Natural History of Hast Finmark. 113 
1868. Porella levis, Smitt, partim, “ Kritisk Forteckning, &e.” pt. iv. 
p. 21, and in description of plate “ Lepralia aperta, Bueck,” 
figs. 112-113. 
1900. Porella inflata, Waters, “Bryozoa Franz-Josef Land,” Journ. 
Linn. Soc., Zool. vol. xxviii. p. 83, pl. x. figs. 6, 7. 
Waters appears to have overlooked the fact that this 
species had been described by Boeck, whose type Smitt had 
figured. 
Lang Fiord. I have also in my collection specimens from 
Spitsbergen given me by Smitt under the name “ Porella 
levis,” and others collected by Principal Dawson in Gaspé 
Bay, Gulf of St. Lawrence. ; 
52. Porella struma (Norman). 
Sveerholt (Nordgaard). I did not myself meet with this 
species in Hast Finmark. Specimens in my collection are 
from Shetland, Greenland, Gulf of St. Lawrence; “ Cashes 
Ledge,” N.E. America, as “Eschara verrucosa (cervicornis) ?,” 
from U.S. Nat. Mus.; and Bergen and Hardanger Fiords, 
Norway, where I found it to be not uncommon. 
53. Porella minuta (Norman). 
On stones between tide-marks at Vads6 in company with 
Cribrilina cryptoecium, Norman, and Harmeria scutulata, 
Busk ; also in Bog and Lang Fiords, 0-3 fathoms. 
Porella minuta has very small zocecia, which are arranged 
in unusually regular lines radiating from the centre of the 
colony. Zocecia imperforate, more or less minutely granular, 
moderately raised; oral opening rounded above, straight at 
the sides, and straight lower lip (unless, as sometimes is the 
case, interrupted by the avicularium) ; the avicularium with 
rounded mandibles either within the oral opening, when a 
tooth-like process appears in front of it, or situated on the 
lip itself, and in the latter case more markedly there is a 
swelling on the zocecia below the lip indicative of the avicu- 
larian cell. Ocecium semiglobose, imperforate. In old 
specimens there is some filling up of the spaces between the 
parallel lines of zocecia, which are often bridged over by bars 
of calcareous growth (see Hincks, pl. xxix. fig. 1). 
The Vads6 specimens, which agree in every other respect, 
differ from those previously in my collection in having the 
surface of the zocecia ornamented with slightly raised lines 
converging from the sides; similar to the common condition 
of the zocecia in Escharella immersa. 
Ann. & Mag. N. Hist. Ser. 7. Vol. xii. 8 
