356 SIR SIDNEY F. HARMER ON 
Menipea fuegensis, Busk, 1852^, p. 21, pi. 19. figs. 1-3. Tierra del Fuego, Falkland 
Is. ; 1879, Phil. Trans, vol. 168, p. 194. Kerguelen. 
„ „ JuUien, 1888, Miss. Sci. Cap Horn, vi. p. 70, pi. 12. figs. 1, 2 ; 
pi. vii. figs. 8-10. Tierra del Fuego. 
Scrupocellaria fuegensis, "Waters, 1904, ' Belgiea ' Bryozoa, p. 24. Straits of Magellan. 
„ bifurcata, Kluge, 1914, p. 614, text-fig. 3. Kerguelen. 
There is some uncertainty with regard to T. aculeata and its synonyms. 
In 1879 Busk expressed the opinion that Menipea fuegensis (Busk, 1852) is 
a synonym o£ M. aculeata ; and I think this opinion is correct. The type- 
specimen (54.11.15.262) of M. fuegensis is from the Falkland Islands, and it 
is of rather coarser habit than those described and figured in the ' Challenger' 
Report ; while its scutum is linear instead of being branched. The scutum 
is- known to be variable, within the limits of a single species, or even of the 
same colony, in other Scrupocellariidse ; and the differences in question do 
not seem to be sufficient for the establishment of two species from material 
from substantially the same locality. The fertile interuodes figured by 
Jullien as M. fuegensis and by Kluge as Scrupocellaria hifurcata are very 
long, and Waters has expressed the opinion that Jullien's species should be 
considered distinct. I am inclined to regard them as different forms of a 
single species, as indicated in my synonymy. D'Orbigny's figures are 
probably not correct in all details, but some latitude must be allowed to 
observations made so long ago. All the specimens I have examined in the 
British Museum Collection, whether from the Falkland Islands, Patagonia, 
or Kerguelen, agree in the important character of having the internode 
composed of a single zooecium at its proximal end, associated with the 
existence of a single chitinous tube, instead of two tubes, in each joint. 
8. Tricellaeia longispinosa {Yanagi Sf Okada). 
Menipea longispinosa, Yanagi & Okada, 1918, Ann. Zool. Jap. ix. p. 408, pi. 6. fig. 3,. 
text-tig. 1. Japan, 312 fathoms and depth not stated. 
5. Emma, Gray. 
Emma, Gray, 1843, p. 293. 
„ Busk, 1852 ^ p. 27. 
Menipea (pars), auctt. 
Internodes very short, typically composed of two or three zooecia. Bifur- 
cation of types 13, 14 (figs. 13, 14), the two branches given off symmetrically 
or asymmetrically. Opesia reduced by an extensive development of crypto- 
cvst, sloping considerably in a basal direction. Marginal avicuhiria on the 
proximal side of the opesia, or opposite its proximal end. Scutum usually 
present, sometimes wanting. Joints conspicuous, the internodes very narrow 
proximally. 
Gray gave no generic characters, which were later described by Busk. 
Although the genus has been considered unnecessary by MacGillivray (1881, 
