TUNICATA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 313 
ascribed to individual variation within the limits of a species. The dorsal tubercle is 
perhaps the feature that shows most divergence, but Micaartsen himself remarks in 
the original description that it is probable that other specimens might show a different 
form of tubercle. 
Polyzoa opuntia, Lesson, subspecies coccinea, Cunningham. 
Goodsiria coccinea, Cunningham, Trans. Linn. Soc. Lond., xxvii. 
Several specimens of this common species were obtained at the Falklands :-— 
(1) Station 349, shore pools, Cape Pembroke, January 1903 to January 1904. One 
large, lobed colony and a couple of small ones. This is part of collection 
made on behalf of Scotua by Mr Pearson, Cape Pembroke lighthouse-keeper, 
during twelve months. 
(2) Station 118, rock cod trap, Stanley Harbour, 34 fathoms, January 1903. One 
elongated colony, about 26 cm. in length. 
Goodsiria (Gynandrocarpu) placenta, Herdman. 
Several specimens that seem to agree closely with this South African species were 
obtained at the Falklands, as follows :— 
(1) Station 118, Stanley Harbour, January 7, 1903. One small colony. 
(2) Station 118, rock cod trap, Stanley Harbour, 34 fathoms, January 1903. Part 
of a large colony which probably measured 10 or 12 cm. across. 
(3) Station 118, Port Stanley, 6 fathoms, February 1904. One colony measuring 
about 10 by 5 cm. 
Synstyela wncrustans, Herdman. 
(?) Alleeocarpa zschauc (Michaelsen). 
Locality.—Station 118, on hulks, Stanley Harbour, Falkland Islands. 
There are about a dozen colonies of this species, ranging in size from 1 or 2 cm. up 
to 5 or 6cm. in diameter. Most of them were adhering in masses along with the larger 
specimens of Paramolgula gregaria. 
In detailed characters these specimens agree well with the Challenger specimens of 
Synstyela incrustans obtained in the Straits of Magellan, but they also agree with 
MicHartsen’s description of Alleocarpa zschaui from South Georgia; and when 
mature, the Ascidiozooids show the male unisexual polycarps on the left, and the female 
| on the right-hand side of the mantle, which is a character of MICHAELSEN’S proposed 
| generic division Allaocarpa. As, however, he names my species Synstyela uncrustans 
as the type form of Allwocarpa, and as he apparently does not in his system retain 
Synstyela as a genus, but substitutes the name Allwocarpa for it, 1 must point out 
TRANS. ROY. SOC. EDIN., VOL. XLVIII. PART II. (NO. 16). 48 
