30 



vided with a strongly developed peristomial thickening, the proximal part of which 

 forms an obliquely or even vertically ascending under lip. The fragments examined 

 are elongate clavate, rounded or a little compressed and accreasing gradually in 

 thickness towards the tip which is about double as thick as the proximal end. 

 The fragment to which the zooecia belong, which are figured in PI. VII (figs. 25— 26), 

 has a length of 10™™ and the thickness of the tip is 4""". 



1 think that the two specimens figured by Gregory both must be referred to 

 Mel. gracilis Goldf., but in that case they are figured in the inverted position, and 

 the supposed aperture in Gregory's figures seems to be identical with the opening 

 seen in the proximal part of my figure b and which is due to a partial destruction 

 of the frontal wall. 



Meliceritites golhica nov. nom. 



Mcliceitites gracilis Marsson (non Goldfuss), IJryoz. Rügen p, 46, pi. IV, fig. S. 



(PI. I, flgs. 11 — 141. 



The Zooecia which are divided by distinct, more or less developed marginal 

 ridges, are hexagonally rhombic, and the very concave suboral area is strongly, 

 sometimes allmost vertically ascending towards the aperture which does not take 

 up the whole breadth in the distal part of the zooecium. The tubercles are distinct 

 but developed in very different degree. The aperture which is provided with a 

 distinct peristomial thickening and a distinct, but rather narrow oral ledge has the 

 form of a gothic arch, the lateral margins in their distal part running together to 

 form a more or less distinctly angulate terminal portion while in their proximal 

 part they are somewhat converging proximally or parallel. The supraoral tubercle 

 forms a more or less developed beak-shaped projection. The convex operculum 

 is provided with a distinct flabelliform striation, and, besides, with a number of 

 small claviform projections, which are arranged in a similar manner and seem to 

 be perforated. 



The Heterozooecia are as a rule found in groups of 2 — 7, rarely singly, 

 and they larger groups are generally mixed with a number of kenozooecia. 

 They are as long as or somewhat longer than the zooecia and provided with a 

 narrow, more or less projecting aperture of very different length the lateral mar- 

 gins of which are almost parallel or very little converging distally. The fissure- 

 like opening which has a proximal triangular enlargement is bordered by two 

 obliquely descending lateral thickenings. 



Ooecia have not been found. 



The Kenozooecia which are of the same form and size as the zooecia are found 

 singly or in groups and as a rule together with heterozooecia. 



The Closure is effected by means of a flat or concave lamina (fig. 14). 



The Regeneration. There has been found both a regeneration of new zooecia 

 in old ones, of new heterozooecia in old zooecia and rarely of new heterozooecia 

 in old ones. 



