ANIMALS. Al 
however, of the Lamarckian genus is the first-described species, the Jllepora 
reticulata of Linneeus, an irregularly-reticulated frondiferous Coral, having its inner or 
upper surface exceedingly verrucose through the irregular prominency of its tubes. 
Lamouroux and Blainville, observing the striking difference between the Retepora 
reticulata, as it may now be termed, and the next species which Lamarck noticed, 
namely, the A/llepora cellulosa of Linnzeus, took the opportunity of placing the latter 
as the type of Retepora, making, at the same time, a new genus for the former— 
Lamouroux calling it AKrusensternia, and Blainville, Frondipora. This is a proceeding 
which cannot be too much discountenanced, as it involves scientific nomenclature in the 
greatest possible confusion, and without any prospect of its being ended. It is chiefly 
to a similar proceeding on the part of other writers, that so many difficulties beset the 
study of most of the genera of Palaeozoic Corals. The plan which I purpose adhering 
to throughout this Monograph is to consider the first species described under the head 
of any genus to be the type of it, unless otherwise stated; as I feel persuaded that 
this will enable me to treat authors with every fairness due to them, and at the same 
time it will dispose of many such difficulties as those complained of. 
It may now be allowed me to transcribe a portion of what I have already published 
im connexion with the genus founded on the A/depora cellulosa. 
“ Family KLASMOPORIDA, King, 1849. 
“This group agrees with Hscharide in the structure of its polypidoms or cellules, 
but differs therefrom in being uni-lamello-celluliferous, and reticulated. Only the 
following genus is known to the writer. 
“Genus Hasmopora, King, 1849. 
*“ Diagnosis—The typical Elasmoporidia, consisting of infundibuliform, folded, 
perforated fronds or foliaceous expansions, which are entirely celluliferous; the 
cellules opening on their inner or upper surface. Ced/ules arranged alternately, and 
running more or less parallel to the plane of the fronds ; their front and dorsal walls 
forming the two faces of the fronds. Cellule-upertures approximating more or less to 
a position at right angles to the plane of the fronds, and furnished with tubular and 
other processes on their inferior or projecting margin. Gemmuliferous vesicles overlying 
the cellule-apertures. Both surfaces of the fronds foraminated. Outer or under surface 
of the fronds marked with distant waved lines, forming the boundaries of the cellules. 
“Type, Millepora cellulosa, Linnzeus, a species occurring in the Mediterranean. 
An allied species (Hlasmopora Beaniana, King) inhabits the British seas.”” 
' Annals and Magazine of Natural History, 2d series, vol. iii, p. 390. 
