TUNICATA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 95 



ascribed to individual variation within the limits of a species. The dorsal tubercle is 

 perhaps the feature that shows most divergence, but MICHAELSEN 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. Land., 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 Scotia by Mr PEARSON, Cape Pembroke lighthouse-keeper, 

 during twelve months. 



(2) Station 118, rock cod trap, Stanley Harbour, 3 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, 3^ 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 incrustans, Herdman. 



(1) Allaeocarpa zschaui (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 6 cm. 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 

 MICHAELSEN'S description of Allceocarpa 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 Alloeocarpa. As, however, he names my species Synstyela incrustans 

 as the type form of Allceocarpa, and as he apparently does not in his system retain 

 Synstyela as a genus, but substitutes the name Alloeocarpa for it, I must point out 



(ROT. soc. EDIN. TBANS., VOL. XLVIII., 313.) 



