SEMICYTIS, ECHINOCAVA. 
121 
Affinities. 
This genus was first described as Echinopora by d’Orbigny in^ 
1849, and the name, owing to preoccupation, altered to Echinocava 
in 1854. It has'hitherto been regarded as a close ally of Ceriopora\ 
but an examination of the specimens from Upware, in the Museum^ 
of Practical Geology, shows that the spines are projecting 
fasciculi, and the general surface is not covered by apertures as 
in a Ceriopora, but is cancellate. 
Acanihopora^ founded for the species A. spinosa by d’Orbigny 
in 1849 as an ally of this genus, is a Hydrozoan. 
UNREPRESENTED SPECIES. 
1. raulini (Michelin), 1841. 
Syn. Ceriopora raulini^ Michelin, 1841. Icon. Zooph. p. 2, pi. i. fig. 7. 
,, [Echinocava) raidini, Etheridge & Newtun, 1878. Cat. Cret. 
Foss. Mus. Pract. Geol. p. 7. 
,, ,, ,, Keeping, 1883. Foss. Neoc. Upware, 
p. 139. 
Echinopora raulini, d’Orhigny, 1849. Genr. nouv. Bry. : Ilev. Mag. 
Zool. ser. 2, vol. i. p. 503. 
,, ,, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 141. 
Echinocava ,, d’Orbigny, 1854. Bry. Cret. p. 1013, pi. 788, 
figs. 7, 8. 
,, ,, Pergens, 1890. Kev. p. 387. 
SemimulticresciH ramosa (?), Etheridge & Newton, 1878. Cat. Cret. Foss. 
Mus. Pract. Geol. p. 7. 
Char. — Zoariura arborescent ; of long, thin, tapering dichotomous branches, 
armed with sharp spines, which are irregularly arranged, but usually have 
four or five in each series around the stem. Apertures small, crowded. 
Distrib. 
British: Lower Greensand: Upware. (Morris Coll. M.P.G., and fide 
Keeping.) 
Foreign: Albian : Grandpre and Macheromenil, Ardennes. ^ 
2. salevensis, de Loriol, 1863. 
Syn. Echinocava salevensis, de Loriol, 1863. Invert. Neoc. moy. Mt. Saleve, 
pt. ii. p. 144, pi. xviii. fig. 4. 
Char. — Branches 16 mm. in dia., somewhat compressed. Spines smaller, 
sharper, and more numerous than in E. raulini. 
Distrib. — Neocomian : La Yarappe, SAvitzerland. 
