CELLULAEINE AND OTHEB POLYZOA. 347 
zooecium and directed more or less basally ; concealed beneath the proximal 
cryptocyst in frontal view. Marginal avicularia (fig. 23), on the marginal 
zocecia, small, with a deep cavity excavated in the distal part of the outer 
calcareous wall. Basal surface of zooecia moderately constricted laterally, 
the terminal wall showing one, two, or even three blister-like pore-chambers 
projecting into the proximal zocecium, close to the basal wall. A con- 
spicuous pore-chamber giving off a rootlet at the proximal end of each 
marginal zooecium, situated just distally to the marginal avicularium. A 
single basal heterozooecium (fig. 38) sometimes present at the angle of the 
bifurcation, its rostrum narrow and elongated distally. Ovicells without 
distinct thickening bars, the free edge of the ectocBcium forming a rounded 
curve, passing near the sides and distal margin, and not giving rise to a 
nmcro. Operculum distinct and Membraniporiform, without basal sclerite, 
but with well-marked lateral, triangular, occlusor flanges. 
Described from three specimens in the British Museum Collection, all 
from New Zealand :— Hincks Collection, 99.5.1.630 (Type) and 458 (labelled 
Menibranvpo7'a rohorata) ; Busk Collection, 99.7.1.703 (labelled Menipea 
niultiseriata). 
This interesting species would be referable to Craspedozoum if that genus 
were recognized as distinct. In the presence of internal avicularia it 
agrees with the other three species which were placed in that genus by 
MacGillivray. But this feature allies the Craspedozoum group with typical 
species of Menipea such as Al. triseriata and M. marionensis, while C. spicatum 
shows a further agreement with Menipea in the character of its jointing. 
The present species, in retaining a single basal heterozooecium at the bifur- 
cation, indicates that these structures form a part of the original inheritance 
of the genus, as in other genera of Scrupocellariidje, and notably Amastigia 
and JYotoplites. The presence of marginal avicularia, which I have not 
found in other species of Craspedozoum, is a further feature of interest. 
13. Menipea multiseriata. Busk. 
Menipea mtdtiseriuta, Busk, 1852 ^, p. 22, pi. 60. figs. 1, 2. New Zealand. 
Unilaminar, multiserial, jointed, bordered by marginal groups of rootlets^ 
the number of series of zocEcia at least 8. Basal walls of the zooecia hardly 
contracted laterally. Spines 1, 1. Ovicells closely resembling those of 
M. roborata. Frontal avicularia 2 on the median zooecia, the rostrum 
directed obliquely proximally ; two constantly present on the distal side of an 
ovicell, the rostrum directed nearly transversely outwards ; one on the 
marginal zooecia. A small lateral avicularium on the marginal zooecia. 
Busk considered this species nearly allied to M. triseriata, and possibly a 
variety of it. The locality was said to be unknown by him. The type-slide 
(99.7.1. 112. D) was not returned to the Museum on the completion of the 
Catalogue, but it came later, with the remainder of the Busk Collection 
