107 



small, flat, smooth, irregular spindles. The larger vary from 0-36 to 22 mm. 

 in length, and from O-QG to O'lo mm. in breadth. 



(/;) The stalk contains spindles, three-rayed and tripod forms. All are 

 covered with very rough branched warts. Several of the spindles show a 

 division into two or three parts at one end. Si)indles average 072 mm. in 

 length by 009 mm. in breadth. The three-rayed forms, which may have a ray 

 divided into two or three, measure up to 0"6 mm. in length, and the tripods 

 0'48 mm. There are in addition small, flattened, irregular spindles. 



Colour — Stalk, stem and branches white to semi-transparent (or bluish- 

 milky-white) ; polyjis white with pinkish-red spicules at the base ; Stutzbiindel 

 pinkish-red, that colour predominating more on the outer polyps. 



Locality : Padaw Bay (Dr. Anderson). 



Dendronephthya quadrata, Henderson. 



This species is represented by a complete specimen which measures 5 '6 cm. 

 in height and about 3 "7 cm. in greatest breadth. 



The stalk is short, 2 cm. in length, thick and rigid, and gives off from 

 its base a number of stolons. It is marked by a number of rings and has 

 a wavy apijearance. 



The polyparium is large, greatly flattened in one 

 plane, almost regular in outline, and with an even un- 

 broken surface. It is more or less quadrilateral in shape 

 with the corners rounded ott' and the sides slightly ir- 

 regular, and consists of a number of branches which vary 

 little in size, the upper being slightly the longer, and are 

 most developed in the j)lane of flattening. The branches 

 are short and thick, and by repeated division give rise 

 to the blunt stump-like polyp-bearing twigs. In addi- 

 tion to the larger branches numerous smaller branches 

 arise on the lateral surface of the stem. 



The polyps are arranged in groups of four to twenty, 

 and these again into still larger groups. In the groups 

 all the polyps reach the same level so that the larger 

 groups have a perfectly level or slightly concave surftice. 



They are rounded bodies measuring 048 mm. in height and 0'64 mm. in breadth, 

 and are placed at a very obtuse angle on the stalk which varies greatly in length 

 and may reach about 0'6 mm. in length. The spicules are arranged in eight 

 double rows in each of which there are five pairs of converging spicules, the 

 uppermost pair of each row being slightly larger than the others. There are 

 also a few transversely placed spicules at the base. The spicules are straight 



Fig. 52. D. quadrata. 



