84 MR. A. W. WATERS ON 
Cape Gertrude, 30 fathoms,” the zowcia are hexagonal, granu- 
lated, having a raised avicularian chamber extending across the 
zocecium, with the avicularian opening somewhat raised and just 
within the oral aperture, but directed upwards and with a small 
round mandible. The mandible has a central lucida, but has no 
diagonal bars as in P. levis from Shetland (Pl. 11. fig. 14). 
Through the semitransparent walls of the avicularian chamber 
no avicularian glands can be seen, though no doubt, from the 
shape of the chamber, they occur at some seasons at any rate. 
The peristome is raised at each side, but is not continuous round 
the edge of the aperture. The ovicell is globular, narrow, much 
raised, with the granulations more distinct than over_the surface 
of the zocecium. 
The P. levis, var. subcompressa, Busk, may be related to P. levis 
of Fleming, but differs considerably from the Arctic P. inflata. 
The var. subcompressa is given by Kirkpatrick as found off Port 
Phillip, Australia. Although Smitt placed some adnate specimens 
from various localities under P. levis, forma lepralia, he does not 
seem in any way to have shown that there was any identity with 
the erect P. levis, Flem., and further seems to have placed two 
or three species together as P. levis. 
Loc. Spitzbergen, 20-30 fath. (Sm.); Bohus Sea; Norway; 
Finland. 
Jackson-Harmsworth Exp.: between Cape Flora and Cape 
Gertrude, 30 fath. 
43. PoRELLA? OBESA, sp. nov. (PI. 12. figs. 22-24.) 
A specimen from off Elmwood, encrusting a Balanus-shell, has a 
thick shell with finely granulated surface, and pores round the 
border which can only be seen in the younger zocecia. The 
avicularian chamber is wide, extending to the edge of the zocecium, 
but the outline can only be seen in the younger zoccia; in the 
same way the ovicell is raised in the younger zoecia, but in the 
older ones is quite depressed; and the operculum does not close 
the aperture of the ovicell. There are pore-chambers, 6-8 in all. 
The lower edge of the operculum makes a large curve, indicating 
that there is a broad sinus to the oral aperture, and there are 
two muscular dots a short distance from the border of the 
operculum. The characters of the operculum would suggest that 
the species should be placed under Schzzoporella, and near what 
we may cail the 8. biaperta group. The small avicularian ~ 
