~ REPORT ON THE REEF-CORALS. 
“I 
bes | 
Pectinia profunda (Dana). 
Ctenophyllia prafunda, Dana, Zoophytes, p. 172. 
A single specimen was obtained having an elongated narrow form like a young 
specimen of Manicina areolata. It is about 8 em. long and the sides are very undulate, 
so that closely approximated, lateral folds are formed, by the fusion of which, during 
development, the transverse ridges would arise. The pedicel of attachment is very 
small, and a dense epitheca seems to be present covering the corallum up to nearly 1 em. 
from the margin, but this in reality is largely of foreign growth, as of small shells, 
worm tubes, and calcareous algze, and must be very variable in different specimens at 
different localities. The costee are sharp-edged, dentate, narrow, lamellate, radiating to 
the pedicel. The septa are thin, of three, four, or five sizes—many septa of higher 
orders being developed at the curved exterior margins of the series. The columella is 
lamellate, continuous, and joined at the sides by vermiform processes from the lower edge 
of the septa. No endotheca is developed as seen in the calicinal valleys from above, but 
in section rudimentary dissepiments are found at the basal parts of the centres, 
The specimen is a young form; and, owing to the absence of the soft parts, and the 
continuity of the columella, it can only be concluded that the form is a compound one 
by the extremely sinuous edges of the corallum, through the lateral coalescence of which 
transverse ridges are already developing. It very closely agrees with the Sphenophyllia 
Alabellum, Moseley, so much so as to lead me to think that that form may probably be a 
young example of the same species. Unfortunately, little or nothing is known of the 
young stages of any of the species of the genus. 
Locality.—St. Thomas, reefs. 
Genus 7. Trachyphyllia, Milne-Edwards and Haime. 
Trachyphyllia, Milne-Edwards and Haime, Cor., ii. p. 340. 
Fe Duncan, Rev. Madrep., p. 82. 
Trachyphyllia amarantus (Dana). 
Manicina amarantum, Dana, Zoophytes, p. 189, pl. ix. fig. 1. 
The specimens of this species differ not inconsiderably in the size of the calicinal 
series, in the state of development of the pahform lobe, and in the thickness of the 
septa, and consequently in the size of the denticulations of the coste and septa. 
According to these differences, the specimens are strong and thick or comparatively 
delicate and thin. 
Locality.—Mactan Island, Philippines. 
