95 



Tlie spicules of the stem are smaller than those of the autozooids and pro- 

 portionally wider. They are flat, and have a number of ribs running lonoi- 

 tudiually. The following measurements were taken of length and breadth in 

 millimetres : 



0-14X0-05; 0-16X0-045; 0-09x0-05. 



This species is intermediate between Umhellula giintheri, KoUiker, and 

 Umhellula leptocaulis, Kolliker. 



Locality : Station 278 ; 6° 52' N., 81° 11' E. ; 1912 f\xthoms. 



Umbellula rosea, n. sp. Plate V. fig. 5. 



This species is represented l)y a single greyish-white specimen, which had a 

 beautiful pink colour when alive. The total length was 185 mm. 



The stalk is very long and flexible, quadrangular in section, marked by a 

 groove on each surface, and never exceeding 1 mm. in diameter. The axis is 

 quadrilateral, and so deeply grooved on the sides that the wing-like angles seem to 

 be joined by a small central portion. On the stalk there is a terminal enlargement 

 and another longer one slightly above. 



The rachis is very short, distinctly bilateral, with two pairs of lateral autozooids 

 and one terminal. The autozooids have a length of 5-6 mm. even in the slightly 

 contracted state, and a diameter of 2 '5 mm. at the base. The tentacles may reach 

 a length of 6 mm. 



Siphonozooids are present on the metaraehidial surface, and extend between 

 the bases of the autozooids on to the pararachidial surfaces, but are apparently 

 absent on the prorachidial surface. 



In the lower part of the stalk there are abundant short and thick ellipses 

 with numerous ribs. The following measurements were taken of length and 

 breadth in millimetres : 



0-16 X 0-03; 0-10 x 0-04; 0-09 x 0-03. 



In the autozooids a few spicules can be seen in the skin ; they are longer 

 and proportionally thinner than those of the stalk, rough at the ends and at the 

 margin, the rough appearance being apparently due to the frayed edges of the 

 ribs. Their measurements, taken as above, are as follows : 



0-3 X 0-25; 0-26 x 0-03; 0-22 X 0-02. 



Locality : Station 117 ; 11° 58' N., 88° 52' 17" E. ; 1748 fathoms. 



Umbellula purpurea, n. sp. Plate VIII. fig. 3. 



The specimens representing this species were dredged from various depths in 

 the vicinity of the Andamans. 



The stalk is long, flexible, quadrangular in section with prominent edges, .so 



