REPORT ON THE ALCYONARIA. 75 



The polyps, all with the ventral side pressed or applied towards the stem, are 

 cylindrical, slightly expanded only at the mouth, 07 mm. long on the thinner twigs, 

 1 mm. on the branches ; they are placed on the branches and twigs in two alternating 

 rows, at moderate intervals, up to 1'5 mm., from one another. The scales are dorsal and 

 lateral, arranged in seven to eight transverse rows and five longitudinal rows ; the ventral 

 side is destitute of scales. The obliquely truncated calyx mouth is protected by eight 

 thin, triangular, opercular scales, of which the ventral ones are only a little shorter than 

 the dorsal ones. 



The calyx scales are generally roundish or nearly square, with a central nucleus, 

 from which the small prominences extend outwards only a little beyond the half radius 

 of the scale. The upper edge of the scale is finely toothed, fine striaj radiate from the 

 nucleus to the edges. Length to breadth in mm.— 0-12-0-17 ; 0-2-0-2 ; 0-12-0-13. 

 The opercular scales are triangular, toothed lamellaj, truncated at the end, 0"2-0'18 ; 

 0"2-0"16 mm. In the coenenchyma two layers of calcareous scales may be distinguished, 

 which, in the stem, may be readily separated from one another. The upper layer consists 

 of longish, oval lamellae, which overlap one another with their lateral edges. On the side 

 which comes under the edge of the overlapping scale they are provided with relatively 

 strong teeth. The prominences on these scales are very small, in addition the fine 

 radial striation may here also be recognised. Length to breadth in mm. — 0"14-0"17; 

 0"1-0"17 ; 0"22-0"ll ; 0'2-0"13 ; the lower layer consists of very thin oval or irregularly 

 toothed spicules, on which the prominences are only very weakly and sparsely developed. 

 Length to breadth, O'l-Ol ; O'l 1-0-07 mm. 



In this species the new polyps are budded off from the inside of the base of an old 

 polyp, and in process of time, owing to the lengthening of the internode between 

 two polyps, they move away from the mother polyp. Thus the growth may here be 

 designated as intercalary. 



Habitat. — Station 307, ofi" Port Grappler, Patagonia ; depth, 140 fathoms ; bottom, 

 blue mud. 



Genus 7. CaUgorgia, Gray {emend. Studer). 



CaUogorgia, Gray, Proc. Zool. Soc. Lond., 1857, p. 286 ; Ibid., 1859, p. 484. 



Calligorgia, Gray, Cat. Lithophytes Brit. Mus., 1870, p. 35. 



Calligorgia, Studer, Monatsber. d. k. preuss. Akad. d. Wiss, Berlin, 1878, p. 645. 



The genus CaUogorgia was founded by Gray in the year 1857 for Gorgonia verticil- 

 lata, PaUas. The diagnosis runs : — " Coral forked, fan-shaped ; branchlets pinnate. 

 Axis continued, stony, compressed. Bark thin, white, formed of flat angular imbedded 

 granules. Cells in whorls of three, cylindrical, incurved, covered with small imbricate 

 scales." The character of three cells in a whorl does not suit the single species which 

 Gray arranged under this genus. In the year 1859 Gray {loc. cit.) further arranged the 



