REPORT ON CORALS—DEEP-SEA MADREPORARIA. 139 
This species is very near to Caryophyllia clavus, but differs from it in having fewer 
costee, and these more delicate and not all equally prominent, and also in the abundant 
epitheca developed around the base. 
All the specimens obtained were fused together into masses, composed of eight or ten 
coralla, united by the abundant encrusting epitheca which in places spreads over and 
partly conceals old dead calicles forming parts of the masses. 
The corals were obtained in the living condition, and observed expanded in sea 
water. They varied much in colour. In the largest specimen obtained, which is that on 
the extreme right in fig. 6, Plate I., and the calicle of which is shown in fig. 6, a, the disc 
was of a transparent bluish colour, so transparent that the pali were visible through it. 
Near the margin of the calicle the disc was of a sulphur-yellow colour. The margin 
of the mouth was white, and was thrown into a number of folds or plaits, of which 
twenty-two were counted on one side. Other specimens adhering to the same mass 
had their transparent discs marked with burnt-sienna coloured streaks in place of the 
yellow, and one of these had the margin of the mouth vermilion coloured, instead of 
white, as had also another which was streaked with yellow, like the largest specimen. 
The tentacles were all short and conical, each with a red knob at the tip. Each septum 
had a single tentacle placed at its inner margin. The tentacles were thus disposed at 
successively further distances from the axis of the coral, and decreased correspondingly 
in dimensions, being of four sizes. 
Extreme height of the longest specimen 47 mm. Long diameter of the calicle 27 
mm. Shorter diameter 23 mm. 
Station 135, off Nightingale Island, of the Tristan da Cunha group, 100 to 150 
fathoms ; abundance of specimens. 
A fragment possibly referable to this species was dredged with Corallium rubrum, 
off St Jago Island, Cape Verde group, in 100 to 120 fathoms. 
Caryophyllia maculata, Pourt. (Pl. IV. figs. 8, a, 9, a). 
Bathycyathus maculatus, Pourtales, Il. Cat. Mus., Harvard, No. 8, p. 34, pl. vi. figs. 5, 6. 
Parasmilia variegata, Pourtalés, Tl. Cat. Mus., Harvard, No. 4; p. 21, pl. i. fig. 13. 
Bathycyathus elegans, Stiider, Monatsbericht der K. P. Akad. der Wiss., Nov. 1877, s. 628, 
pl. i. figs. 1, a-d. 
Professor Stiider described his Bathycyathus elegans in ignorance of Pourtals’ 
Bathycyathus maculatus, which appears to be identical with it, and takes precedence. 
I see no reason to separate Bathycyathus from Caryophyllia, because of the smallness of 
the pali, or the superior exsertness of the quinary septa. The whole aspect of the 
present coral when grown under favourable conditions is that of a Caryophyllia. 1 
have therefore placed the species in that genus. Pourtalés’ Parasmilia variegata 
seems certainly to be inseparable from Bathycyathus, and, most probably, both from the 
