REPORT ON CORALS — DEEP-SEA MADREPORARIA. 139 



This species is very near to CaryophyUia davits, but differs from it in having fewer 

 costse, 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. 



CaryophyUia maculata, Pourt. (PI. IV. figs. 8, a, 9, a). 



Balhycyathus maculatus, Pourtales, 111. Cat. Mus., Harvard, No. 8, p. 34, pi. vi. figs. 5, 6. 

 Parasmilia variegata, Pourtales, 111. Cat. Mus., Harvard, No. 4, p. 21, pi. i. fig. 13. 

 Batliycyathus elegans, Stiider, Monatsbericht der K. P. Akad. der Wiss., Nov. 1877, s. 628, 

 pi. i. figs. 1, a-d. 



Professor Stiider described his Batliycyathus elegans in ignorance of Pourtales' 

 Batliycyathus maculatus, which appears to be identical with it, and takes precedence. 

 I see no reason to separate Batliycyathus from CaryophyUia, 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 Caryopliyllia. I 

 have therefore placed the species in that genus. Pourtales' Parasmilia variegata 

 seems certainly to be inseparable from Batliycyathus, and, most probably, both from the 



