TUNICATA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 317 
Some of the Ascidiozooids in this colony are the best preserved I have seen in all the 
various samples of this species that have passed through my hands, and their anatomical 
and histological characters agree in detail with the excellent account of “ Julinia” given 
by Catman. In fact, I can agree with CaumaN in every respect save that of bestowing 
a new name on the genus. It is evident from his remarks that he recognised the close 
affinity to Distaplia, and the only mistake he made was in not referring the species to 
that genus. 
I agree, however, with HartmMryER™ that it is practically certain that this form had a 
distinctive generic name applied to it at a still earlier date. The ‘‘ Holozoa cylindrica” 
of Lesson (Voyage ‘ Coquille,” Zool., ii. p. 439; 1830) agrees in all the points that are 
mentioned in the brief description with our form. It is said to have a “ holothuriform ” 
body, cylindrical, with rounded ends, free and floating (which is apparently the con- 
dition in which our form is usually picked up), of mucous appearance, with a whitish 
fibrous centre composed of tubes coming from the ends of the animals (= Ascidiozooids). 
It was found “30 leagues from Terre-des-litats,” at the southern extremity of America. 
I notice that MicHartsen (Hamburger magalhaensische Sammelreise, ‘Tunicaten,” 
1907, p. 40) has also suggested with a (?) that Lesson’s Holozoa cylindrica is the same 
as “ Julinia” (or Distaplia) rgnota. 
Family PoLycLinip&é. 
Polyclinum complanatum, Herdman (?). 
The species was describedt from a specimen obtained at Port Jackson, Australia. 
The Scotia material was taken at Station 483, at the entrance to Saldanha Bay, on 
May 21, 1904, from a depth of 25 fathoms. It consists of four fragments, cut probably 
from the same colony, the largest of which measures about 6 cm. by 2. The colony 
was apparently flattened, and had much the same shape and colour as the Australian 
one. The Ascidiozooids also have the same type of structure. The post-abdomen is 
rather longer than in the Australian specimens, but that is a matter that varies with 
the reproductive condition. The specimens are, however, so fragmentary, and there 
is so little that is distinctive, that I cannot be certain as to the identity of the species ; 
but there is nothing in the microscopic details to negative the view that the Falkland 
Islands specimens belong to this Australian species. 
Amaroucium distomoides, Herdman (?). 
I refer one large colony and a few small fragments in the Scotea collection to this 
Australian species.{ The original specimen came from Port Jackson; the Scotia 
* Tn the new edition of the “ Tunicata” of Bronn’s Tier-Reichs. 
+ See Herpman, Descriptive Catalogue of the Tunicata of the Australian Museum, Sydney, N.S.W., 1899, p. 81. On 
the plate (Pcl. I. figs. 9-12) it is referred to as “ Polyclinum depressum.” 
t See Herpmay, zbid., p. 75. 
