Bryozoa. 441 



Membranipora arctica \. Lorenz, Bryozoen von Jan Mayen (Die in- 

 ternationale Polarforschung 1882—83, 3 В.), p. 

 3, Taf. 7, flg. 1. 



— — Waters, Journ. Linn. Soc. Zoology, p. 60. 



— — Osburn, Bulletin Bureau of Fisheries, vol. 30, 



p. 229, pi. 23, figs. 33—34, pi. 30, fig. 86. 

 Callopora Sophiœ Norman, Annals Nat. Hist., Ser. 7, Vol. XI, p. 590. 



A number of small colonies from algae and stones. 



Stat. 63, Stormbugt, 20— 40 m. 



Stat. 66, Stormbugt, 30—40 m. 



Stat. 71, off Cape Bismarck, 30 — 40 m. 



Stat. 72, Stormbugt, 30 m. 



Membranipora (Callopora) trifolium S. Wood. 



Membranipora Flemingii, forma trifolium Smitt, op. cit. 1867, pp. 367 



and 405, Tab. XX, figg. 37-42. 



— trifolium Hincks, op. cit. p. 167, PI. XXII, figs. 5, 6. 

 Amphibiestrum — Norman, Annals Nat. Hist., Ser. 7, Vol. XI, 



p. 597, PI. XIII, fig. 6. 



Two colonies of the variety quadrata. In one of them, of which 

 there are only a few zooecia left, is seen an ancestrula with a highly 

 convex frontal surface, in the distal half of which is seen a circle 

 of 10 spine-marks, surrounding not onl}^ a very small opening pro- 

 vided with a concave proximal margin, but also a descending crypto- 

 cyst of a similar size. 



St. 71a, Stormbugt, 30— 40 m. 



St. 15, Lat. 76° 35' N. Long 18° 26' W., 150 m. 



Membranipora (Callopora) spathulifera Smitt. 



Lepralia spathulifera Smitt, op. cit. 1867, Bihang, pp. 20 & 124, pi. 



XXVI, figs. 94—98. 

 Microporella — Waters, op. cit. p. 87, pi. 12, fig. 6. 

 Doryporella — Norman, Annals Nat. Hist. 7. S., Vol. XII, 1903, 



p. 106. 

 Callopora — Levinsen, Cheilost. Bryozoa 1909, p. 151. 



Lepralia — Osburn, Proc. U. S. Nat. Museum, vol. 43, 1913, 



p. 282, PI. XXXIV, figs. 2, 2 a and 2 b. 

 (PI. XIX, figs. 8, 9, 10). 



By the earlier authors this interesting species has been referred 

 to three different genera of the division for which I have proposed 

 the name Ascophora; but in my work on the cheilostomatous Bryozoa 



