292 Mr. J. J. Quelch on new Genera and 
XXXIV.—Preliminary Notice of new Genera and Species 
of ‘Challenger’ Reef-Corals. By J. J. Quetcu, B.Sc. 
(Lond.). 
Part I. 
THE present paper contains short descriptions of five new 
genera and their typical species in the collection made during 
the voyage of H.M.S. ‘ Challenger.’ More complete descrip- 
tions, with figures, will be given hereafter in the ‘ Challenger’ 
series, when also their affinities with fossil and recent forms 
will be discussed. It is sufficient in this notice to point out 
that Physogyra is to be classed with Plerogyra, Napopora 
close to Synarrhaa and Stephanaria, Sandalolitha to Halo- 
mitra and, perhaps, to Zoopilus ; while Tichoseris and Mose- 
leya may be mentioned as presenting special interest.  T%cho- 
seris takes a very clearly transitional place between the 
Lophoserine and the Astreide ; while Moseleya, which I have 
had the pleasure of naming in honour of Prof. Moseley, seems 
to necessitate the establishing of a new subfamily of the 
Astreide to receive it—subfamily Moseleyine, characterized 
by the abundant endotheca with the dissepiments in more or 
less concentric circles, forming nearly complete tabule at the 
centre. The approach which it makes to the Rugosa seems 
tome to point to the very probable dismemberment of that 
group. 
MOSELEYA, nov. gen. 
Corallum compound, flattened, or slightly and broadly con- 
vex. Young calicles developing by calicinal marginal budding 
around a very large median calicle, which has very numerous 
septal orders, the calicles becoming polygonal and deep at 
the centre. Epitheca very slight; wall very thin and almost 
rudimentary, but developed so as to give a distinct simple line 
of separation to the calicles on the surface, often interrupted, 
seen in section in a very rudimentary state separating the 
calicinal centres. Coste very distinct, thin, and finely den- 
ticulate. Septa often confluent and continuous from centre to 
centre in the line of union between adjoining calicles; very 
thin and close, finely toothed above, and having the teeth 
subequal or slightly larger near the centre. Endothecal 
dissepiments vesicular, very abundantly developed, leaving 
but a very small portion of the septa free exteriorly, seen in 
transverse section forming nearly concentric lines, and more 
or less complete tabule at the centre. A false columella 
