190 
Joan M. Crockford, M.Sc. 
Remarks : Fenestrellina horologia w’as described by Bretnall from material 
from the Gascoyne River District ; tlie holotype was given as “ Geological 
Survey of Western Australia (specimen 16).” Miss Hosking (1931, p. 13) 
stated that “ the holotype of F. horologia (specimen 16 on 10930) is not to b(‘ 
found in the Geological Survey Collection” but (footnote) ‘'A crumpled 
fragment of a Fencstella zoarium is labelled Holotype, but the distinguishing 
number and the greater part of the zoarium have been broken off.” Speci- 
mens which she identifiecl as Fenestella horologia from the Wooramel River 
District showed a double row of nodes on the carina ; she states that the 
specimen in the Geological Survey Collection was much the same as these, 
but was “* too crumpled for accurate comparison,” and does not say whether 
a single or a double row of nodes was sho^Mi. 
There is at present no specimen in this collection labelled ” 16,” and 
no specimen labelled “ Holotype.” The labels of many of the specimens 
have been wholly or partially destroyed, and there are two eonspecific frag- 
ments of Fenestrellma, whose labels have been almost entirely removed, on 
a specimen of calcareous shale from the Gascoyne River District, figured by 
Bretnall on Plate III. (this specimen shows several more labels now than at 
the time is was photographed). Both of these show a slight carina between 
the two rows of apertures, and over the best preserved parts of the zoaria 
this carina shows a single row of small, high nodes ; both show \-ery well 
the hour-glass shape of the fenestrules described by Bretnall ; it seems 
probable that these were the specimens used for the original description, 
and one of them is here chosen as the neotype (? lectotype). A single specimen 
of a second species showing only two zooecia to each fenestrule is present 
on the same piece of shale ; this specimen shows, very indistinctly, two rows 
of small nodes on the carina, and is probably the species identified as 
Fenestella horologia from the Wooramel River, described in a separate paper 
as Minilya duplaris gen. et sp. nov. (Crockford, 1944, p. 173) ; this, the only 
specimen of this species present in the collection, is very poorly preserved ; 
it does not show any projection of the zooecial apertures into the fenestrules, 
and the hour-glass shape of the fenestrules is not shown at all in this specimen, 
though it is shown in specimens from other localities ; it is not possible that 
Bretnall’s description could refer to this specimen. 
Fenestrellina horologia appears to be the same as Fenestrellina -parviuscida 
(13assler), from the Bitaoeni and Basleo Beds of Timor ; in the original de- 
scription of F. parvniscula the width of the branches is given as “ about 0-2 
mm.”, but the branches of the specimens figured appear to be about 0*3 mm. 
wide, as in the specimens from Western Australia. Elias (1937) has tlealt 
^vith the relationships of this and similar species. F. parviuscida has been 
recordc'd from the Permian of Vancouver Island, llie fenestrate part of 
Lyropora erkosoides (Etheridge) is very similar in size, but is differentiated 
by its more widely spaced nodes. Fenestrellina pectinis (Moore), which has 
been recorded by Chapman from the Callytharra Stage at Callytharra Springs, 
is similar iu appearance, but is a smaller species with more closely sjiac^ed 
nodes. 
Genus LYROPORA Hiili. 
Lyropora Hall, 1857, Proc. Amer. Assoc. Adv. Sci., Vol. X., p. 179. 
Lyropora Hall, Ulrich, 1890, Geol. Surv. Illinois, VIII., pt. II., Sect. IV., 
pp. 396, 580. 
Lyropora Hall, Nickles, and Bassler, 1900, U.S. Geol. Surv., Bidl. 173, 
pp. 39. 309. 
