456 G. M. R. Levinsen. 



on both sides or on one side only a rudimentary triangular ooecial 

 cover rising from the corresponding neighbouring zooecium. Accord- 

 ing to Smitt's fig. 36, there may sometimes be found in this species 

 an ooecial cover similar to that found in S. arclica. A few small colo- 

 nies on algæ. 



St. 63, Stormbugt, 20—40 m. 



St. 69, Stormbugt, 20— 30 m. 



St. 72, Danmarks Havn, 10 — 15 m. 



Smittina minuscula (Smitt) Nordgaard. 



Esçharella porifera, forma minuscula Smitt, op. cit. 1867, Appendix, 



p. 9 & 70, pi. 24, figs. 33—35. 

 Smittia arctica Norman pp., Trondhjem Fiord, Annals Nat. Hist. 



S. 6, vol. 13. p. 128. 

 — — Nordgaard p. p., Norges marine Polyzoa, Bergens 



Mus. Aarbog 1894—95, п. 2, p. 27, pi. 1, fig. 2. 

 Smiitia Landsborovii, var. Waters Bryozoa Frantz Josef Land (Journ. 



Linnæan Soc, Zoologia, Vol. XXVHI, p. 90, pi. 



12, fig. «7. 

 Smittia arctica Nordgaard, Die Bryozoa d. westl. Norwegen, 



Meeresfauna von Bergen, p. 90, pi. 1, figs. 16 — 18. 

 Smittina minuscula Nordgaard, Bryozoa from the 2nd Fram Expedi- 

 tion 1898—1902, 1906, p. 28, PI. Ill, figs. 46 and 47. 

 (PL XXI, figs. 15, 16). 



The zooecia have the whole surface provided with numerous 

 fairly large pores, separated from each other by a prominent in- 

 distinctly nodulous mesh-work. The secondary aperture is nearly 

 semi-elliptical, and the primary aperture, which has no distinct sinus, 

 is provided with a low but fairly broad trapeziform median tooth 

 and two lateral teeth, the rounded ends of which are not much pro- 

 jecting and sometimes concealed by the peristome. The faintly 

 chitinized operculum has no longitudinal ridges. The well-devel- 

 oped peristome is formed in the ooeciferous zooecia by two different 

 portions, a lower portion which rises from the avicularian chamber 

 on eaeh side of the transverse bar, and a higher portion rising 

 from the adjacent margins of the two neighbouring zooecia. The 

 latter consists of two irregular triangular plates which decrease in 

 breadth distally and coalesce in the middle line, thus forming a 

 transverse belt across the proximal portion of the ooecium. The 

 convex or saddle-shaped distal wall is on each side provided with 

 a single-pored rosette-plate, and in the distal half of each lateral лvall 

 with 2 — 3 single-pored pore-chambers. 



