466 G. M. R. Levinsen. 



is provided with a granular ooecial cover, formed either by the 

 distal zooecium only, or also by one or two neighbouring zooecia. 

 I have only seen a peristome in the ooeciferous zooecia, where it 

 consists of a triangular-ligulate extension on each side. Only in one 

 single zooecium have I found a lateral avicularium on each side of 

 the median one. 



On a hydroid. 



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



Fam. Reteporidae. 



Retepora Wallichiana Hincks. 



Retepora cellulosa, forma notopachys, v. elongata Smitt, op. cit. 1867, 

 Bihang, pp. 36 and 204, Tab. XXVIII, figs. 226—232. 



— elongata Levinsen, Dijmphna Togtets zool.-bot. Udbytte, p. 



323, Tab. XXVII, fig. 11. 



— Wallichiana Hincks, Ann. Nat. Hist. ser. 4, Vol. XIX, p. 107, 



PI. XI, figs. 9—13. 



A number of fragments. 

 St. 63, Stormbugt, 20— 40 m. 



Lepraliella nov. gen. 



The zooecia are provided with a distinct, not beaded or faintly 

 so, vestibular arch, and with two well-developed hinge-teeth. A well- 

 chitinized operculum. Avicularia of different size and position. The 

 ooecia, the proximal portion of which is not pedicel-shaped or shaft- 

 like, have no pores and are not provided with an inwards directed 

 tongue. 



In my work on the cheilostomatous bryozoa I have pointed out 

 that the zooecia in a number of incrusting species in all essential 

 respects agree with those of the freely-branched Reteporidae, and that, 

 therefore, these species must be referred to the latter, and the same 

 holds good also for the two species described by Smitt respectively 

 as Lepralia hippopus and Cellepora ramulosa, forma contigua. Pro- 

 visionally I refer both of them to the above genus Lepraliella, but 

 it is possible that a thorough systematic investigation of the family 

 Reteporidœ will make it necessary to refer each of them to a distinct 

 genus. 



Lepraliella hippopus Smitt. 



Lepralia hippopus Smitt, op. cit. 1867, Bihang, pp. 20 and 127, Tab. 

 XXVI, figs. 99—105. 



