16 0. NORDGAARD. [2nd arc. EXP. fram 



July 22, 1900, the neighbourhood of the winter haven, incrusting 

 stones; July 19, 1901, Gaase Fjord, incrusting stones. 



In specimens from the 2nd Fram Expedition, the maudible of the 

 avicularia was unusually small (fig. 3). Smitt (1, c. p. 98) mentions that 

 in his specimens (from Greenland), on a zooecium there might be one 

 avicularium with a pointed mandible, and one with a rounded mandible. 

 Smitt has also drawn a similar one (PI. 24, fig. 73), In the specimens 

 I had to examine, there was as a rule one avicularium with rounded man- 

 dible on each side of the oral aperture, as indicated in fig. 12; but in a 

 few cases I also tound that in addition to the two avicularia at the oral 

 aperture, there was a third below the lateral oral avicularium on the 

 left side; and this third avicularium had a pointed mandible. 



There is reason to suppose that the boreal specimens that Hincks 

 examined and made drawings of, and the arctic ones that Smitt and I 

 have examined belong to the same species. It is true there are no mar- 

 ginal pores in Hincks's drawings, but these may easily be overlooked, 

 especially if the colonies are not examined with a light that falls through 

 them. Similarly Busk's Lepralia biaperta from the Crag must belong 

 to the same species. On the other hand, it is probable that Lepralia 

 linearis, var. biaperta, Waters^, and Hippothoa biaperta and diver- 

 gens, Smitt 2, should rather be removed from the boreal and arctic form 

 bearing the name of biaperta. 



Schizoporella biaperta is also known from the Miocene of Calabria^. 



27. Schizoporella, lineata, Nordgaard. 



189.5. Smittia lineata, Nordgaard, Berg. Mus. Aarb. 1894—95, No. 2, p. 27, PI. 2, 



fig. 2. 

 1903. Smittia lineata, Norman, Ann. Mag. Nat. Hist., Ser. 7, vol. 12, p. 122, PI. 9, 



figs. 14, 15. 

 1905. Schisoporella lineata, Nordgaard, Hydr. Biol. Inv. Norw. Fj., p, 167, PI. 5, 



figs. 33, 34. 



July 12, 1901, bay at Land's End on algae. 



The zooecia were 0.7 mm. in length, and 0.5 mm. in breadth; there 

 was a row of pores by the lateral walls. The median avicularium had 

 an almost semicircular mandible. I am not quite sure whether this 

 species can be maintained. It is possible that my forms come under 



' Bryozoa of the Bay of Naples. Ann. Mag. Nat. Hist., Ser. 5, vol. 3, p. 37, PI. 



11, fig. 1 & 2. 

 3 Floridan Bryozoa, part. II, p. 46, PI. 8, figs. 173—176; p. 47, PI. 9, figs. 177, 179. 

 8 See Antonio Neviani, Briozoi fossili di Carrubare, Roma, 1905. 



