REPORT ON THE REEF-CORALS. 45 
which has budded from the surface of a large and partially dead basal calicle, from which 
also the chief mass of the colony has developed, a tetrameral arrangement is distinctly 
visible owing to a cruciate arrangement of four larger septa; the wall is simple, extremely 
thin, and very slightly and irregularly developed ; the innermost terminations of the septa 
exteriorly give rise to a false columella, the larger septa lower down meeting quite at a 
point ; the dissepiments are extremely abundant and vesiculate, coming high up so as to 
leave but a very small part of the septa free exteriorly, except at the centre, where a 
distinctly marked depression is visible; these dissepiments, in transverse section, are 
seen to be more or less distinctly arranged in concentric circles, especially towards the 
centre where, in the single specimen of the species which was obtained, two distinct nearly 
solid, sub-infundibuliform tabulz are present, which seem to take their origin from 
the concentration and coalescence of the dissepiments, and in which the course of the 
larger septa is clearly visible. 
From the consideration of this form, Moseleya latistellata, and its comparison on the 
one hand with a typical Astreeid like Prionastrea favosa, and on the other hand with a 
Cyathophyllid lke the compound form of Cyathophyllum helianthoides, or like 
Cyathophyllum regium, it results that the essential difference from the Astreeid, and 
the essential similarity to the Cyathophylhd, is to be found in the abundant development 
of vesiculate endotheca coming high up in the calicle so as to leave a very small portion 
of the septa free exteriorly, except at the centre of the fossa, the dissepiments towards 
the centre being arranged in more or less concentric circles, giving rise to or replaced by 
tabulze in which the course of the septa is traceable: characters which are, with but slight 
modifications, the distinguishing features of forms of the family Cyathophyllide. 
Section I. MADREPORARIA FUNGIDA. 
This section is taken as defined by Professor Duncan,’ by whom it is divided into 
the following five families. 
Family I. PLEsioruNGIDz. 
ig II. LopHosErip&. 
,» IIL. Funem.. 
a IV. ANABACIAD. 
5 V. PLEsIoPoRITID». 
Of these the first three are represented in the collection. 
1 Revision, p. 132. 
