CELLTTLAEINK AND OTHER POLYZOA. 341 
4. Menipea patagonica, Busk. 
Menipea patagoyiica, Busk, 1852 =, p. 22, pi. 23. fig. 1 ; pi. 25. figs. 1-3 ; pi. 26. 
figs. 1, 3. Falkland Is., Patagonia. 
Menipea patagonioa, JuUien, 1888, Miss. Sci. Cap Horn, vi. p. 71. Tierra del Fuego. 
? Scrupoedlaria patmjonica, Kluge, 1914, p. 615, text-fig. 4. Kerguelen. 
Internodes commonly consisting o£ six zooecia. A single spine typically 
present on each side, or two on the outer side, distally. Marginal avicularia 
well developed, frontal avicularia small. 
5. Menipea marionensts, Busk. (PL 17. fig. 22 ; PI. 19. figs. 43-45.) 
Menipea marionensis (pars), Busk, 1884, p. 21, pi. 4. figs. 3, 3 « (specimens from 
Stat. 142, Cape of Good Hope, 1-50 fathoms, only). 
Branches mainly biserial^ the axillary zocecium sometimes preceded by a 
more proximal median zooecium. Internodes usually of 3-5 pairs of zooecia, 
in addition to the median zooecium or zooecia, but sometimes with a larger 
number, particularly in those with ovicells. Zooecia facing obliquely 
outwards, from a raised keel passing down the middle of the branch. Opesia 
nearly oval, but distinctly wider distally, the cryptocyst more developed 
proximally than elsewhere. Strong calcareous spines given off basally from 
the edge of the cryptocyst, in young zooecia, becoming more numerous with 
increased age, and some of them directed frontally. Spines usually two 
external and one internal, often one on each side, the external spine the more 
distal. Scutum wanting. Frontal avicularia single on most of the zooecia, 
the rostrum directed obliquely proximally ; not quite reaching the opesia. 
Two symmetrically placed frontal avicularia may occur on the axillary 
zooecium, where two median zooecia are present. Frontal avicularia of the 
usual type may be replaced by internal avicularia (PI. 17. fig. 22 ; PI. 19. 
figs. 43, 44), situated in the body-cavity. Marginal avicularia moderate, 
constantly present. Vibracula and basal avicularia wanting. Ovicells very 
short, wider than long. At the bifurcation (fig. 22) both branches are 
jointed, the distal end of the parent-internode being prolonged beyond the 
axil like the base of a tuning-fork. The joints are thus at some distance 
from the axil and traverse the proximal end of the opesia of each inner 
zooecium. Zooecia F and G meeting in a long median suture on the basal 
side of E. 
The material which was described by Busk as M. marionensis included two 
very distinct species, as has been explained above (p. 336), under Amastigia 
kirkpatricki. The ' Challenger ' specimens (Brit. Mus.) referable to Af. manon- 
ensis are four slides, 87.12.9.94, 95 and 99.7.1. 698, 699, all from Stat. 142 ; 
8J.12.9.94 being marked as the type. 
In examining the spirit material of Menipea triseriata obtained by the 
' Challenger ' from Simon's Bay, Cape oE Grood Hope, I found a frag- 
ment of another species, the original of my figs. 22, 43, and 45 of this 
LINN. JOUKN. ZOOLOGY, VOL. XXXV. 25 
