Вглогоа. 467 



Lepralia hippopus Hincks, op. cit. p. 309, PI. XXXIII, figs. 8, 9. 

 (PL XXII, figs, to, 11, 12, 13, 14). 



The zooecia whicli consist of a hard, thick, glistening calcareous 

 substance and rarely present 1 — 4 fairly long oral spines are more 

 or less regularly hexagonally rhombic and separated from each other 

 by distinct sutures. The moderately convex wavy nodulous surface 

 is provided with 6 — 8 marginal pores, and the elongate aperture 

 which is contained thrice in the length of the zooecium is placed 

 a little proximally to the distal end. It is twice as long as broad, 

 and the lateral margins are faintly converging towards the some- 

 what concave proximal margin. A distinct, but fairly low, rarely 

 indistinctly beaded vestibular arch and two roundedly triangular 

 hinge-teeth are found. Also a well-chitinized yellow operculum 

 provided on each side with a longitudinal ridge is found, which 

 serves both for the attachment of the opercular muscles and for 

 connection with the hinge-teeth. Very often a small round projection 

 is found proximall}^ to the aperture. The pore-chambers, of which 

 two are found in the distal 1 wall and one in the distal half of each 

 lateral wall, are small, narrow and provided with a few pores. 



In a larger or smaller number of zooecia there is found an ovate 

 avicularium varying in size, but rarely attaining the size of the aper- 

 ture. It is in connection with one of the marginal pores and placed 

 on one side of the aperture near to the margin either in the distal 

 or the proximal portion of the zooecium. 



The ooecia, which are two-layered in their whole extension and 

 the basal halves of which are immersed in a niche-like cavity, are 

 about as long as broad, very convex, and surrounded by an ooecial 

 cover rising partly from the lateral portions of the proximal zooecium 

 itself, partly from the surrounding zooecia, and the wavy-nodulous 

 surface of this ooecial cover therefore presents 3-5 suturai lines. In 

 such zooecia, which are destined to get ooecia, there is seen distally 

 to the aperture a very small, nearly semi-elliptical opening leading 

 into a small blind cavity. From the distal, convex margin of this 

 opening the ectoooecium takes its origin, while the endoooecium rises 

 from the proximal margin, and thence the ooecium expands round 

 the distal half of the aperture. 



Not a few colonies incrusting stones. 



St. 63, Stormbugt, 20— 40 m. 



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



Lepraliella contigua Smitt. 

 Cellepora ramiilosa, forma contigua Smitt, op. cit. 1867, Bihang, pp. 

 31 and 189, Tab. XXVIII, figs. 198-210. 



