Natural History of East Finmark. 113 



1868. Porella Icevis, Sniitt, partim, " Kritisk Forteckniug, &c." pt. iv. 



p. 21, and in description of plate " Lepralia apprta, Boeck,' 



tigs. 112-113. 

 1900. Porella inflata, Waters, " Biyozoa Franz-Josef Land," Journ. 



Linn. Soc, Zool. vol, xxviii. p. 83, pi. 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 

 l(Bvis," and others collected by Principal Dawson in Gaspe 

 Bay, Gulf of St. Lawrence. 



5.2. Porella struma (Norman). 



Svserholt {Nordgaard). I did not myself meet with this 

 species in East Finmark. Specimens in my collection are 

 from Shetland, Greenland, Gulf of St. Lavvrence ; "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 Vadso in company with 

 CribrUina cryptocecium, Norman, and Harmeria scutulata, 

 Busk ; also in Bog and Lang Fiords, 0-3 fathoms. 



Porella minuta has very small zooecia, which are arranged 

 in unusually regular lines radiating from the centre of the 

 colony. Zooecia 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 zooecia below the lip indicative of the avicu- 

 lariau cell. Ooecium semiglobose, imperforate. Li old 

 specimens there is some filling up of the spaces between the 

 parallel lines of zooecia, which are often bridged over by bars 

 of calcareous growth (see Hincks, pi, xxix. fig. 1), 



The Vadso specimens, Avhich agree in every other respect, 

 differ from those previously in my collection in having the 

 surface of the zo(Ecia ornamented with slightly raised lines 

 converging from the sides; similar to the common condition 

 of the zooecia in Escharella immersa. 



A7171. cD Ma(/. X. Hist. Scr. 7. Vol. xii. 8 



