SPAESICAYEA. 
;89 
Disteibution. 
Upper Chalk : Bromley, Kent ; Slieve Gallion, county Derry. 
UlGrEES. 
ri. XIII. Fig. 14. A stem fi’agment, X 8 dia. Tipper Chalk: 
Bromley. Simmons Coll. D. 2834. 
PI. XIII. Fig. 17. A stem, x 12 dia. Upper Chalk: Slieve 
Oallion, Derry. Presented hy J. "Wright, Esq. D. 3277. Fig. IV) 
is the continuation of the lower part of Fig. \1a. 
Affinities. 
This species is of interest from its union of the radial ribbing 
of Sparsicavea with, in places, a Petaloporoid arrangement of 
maculae. The maculae are large and elongate, and resemble those 
of the Cavea elongata of d’Orbigny and Yon Eeuss (p. 397). 
LIST OF SPECBIEXS. 
D. 3277. Five long fragments. Upper Chalk Powder. Slieve Gallion, county 
Derry. Presented by J. Wright, Esq. Figd. PL XIII. Fig. 17. 
D. 2834. A small fragment (on slide). Upper Chalk. Bromley. Simmons Coll. 
Figd. PL XIII. Fig. 14. 
3. Sparsicavea undulata (von Hagenow), 1851. 
Synonymy. 
JSeteropora undulata, von Hagenow, 1851. Bry. Maastr. Kr. p. 47, pL v. 
fig. 16. 
,, „ Winkler, 1864. Mus. Teyl. : Cat. Pal. livr. ii. p. 208. 
Clausa ,, d’Orbigny, 1854. Bry. Cret. p. 894. 
■Sparsicavea ,, d’Orbigny, 1854. Ihid. p. 949. 
,, ,, Ubaghs, 1888. Compt. Bend. Exc. : Bull. Soc. beige 
Geol. vol. L, Mem. p. 233. 
JSeteropora dichotoma, pars, Hamm, 1881. Bry. mastr. Ob. -Sen. p. 36. 
Diagnosis. 
Zoarium of compressed branches which dichotomize hut rarely. 
The zoarium appears laterally notched, owing to the presence 
of alternate lateral areas, free Horn apertures, which are 
surrounded by a prominent rim. 
Maculae in sinuous longitudinal series, or in circular series round 
the apertures. 
Apertures crowded ; quincuncially arranged. 
