EEPORT ON THE TIJNICATA. 
305 
bodies aud long tails (PL XXXVIII. fig. 22). The tail has a wide membranous 
fringe but no supporting transverse rays. About the middle of the body there are two 
closely placed pigmented sense organs, and three well-developed adhering papillae are 
situated at the anterior end (PI. XXXVIII. fig. 22). 
LeptocUnum riibicunduni, n. sp. (PI. XXXIII. figs. 9-15). 
The Colony forms an ii-regularly shaped and moderately flattened mass attached by 
a considerable part of the lower surface. The free end is rounded and slightly lobed. 
The surface is uneven and rough. The colour is a bright reddish-brown or rusty colour. 
The length is 3’5 cm., the breadth is 2'5 cm., and the thickness is 7 mm. 
The Ascidiozooids are rather small but numerous. They are scattered evenly over 
nearly the whole surface of the colony. The body is of rounded form, and is not distinctly 
divided into regions. 
The Test is hard and tough. It is reddish-brown and quite opaque on the outer 
surface, whitish-grey and semi-translucent in the deeper parts. 
The spicules are slightly yellow in colour and are stellate in form. They are of rather 
small size, but are abundant in the outer layers of the test. The test cells are small and 
rather scarce. They are usually of rounded or ovate foim. 
The 2[antle is thin and transparent. Its musculature is rather feeble. 
The Branchial Sac is moderately large and has the stigmata well developed. The 
transverse vessels are wide, and are provided with muscle bands. The stigmata are 
moderately long and are arranged with regularity. 
The Endostyle is wide and conspicuous. Its course is straight. 
The Tentacles are numerous but very short. There are about twenty of them ; they 
vary in size, and are not arranged with great regularity. 
The Dorsal Tubercle has a circular aperture of fair size. 
Locality. — Station 149c, Balfour Bay, Royal Sound, Kerguelen Island, January 19, 
1874; dei>th, 20 to 60 fathoms; bottom, volcanic mud. 
A single specimen of this conspicuous species was collected in Royal Sound, Kerguelen 
Island. It is a small colony of irregularly conical form when laid on one side 
(PI. XXXIII. fig. 9) ; and the area of attachment occupies more than half of the lower 
surface. The colour is peculiar. It is in most places a bright rusty browm, but in 
some parts it is much paler, becoming yellowish and almost white, while in others again 
it is darker. 
Only one common cloacal aperture is visible on the upper surface. It is of elliptical 
form, about 2*5 mm. in length and 1 mm. across. No systems are present, the Ascidio- 
zooids being placed at equal distances, with their centres usually about 1 mm. aj3art, all 
(ZOOL. CHALL. EXP. PART XXXVIII. 1886.) Pp 39 
