140 THE VOYAGE OF H.M.S. CHALLENGER. 
description he gives of it and his figure, to be referable to the present species. In his 
description the corallum is said to be of “ irregular shape, resulting from the young being 
originally attached to fragments of the parent which become gradually covered over and 
incorporated by the base ;” ‘the coste distinct to the base, and fine granulated ;” “the 
septa of the third order lowest of all;” “the primary and secondary septa coloured of a 
dark purple, which colour continues some distance down the corresponding costa ;” ‘ the 
young bud out of the calicle, which is split in consequence.” All of these peculiarities 
apply also to Bathycyathus maculatus, as described and figured by the same author, and 
as may be seen in the present Challenger specimens. Moreover, in some of the Chal- 
lenger specimens (fig. 8, «), which are undoubtedly from Pourtalés’ photographic figure 
identical with Bathycyathus maculatus, the tertiary coste are most prominent, and in 
some there is a coloured spot on each of the quaternary costee below the border of the 
calicle, peculiarities also cited by Count Pourtalés as occurring in Parasmilia variegata. 
It is further stated that the presence of dissepiments was not observed in this latter coral. 
The specimen here figured (fig. 9, a) is exceptionally large and evenly grown, being 
attached to a Gorgonoid stem. The primary and secondary costa are prominent near 
the margin of the calicle, are there coloured brown, as are also the exsert parts of the 
corresponding septa. A few of the tertiary septa are tipped with brown, and there is a 
brown dot on one or two of the quaternary coste. The pali are more than usually 
well developed, as also the columella, which is composed of a mass of twisted and 
contorted coral matter continuous with the inner margins of the septa. The amount 
of coloration of the septa seems to vary widely in this species, as might be expected, 
but the presence of dark brown pigment tinging some septa and costee and not others is 
characteristic of it. 
Station 170. Off the Kermadec Islands. 630 fathoms. One specimen only. 
Station 122. Off Barra Grande, Brazil. 400 fathoms. Five specimens. 
Caryophyllia lamellifera, n. sp. (Pl. IL. fig. 7, a-b). 
The corallum is cylindro-conical, attached by a stout pedicle, which is dilated and 
encrusted at the base. The whole is in the adult compressed and slightly curved. It is 
of a brown colour, both in the adult and young. ‘The entire outer surface of the corallum 
is covered with a series of delicate but sharply-cut projecting ridges or lamellee formed of 
epithecal substance, which give it the appearance of the cutting surface of a file. The 
lamelle, which are sharp-edged, are separated by sulci, which are of about three times 
their own width. They course parallel to one another horizontally around the surface of 
the corallum, and the several ridges extend for long distances, branching, or joining 
contiguous ridges only at long intervals. Some ridges probably extend entirely round the 
pedicle and cup of the corallum. The ridges are of hard and glistening coral substance ; 
they are continued over the coste, which are but little prominent, and on the outer edges 
