688 PROFESSOK J. STANLEY GARDINER ON 



Such sections also mdicate that the corallum thickens by deposition of carbonate of 

 lime on the surface, not within the chambers. 



Xoco^%.— Station 81, lat. 18° 24' S., long. 37° 58' W., Abrolhos Bank, 36 fathoms, 

 20th Dec. 1902 ; two pieces of probably the same colony. The genus is recorded by 

 Milne Edwards and Haime from Reunion, 25 fathoms {Madracis pellana, Ycxlenciennes). 



The specimen is very different from any previously described form, both in its raised 

 calicles and in the considerable distance which separates them, i refer it to Madracis, 

 but I cannot regard this identification as satisfactory without an examination of the 

 polyps ; indeed, I suspect its polyps will prove it to be the type of a new genus. 



Desmophyllum sp. ? 



A small horn-shaped corallite, bent in the middle, over 20 mm. high by 5-6 ram. 

 across the calicle, cannot be referred to any known species. There is only one system 

 of the calicle complete, the rest having been broken into. The septa number 48, 

 ■of which 12 deep down in the corallite have trabeculse fusing to some slight degree 

 with one another. The specimen is stained brown on the outside. 



Locality. — Station 542, Princesse Alice Bank, lat. 37° 56' N., long. 29° 11' W., 350 

 fathoms, 4th July 1904. 



Caryophyllia profunda, Moseley. 

 MosELEY, Report on the Corals, " Challenger" Expedition, p. 138, pi. I. fig. 6, a, b (1881). 



Three complete specimens 30-34 mm. high, three further specimens with broken 

 stems but calicles complete, and broken fragments. Calicles varying from 16x14 mm, 

 up to 24 X 21 mm. in diameter. 



I have compared the specimens with the types of Caryophyllia profunda, Moseley, 

 in the British Museum ; the latter consist of about twenty specimens, including two large 

 masses grown together as represented in the excellent figure on plate 1. referred to above. 

 The present specimens agree with the type in shape, and some of them, as are some of 

 the types, are coloured brown on the outside, with perhaps a darker ring near the edge 

 of the calicle. The costse are rather more marked in the larger specimens ; all have a 

 peculiar shiny appearance on the outside of the corallite, and in no specimens do the 

 costse extend to the bases of attachment. The septa vary from 80 to 96 in number, 

 and the pali in correspondence vary from 20 to 24 plates. The columella consists 

 of twisted ribbons freely anastomosing underneath, the whole forming an oval-shaped 

 mass varying up to one-third the length of the calicle, and generally being rather 

 more than twice as long as broad. The regular arrangement of the ribbons in a line, 

 as represented in Moseley's fig. 6a, is not typical either of the type specimen or of 

 the forms under consideration. 



The type specimens, taken as a whole, differ from the present specimens in being 

 rather larger and more robust, viz. in having thicker septa and pali, coarser ribbons 

 to the columella, and slightly more exsert septa. The type specimens show great 

 variation, but individual specimens of the two collections agree in all particulars. 



