^68 
EADIOPORIDiE. 
Type Species. 
Ceriopora clavata, Goldfuss : Petref. Germ. vol. i. 1827, p. 3G, 
pi. figs. 15<?, b, non c-f. A good section of the internal structure 
is given by Simonowitsch, Bry. Essen. : Verb. nat. Yer. preuss. 
Rbeinl, vol. xxviii. 1871, pi. ii. fig. 2c. 
This species seems the most suitable type, though Ceriopora 
■diadema, selected as the type of JDomopora by d’Orbigny, is a very 
■different Bryozoan. D’Orbigny ’s conception of the genus is, how- 
ever, well shown by his original diagnosis^ : “ Domopora. Ce sont 
des Befrancia, qui par le grand nombre de couches qui se succMent 
forment un dome, ou meme une massue.” This definition was 
repeated verbatim in 1852,- although with the omission of mention of 
the type species. In 1850 he had, however, also included ^ Ceriopora 
diadema, Goldfuss, pi. xi. fig. 12, in Domopora. D’Orbigny’s diagnosis 
would apply to D. clavata or D. stellata, but is quite inapplicable 
to any of the Bryozoa included in Goldfuss’ C. diadema, xi. 
fig. 12; it would be more applicable to the specimen that Goldfuss 
figured on his pi. xxxvii. fig. 3, which is composed of a mass of 
superposed Actinoporm ; but they do not form a dome, a feature 
which is required in Domopora both by the name and by the 
diagnosis. 
D’Orbigny’s selection of Goldfuss’ pi. xi. fig. 12, as the type 
of his C. diadema was unfortunate. Goldfuss gave six figures 
marked fig. 12, viz. Nos. a-f\ they all represent simple, circular, 
flat colonies, which certainly belong to two species. According 
to von Hagenow (Bry. maastr. Kr. pp. 42, 43), Goldfuss’- figs, a-d 
represent one species, which he names Defrancia diadema, and the 
figs, e and / represent another and new species, which he founded 
under the name Defrancia michelini. In this conclusion one detail 
was probably incorrect, as it appears clear from Goldfuss’ description 
of his figures (Goldfuss, op. cit. p. 39) that fig. «?'is the lower side 
of the specimen shown in fig. e. 
It is, however, clear that the Ceriopora diadema, Goldfuss, 
includes two species, which, according to the nomenclature adopted 
in this Catalogue, are — 
1 D’Orbigny. Rev. Mag. Zool. ser. 2, vol. i. 1849, p. 502. 
2 D’Orbigny. Cours Elem. Paleont. et Geol. stratig. : Paleont. vol. ii. fasc. i. 
p. 107. 
3 D’Orbigny. Prod. Pal. vol. ii. p. 267. 
