192 
Joan M. Crockford, M.Sc. 
Remarks : There are two specimens labelled “ 13 " (the number given 
by Rretnall for the holotype of this species) in the material described by 
Bretnal!. The above description is of the figured specimen, here chosen as 
lectotype. A second speciimm, from the Callytharra Stage at Fossil Hill, 
Wyndham River, does not appear to belong to the same species as tlie lectotype, 
from which it differs in the shape of the lateral supports ; only a \’ery small 
portion of the fenestrate part of the /,oarium is preserved, along the sides 
of the lateral supports, and tiiis is decidedly finer than the fenestrate part of 
the lectot;v 7 :)e. 
Ktheridge referred this species teiitatively to the genus Lyropora Hall, 
but, as the celluliferous surface of the specimen was not exposed, considered 
it possible that the species might belong to one of the genera proposed by 
Simpson for forms diflering from the type of Lyropora in the number of rows 
of zooecia normally present on the branches. The type of Lyropora, Lyropora 
fiiibquadrans (Hall) (L. lyra (Hall)), selected by Ulricli in 1890, shows from four 
to five rows of zooecia on the branches ; Lyroporidra Simpson, 1897, is a 
synonym of Lyropora, since it possesses the same genotype. Lyroporella 
Simpson, 1895, was proposed for forms with two rows of zooecia, the genotype 
being Lyropora quincuncialis (Hall) ; Nickles and Bassler (1900, p. 310), who 
considered that the only character of generic importance is the development 
of lateral supports, and McNair (1937, p. 1 14) consider Lyroporella a synonym 
of Lyropora. 
(family SULCORETEPORIDAF Bassler. 
Gsnus RAMIPORA Toiila. 
Ramipora Toula, 1875, Neues Jahrbuch fur Mineralogie, 1875, p. 230, 
pi. X., figs. 1, la. 
Ramipora Toula, Shulga-Nesterenko, 1933, United Geological and Pros- 
pecting Service of the U.S.S.R., Trudi, Fasc. 259, pp. 32, 54. 
Genotype : Ramipora hochstettej'i Toula, 1875. 
Synonym : — 
Aetomocladia Bretnall, 1920. 
Genotype: Aetomoedadia a)}ibrosoides Bretnall, 1920. 
Zoarium pinnate, ivith the lateral branches joined by a third- set of branches, 
which may themselves join to foryyt a further set of branches ; branches bifoliate, 
dividing in a plane at right angles to the mesial lamina ; mesial lamina running 
from the centre of the obverse (poriferous) surface to the centre of the re-verse (non- 
poriferous) surface, and projecting slightly above these surfaces so that both are 
carinate ; zooecia sub-tubular, without hemisepta, arranged in more or less regidar 
rows on each side of the carina of the poriferous surface, but not separated intern- 
ally by vertical plates ; lunaria absent or poorly developed. ; diaphragms extremely 
rare ; acanthopores and mesopo7'es absent ; vesicular tissue well-developed in- 
ternally, interapertural spaces solid at the surface. 
Ramipora differs from Goniocladia Ftheridge in the form of the colony, 
which is reticulate in Goniocladia. Sulcoretepora d’Orbigny (Cystodictya Ulrich) 
differs in its mode of branching (in the plane of the mesial lamina instead of at 
right angles to it), and in the form of the zoarium, and internally in the presence 
of vertical double plates between the rows of cells. 
