Polyzoa from Queen Charlotte Islands. 255 
Mucrone..a, Hincks. 
Mucronella prelucida, nu. sp. 
Zoecia ovate, quincuncial, slightly convex, separated by 
raised lines, surface thickly covered with roundish punctures, 
lustrous ; orifice arched above, lower margin straight (no den- 
ticles) ; peristome raised, especially at the back and in front, 
where it rises in the centre into a blunt mucronate projection, 
which bends slightly inwards, the surface of the peristome 
smooth, entire, and very glossy. Avicularia none. Ow- 
cium (?). 
Loc. Houston-Stewart Channel, Queen Charlotte Islands 
(Dr. G. M. Dawson). 
Mucronella prelonga, n. sp. 
Zoecia very long, quincuncially arranged, wider above 
than at the base (elongate-ovate, sometimes appearing almost 
subtubular), convex, depressed below, rising towards the 
orifice ; surface thickly covered with punctures, shining (the 
glistening appearance due to the presence of an epitheca) ; 
orifice suborbicular, peristome elevated round it, carried out in 
front into a very prominent process, often much thrown back 
and elongated, sometimes simply pointed, sometimes bi- or 
trimucronate, on the inner side of it a single, small, sharply- 
pointed denticle; the upper margin produced in the centre into 
a sharp spinous process. Avicularia none. Occium (?) 
Zoartum forming a whitish, subcircular patch on shell. 
Loc. Queen Charlotte Islands (Dr. G. M. Dawson). 
Sitti, Hincks. 
Smittia spathulifera, n. sp. 
Zoecia large, ovate, quincuncial, moderately convex, sepa- 
rated by raised lines, surface reticulato-punctate; orifice arched 
above, lower margin straight and within it a large bifid tooth ; 
peristome raised and thickened, and produced below into a 
spout-like sinus, within which is a short spatulate avicularium, 
mandible directed downwards. Oeciwm large, immersed, 
closely united to the cell above; surface roughened, punctured 
round the edge. 
Zoarium a brownish crust on shell. 
Loc. Houston-Stewart Channel, Queen Charlotte Islands 
(Dr. G. M. Dawson). 
