216 
ZONATULID.li. 
Affinities. 
This species resembles the clavate Cerioporca (or cf. C. digitalis), 
but differs by the zonal structure due to the horizontal laminae. 
The clavate shape of the zoarium separates it from Zonatula vinei. 
10 , 297 . The type - specimen. Lower Greensand. Farringdon, Berkshire. 
Mantell CoU. Figd. PL IV. Fig. 10. 
3. Zonatula favus (Seeley), 1866. 
Synonymy. 
Reptomulticava favus, Seeley, 1866. Foss. Himstant. : Ann. Mag. Nat. Hist. 
ser. 3, vol. xvii. p, 181. 
,, ,, Vine, 1891. Pol yz. Bed Chalk : Proc. Yorks. Geol. Soc. 
vol. xi. p. 383. 
? Ceriopora spongites, Wiltshire, 1859. Bed Chalk: Geol. 1859, p. 276. 
? ,, ,, Seeley, 1861. Posit. Bed Limestone: Ann. Mag. Nat. 
Hist. ser. 3, vol. vii. p. 243. 
non Reptomulticava micropora, Vine, 1889. Polyz. Greensd. : Proc. Yorks. 
Geol. Soc. vol. xi. p. 258. 
Vine, 1890. Bry. Bed Chalk: Quart. Journ. 
Geol. Soc. vol. xlvi. p. 480. 
Vine, 1891. Bep. Cret. Polyz. : Bep. Brit. 
Assoc. 1890, p. 384. 
Vine, 1891. Polyz. Bed Chalk: Proc. Yorks. 
Geol. Soc. vol. xi. p. 382. 
Vine, 1891. Bep. Cret. Polyz. : Bep. Brit. 
Assoc. 1890, p. 396. 
Vine, 1892. Addit. Cret. Polyz. : Proc. Yorks. 
Geol. Soc. vol. xii. p. 152. 
Vine, 1893. Compl. Bep. : Bep. Brit. Assoc. 
1892, p. 334. 
Zonopora irregularis, non d’Orb., Vine, 1890. Polyz. Bed Chalk : Quart. 
Journ. Geol. Soc. vol. xlvi. p. 482. 
,, ,, Vine, 1891. Polyz. Bed Chalk : Proc. Yorks. Geol. Soc. 
vol. xi. pp, 383-4. 
,, ,, Vine, 1891. Bep. Cret. Polyz. : Bep. Brit. Assoc. 1890, 
p. 396. 
Heteropora ,, Vine, 1893. Compl. Bep.: ibid. 1892, p. 332. 
Zonopora undata, Vine, 1891. Bep. Cret. Polyz. : ibid. 1890, p. 384. 
,, ,, Vine, 1892. Addit. Cret. Polyz. : Proc. Yorks. Geol. Soc. 
vol. xii. p. 152, pi. vi. figs. 8, 9. 
Heteropora ,, Vine, 1893. Compl. Bep. : Bep. Brit. Assoc. 1892, p. 332. 
Diagnosis. 
Zoarium of short, thick, cylindrical stems, with horizontal 
laminae separating layers of crowded zooecia. Young zooecia 
grow in circular groups of short tubular zooecia. 
Apertures circular or slightly angular. 
non , , , 
Ceriopora , 
5 > 5 
non . , , 
