I I 



on mie side of the stem are about 1,6 mm. apart. The surface of the ampullae is generally 

 rather uneven. 



Facies Irregularis. Hydrophytum very irregularly flabellate; about 45 mm. in height, 

 surface smooth; cyclosystems bracket-like, not so broad and further apart than in the preceding 

 facies, to which it is otherwise closely related. 



d. 5. eximius fac. minor. Plate I, figs. 7 and 8. 



Stat. 80. 2°25' S., H7°43 E. Strait of Makassar. 34 M. Numerous pieces and small frag- 



ments. Pink. 



Stat. 117. i° 0.5 N., H2°56'E. N. of Celebes. 80 M. 2 pieces and 2 small fragments. Pink. 



Stat. 125. Off Siau, one of the Sangir lis. up to 27 M. 3 pieces. White. 



Stat. 133. Talaut lis. up to 36 M. 4 fragments. Pink. 



Stat. 144. S. of Halmaheira. 45 M. Several small fragments. White and various shades of pink. 



Stat. 154. 0° 7.2N., i30°25'.sE. N.W. of Waigeu Isl. (N. of New Guinea). 83 — 59 M. 4 frag- 

 ments. White. 



Stat. 166. 2°28'.5S., 131 3.3 E. Between New Guinea and Ceram. 118 M. Several small 



fragments. White. 



Stat. 310. 8° 30' S., 119 7'-5 E. E. of Sumbawa. 73 M. 1 Ex. Pink. 



Stat. 315. N. of Sumbawa. Up to 36 M. 1 Ex. Pink. 



This facies varies to a considerable extent in its method of growth. It forms a more or 

 less profusely branched flabellum and may either be very delicate or fairly stout. The branches 

 do not anastomose, but in one or two instances a branch has met some other object and spread 

 out over it in the form of a thin lamina and the surface of this lamina may in its turn, give 

 rise to branches (Fig. 7). The height probably does not exceed 60 mm. and is often much 

 less. The diameter at the base of the main stem is from 2 to 3 mm., that of the axis at the 

 base of the terminal branch varies from 0,4 to 1 mm. The branches zigzag in their course, 

 especially the younger ones. The colour is variable, it may be orange pink, blue pink or white-, 

 when pink, the edges of the cvclosvstems are often of a much deeper colour than the rest of 

 the coral. The surface of the white specimens is longitudinally striated ; in those that are pink 

 the rows of vertical canals (which form the lines) are more irregularly placed, especially on the 

 vouno-er branches, where they form no lines at all. Otherwise the surface is either smooth, or 

 may bear a few short, blunt spines. The bracket-like cyclosystems (Fig. 8) grow far round the 

 stem, which is often small compared with the size of the cyclosystems. Their transverse diameter 

 is about 0,8 mm. and they project 0,4 mm. Successive cyclosystems on one side of the stem 

 are from 1,6 mm. to 2,4 mm. apart; they are usually fairly near together when ampullae are 

 actively formed. The ampullae (Fig. 8 amp.) are generally covered with blunt spines, especially 

 when there are spines upon the stem. In size and method of growth this facies is allied to the 

 varieties dentatus and irregularis, but the cyclosystems closely resemble those on the most 

 delicate branches of the facies altus. 



Facies Minor. Hydrophytum flabellate; younger branches zigzag; surface smooth or with 

 a few blunt spines ; not exceeding 60 mm. in height, very variable in thickness ; cyclosystems 

 bracket-like, often large in comparison to the diameter of the stem. 



