39 



with a strongly developed peristoinlal thickening. There is found a distinct, but 

 narrow oral ledge, and the lateral margins as a rule converge a little proximally. 

 The convex operculum is provided with a flabelliform striation. 



The Heterozooecia, which in most fragments are found in a number of 2 — 10 

 either singly or two together are as a rule not spread among the zooecia, but to- 

 gether with the kenozooecia form a longitudinal belt which lakes up about the 

 third part of most fragments examined. They have a similar form and size as the 

 zooecia, but are provided with a triangular distally rounded aperture, not twice as 

 long as broad, the length of which is contained about three times in the length of 

 the whole heterozooecium. It is provided with two lateral thickenings. 



The Kenozooecia which have the same form and size as the zooecia together 

 with the heterozooecia form transverse series, each containing 3 (2 — 4) zooids. 



Ooecia have not been found. 



The Closure is effected by means of a concave lamina. 



The Regeneration. I have seen a regeneration of new zooecia in old ones, and a 

 corresponding regeneration of heterozooecia. 



The Colonies (Diam. 0,8— 1 mm.) are incomposite, and the cylindrical fragments 

 have their zooids arranged, in regular transverse series, which, however, in most 

 cases are more or less oblique. The zooecia which as a rule are bordered by 

 parallel lateral margins in the larger part of their length, generally are found in a 

 number of six in each transverse row, but in rare cases the extension of the long- 

 itudinal belt formed by the kenozooecia and heterozooecia may be diminished by 

 the increase of the number of zooecia in one or more transverse series, and some- 

 times it may even be divided in more parts, one or more transverse series forming 

 closed rings round the branch. — 



Numerous specimens from Faxoe and Rejstrup (Danian), Denmark. 



Meliceritites Steenstriipi Pergens. 



Hornera Steenstrupi Pergens (partim), Bryoz. de Faxe, p. 218, pi. XIII, figs. 3, 4. 



(PI. Ill, figs. 12, 13.) 



The Zooecia (long. 0,5 mm.) which are divided by well-developed marginal ridges 

 are in most cases more than twice as long as broad, and the suboral area is 

 obliquely ascending towards the aperture which together with the well-developed 

 peristomial thickening takes up allmost the whole breadth in the distal part of the 

 zooecium. No tubercles. The half-elliptical aperture lacks a distinct oral ledge, and 

 its length is contained about two and a half time in that of the zooecium. The 

 not very convex operculum shows a flabelliform striation. 



The Heterozooecia which are much smaller than the zooecia and generally of 

 an elongate sexangular form are never spread among the latter but together with 

 a few kenozooecia form a longitudinal belt, which takes up a fourth to a sixth 

 part of the extension of the fragments examined, and in which the zooids are arran- 



