REPORT ON THE TUNICATA. 
233 
Amaroucium colelloides, n. sp. (PL XXYII. figs. 9-12). 
The Colony is an elongated pyriform body consisting of an irregularly ovate head, 
and part of a short thick peduncle. The top forms a blunted point, the sides are 
not fiattened, and the base passes gradually into the peduncle. The colour is a dull 
grey, spotted with lighter grey marks caused by the bodies of the Ascidiozooids. The 
peduncle is darker in colour on account of adhering sand-grains. The surface is uneven 
and not very smooth. 
The leno-th of the head is 2‘2 cm., the greatest thickness is 1‘2 cm., and the thick- 
ness of the peduncle is 0‘9 cm. 
The Ascidiozooids are of moderate size, and consist each of an anterior part about 2 
mm. in antero-posterior length and nearly 1 mm. in greatest breadth, and which consists 
of the branchial sac and the alimentary canal, and a posterior part, the post-abdomen, 
which is very long and narrow and may be traced downwards into the peduncle. 
The Test is moderately firm, and is not very transparent. It is of a dull grey colour, 
and is formed of a homogeneous matrix in which are scattered the usual small cells of 
various shapes. No bladder cells are present. 
The Mantle is not very strong. The muscle bands are thin and are placed rather 
far apart. 
The Branchial Sac is small. The transverse vessels are rather wide, and are all of 
the same size. The stigmata are moderately long and narrow. 
The Endostyle is conspicuous and has a very undulating course. 
The Reproductive Organs are placed in a very long and narrow post-abdomen. They 
are hermaphrodite. 
Locality. — Station 142, December 18, 1873; lat. 35° 4' S., long. 18° 37' W.; depth, 
150 fathoms ; bottom, green sand ; bottom temperature, 47° F. 
There is only one specimen of this species in the collection. It was obtained 
south of the Cape of Good Hope, from a depth of 150 fathoms. In external form 
(PI. XXVII. fig. 9) the colony is like some of the species of Colella, but in its structure 
it is clearly one of the Polyclinidse. The peduncle has been broken across about 8 mm. 
below the base of the head, but probably it was not very much longer, as the sandy 
condition of what remains suggests that it was situated not far from the point of attach- 
ment of the colony (PI. XXVII. fig. 9). 
The head is long and narrows considerably towards the upper end. At the base 
it passes gradually into the relatively thick peduncle, which was probably not more 
than 2 cm. in length when complete. The peduncle is firm, and is penetrated in all 
directions by the long narrow’ posterior prolongations of the Ascidiozooids in the head 
above. The outer layer of the peduncle has a good deal of sand imbedded in it 
(PL XXVII. fig. 9). This gives it a darker colour than the head. 
(ZOOL. CHALL. EXP. PAET XXXVIII. 1886.) 
Pp 30 
