99 



Umbellula pendula, n. sp. 



This species is represented by one complete colony, which has a total lenoth 

 of 744 mm. 



The stalk is very long, and has a large swelling at the basal cud, which 

 extends for a considerable distance, nearly 170 mm. upwards. From this point, 

 however, the stalk tapers gradually towards its upper end. 



The axis is somewhat oval in section, and brownish in colour. Near the lower 

 end it has a diameter of r9 mm., but it tapers abruptly towards the base, where 

 it ends in a short coil, and is thread-like. At the upper end it becomes cylindrical, 

 and gradually tapers. It has a diameter of 075 mm. at a point just below the 

 beginning of the rachis. In the lower part it is rigid, in the upper part it 

 is quite flexible. 



The pendulous rachis is 55 mm. in length, and stretches on the concave side 

 of the bent stalk as a thin membrane. In its lower part the proracbidial surface 

 is marked by a stiff ridge, formed by the prolongation of the axis ; thus it is 

 somewhat bilateral in shape ; but this bilateral symmetry is soon lost, and a radial 

 arrangement assumed. 



The numerous long autozooids are arranged in irregular whorls. They may 

 attain a length of 40 mm., and have a basal width of 2-5 mm. There are long 

 slender tentacles, with one row of pinnules on each side. The autozooids are 

 creamy white in their lower parts ; the dark bluish-black stomodseum shines through 

 the upper part. 



Siphonozooids are abundant, occurring all over the rachis, with the exception 

 of the short ridge on the prorachidial surface of the lower part. They are small 

 (0"2-0"3 mm. in height), and appear as minute conical projections on the surface. 



Spicules are entirely absent, none being found either in the polyps, the rachis, 

 or the stalk. 



Locality: Andamans ; 188-220 fathoms. 



Umbellula indica, n. sp. 



This species is represented by a complete specimen, measuring 706 mm. in 

 length. 



The stalk tapers gradually from a little above its base to its junction with 

 the rachis. On the lower part there is a large swelling, which extends for a 

 considerable distance up the stem. It has four wing-like projections, and is 

 hollow. The lower part of the swelling is smooth, but the upper part is roughened 

 liy the siphonozooids, which project like warts above the surface. The siphono- 

 zooids can be traced almost up to the junction with the rachis. 



The axis is c|uadrangular, with the sides slightly convex, and measures 2 mm. 



