460 G. M. R. Levinsen. 



Rhamphostomella plicata Lorenz, op. cit. p. 94. 



Cellepord — Hincks, Ann. Nat. Hist., 4. ser., Vol. XIX, 



p. 106, PI. XI, figs. 3, 4. 

 Rhamphostomella plicata Waters op. cit. p. 92, PI. 11, figs. 28, 29. 



— spinigera Lorenz, op. cit. p. 94. 



— plicata Nordgaard, Bryozoa 2nd Fram-Exp. p. 30, PL 



IV, figs. 49—50. 

 In one of the colonies (St. 71) a median tooth is not developed. 

 Numerous colonies on algæ, hydroids, ascidians. 

 St. 63, Stormbugt, 10—20 m. 

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

 St. 72, Danmarks Havn, 10—15 m. 

 St. 95 a, The Sound between Renskæret and Maatten, 50 — 100 m. 



Discopora plicata var. spinigera v. Lorenz. 

 (PI. XXI, fig. 1). 



To judge from the colonies examined by me, this form must be 

 regarded as a variety of D. plicata, from which it differs chiefly in 

 being provided with 2—4 oral spines and thereby that only a small 

 number of the zooecia are provided with avicularia, which in the 

 specimens examined do not differ from those found in D. plicata. 

 The frontal surface of the zooecia presents a similar fine reticulate 

 mesh-work as in D. plicata, and the median tooth has a similar 

 form as in the latter species, v. Lorenz mentions that D. spinigera 

 is provided with two small lateral teeth, but such are also found 

 in the zooecia of D. plicata and later they get covered by the peri- 

 stome as in D. spinigera. The peristome attains a similar development 

 as in D. plicata. The basal wall is in the spinigera as that of D. plicata. 



Two small colonies. 



St. 63, Stormbugt, 10-20 m. 



Discopora ovata Smitt, 

 Cellepora ovata Smitt, op. cit. 1867, Bihang, pp. 31 and 187, Tab. 



XXVIII, fig. 197. 

 Rhamphostomella ouata Osburn, op. cit. p. 245, PI. XXVI, figs. 63, 63 a. 



In opposition to all the other species of this genus, in which 

 there is only found a number of marginal pores, a larger or smaller 

 portion of the remaining frontal surface is provided with rather 

 numerous large pores, which in old zooecia are seated in deep pits 

 separated from each other by a mesh-work of strong beams. An- 

 other difference is that the ooecia have no pores, but present a more 

 or less densely nodulous surface, which is not, however, the surface 

 of the ectoooecium but that of the ooecial cover, which here con- 



