. 
11. A. levinseni, sp. n. 
Type-specimen. British Museum, D. 28235 ; mucronatus- 
zone; Rigen. 
12. A. [Hippothoa] aggregata (Marsson), 1887, Pal. Abh. 
vol. iv. part 1, p. 92, pl. ix. fig. 10; mucronatus-zone ; 
Riigen. 
II. CorympBorora, gen. nov. 
Genotype. C. religata, sp. n. Type-specimen. British 
Museum, D. 28488; Cenomanian, Korycaner Schichten ; 
Kank, Bohemia. 
III. Potycerarorora, gen. nov. 
Genotype. P. [Lepralia] euglypha (Novak), 1877, Denk. 
k. Acad. Wiss. Wi ien, vol. xxxvil. part il. p. 92, pl.i. figs. 10- 
11; Cenomanian, Korycaner Schichten ; Bohemia. 
IV. Arcopora, gen. nov. 
Genotype. A. segnis. 
Tabular Diagnoses of the Species. 
A. Coste about 16; length about 4mm. ........ 1. A. segnis. 
B. Costz about 20. ; 
I. Smaller, nearer 4 mm. in length; secondary 
tissue surroundsavicularia .............. 2. A. pigra. 
II. Larger; no secondary tissue surrounds avi- 
CWIAMIA) ..<)42 5 CREE DUR Sac TO a ee 3, A. improba, 
