TUNICATA OK THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 1)5 



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

 perhaps the feature that shows most divergence, but MICHAGLSEN 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, Tran.<. Linn. *'>,. /.,,/., xxvii. 



Several specimens of this common species were obtained at the Falkland* : 



(1) Station 349, shore pools, Cape Pembroke, .January 1903 to January 11)04. One 



large, lobed colony and a couple of small ones. This is part of collect inn 

 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 2G cm. in length 



Goodsiria (Gynandrocaiy) j>/<ti-fni<t, Herd man. 



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, M} 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, Herd man. 



(1) Altosocarpa zsrhatii (Mirliaclseii). 



Locality. Station 118, on hulks, Stanley Harbour, Falkland Islands. 



There are about a dozen colonies of this species, ranging in si/.e 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 Pwra/molgula gregana. 



In detailed characters these specimens agree well with the Challenger specimens of 

 Si/ux/i/ela incrustans obtained in the Straits of Magellan, but they also agree with 

 MICHAELSEN'S description of Allceocarpa zsrlnnii from South Georgia; and when 

 mature, the Ascidiozooids show the male unisexual polycarps mi the left, and the female 

 on the right-hand side of the mantle, which is a character of MICHAKI.SKN s proposed 

 generic division Allceoc<trp<(. As, however, he names my species Synstyr/n inn-uxi'in* 

 as the type form of Allceoc<iri>. and as he apparently does not in his system retain 

 Synstyela as a genus, but substitutes the name Allceocarpa for it, 1 must point out 



(ROY. SOC. EDIN. TKANS., VOL. XI.V1II., 313.) 



