192 
moderately sub-conical, that the ornamentation of the plates 
exhibits very great diversity, ranging from a few radial lines of 
granulations of varying prominence to densely-packed granula- 
tions without any conspicuous radial arrangement; Bittner’s 
Coptechinus pulchellus is a form between these extremes. 
MOoNOSTYCHIA AUSTRALIS, Laube. 
Id., Bittner, op. cit., t. 2, figs. 5-8, p. 345. 
MonostycHiA ETHERIDGEI, Johnston. 
Micraster Etheridget, Johnston, Proc. Roy. Soc. Tasm., 1877, 
p: 116: 
Monostychia Etheridger, Johnston, Geology of Tasmania. 
During a recent visit to Table Cape I collected a single ex- 
ample of a small Monostychia, which is without doubt Johnston’s 
species. The original generic reference by Johnston must have 
been a lapsus calami, as the diagnosis of the species imperfectly 
indicates a Monostychia-like fossil, and the subsequent reference 
as given above may be regarded as a corrected erratum. 
M. Etheridgei differs from MW. australis by its narrow oblong-oval 
outline and its low regularly-convex dorsal surface, broadest 
behind, with blunt incisions, and gradually narrowing to the 
somewhat-produced shortly-rounded anterior margin ; the tumid 
ambital margin is very distinctive. Length 18:5, greatest breadth 
14-5, thickness 3:75 mm. Specimens from the Murravian beds 
attain to twice these dimensions. 
FIBULARIA GREGATA, Tate. 
Id., Bittner, op. cit., t. 2, fig. 2, p. 347; var. orbiculus, t. 2, 
io. 
Fibularia Tatei, Bittner, op. cit., t. 2, fig. 3, p. 348. 
Mr. Bittner’s new species represents an individual state of a 
profusely-abundant and protean form. 
CASSIDULUS LONGIANUS, Gregory. 
Australanthus longianus, Bittner, op. cit., t. 3, fig. 2, p. 390. 
Gregory’s species is made the type of a new genus. I am not 
prepared to discuss the advisability of this step. 
CATOPYGUS ELEGANS, Laube. 
Tristomanthus elegans, Bittner, op. cit., t. 4, fig. 3, p. 352. 
Bittner established a new genus for the reception of our fossil, 
Nucleolites subcarinatus, Goldf., and Echinanthus subhemi- 
sphaericus, Ebert. The Australian species had already been 
separated from Catopygus under the subgeneric title of Studeria, 
and there is no valid reason for its rejection and the substitution 
of Tristomanthus. 
