446 G. M. R. Levinsen. 



spines." The ooecium in the main-form is very small and cap-shaped 

 or very low, and presents, a little distally to the proximal margin, 

 an arch-like rib formed by the union of the two outer oral spines, 

 the ooecium in the var. spitsbergensis, on the other hand, is much 

 larger, rather high, provided with a feeble longitudinal keel, and the 

 corresponding spines are placed on each side between the ooecium 

 and the aperture. In the only zooecium which I have seen 

 provided with an ooecium, each of the two spines, the proximal 

 half of which is very high and flat, is provided with an obliquely 

 ascending and in breadth gradually diminishing distal half, which 

 meets that from the other side with its pointed end, and together 

 with it forms the anterior of the aperture. The geatest difference, 

 however, between the two ooecia is that the ooecium of the main- 

 form is represented by an independent chamber (a Kenozooecium) 

 in connection with the distal pore-chamber of the corresponding zooe- 

 cium, while that of the var. spitsbergensis is formed by the proximal 

 zooecium. In Crib, punctata, however, both forms of ooecia may 

 appear in the same colony. 



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



St. 71 a, off Cape Bismarck, 30— 40 m. 



Subordo Ascophora. 

 Fam. Hippothoidœ. 



Hippothoa hyalina L. 



Cellepora hyalina Fabricius, Fauna Groenl. p. 435. 



— nitida Fabricius, Fauna Groenl. p. 435. 



Mollia hyalina Smitt, op. cit. 1867, Bihang, pp. 16 and 109, Tab. 



XXV, figs. 84—87. 

 Schizoporella hyalina Hincks, op. cit. p. 271, PI. XVIII, figs. 8—10. 

 Diazeuxia (Cellepora) hyalina JuUien, Mission scientifique du Cap Horn, 



VI, Zoologie, 1888, Bryozoaires, p. 29 — 

 33, pi. 4, figs. 1—4. 

 Schizoporella hyalina Levinsen, "Hauch"s Togter, 1891, Polyzoa, p. 

 246-306, Tab. Ill, figs. 10—15. 

 — — Levinsen, Mosdyr, Zoologia Danica, 1894, Hefte 



9, p. 66—68, Tab. V, figs. 42—43. 

 Hippqthoa hyalina Waters, op. cit. p. 70, pi. 8, figs. 16—18. 



— — Norman, East-Finmark, Polyzoa, p. 108. 

 Numerous small colonies on algæ. 



St. 63, Stormbugt, 20-40 m. 

 St. 66, Stormbugt, 30—40 m. 



