334 Mr. H. Bekker on neio Bryozoa 



Description. Fragment of the zoarium (fig. 9) is 8 mm. 

 long, t lie diameter of the cylindrical zoarium is 1*5 mm. 

 The zooeeial apertures are elliptical, with rather sharpened 

 cuds; the rows of the zooeeial apertures run more or less 

 parallel to each other, around the zoarium. In all there are 

 12 zooeeial rows. Longitudinally, within 2 mm. are 4 zooeeial 

 apertures; the apertures are 0*2 mm. wide. The zooeeial 

 apertures are separated from each other by spaces equal to, 

 or a little less than, their longer diameter. The apertures 

 have a distinct, peristome. The surface of the zoarium is 

 sculptured ; the sharpened ends of the zooeeial apertures are 

 connected by two tine ridges ; from these some transverse 

 ridges may go to the longitudinal ridges (tig. 10). These 

 longitudinal ridges run parallel between the rows of the 

 zooeeial apertures ; they are grooved above or canaliculate. 

 This tine groove is divided by numerous tine transverse ridges 

 into little squares ; little apertures sometimes occur on the 

 bottoms of these squares. 



Comparison with other Species in Esthonia. — N. bogoljubovi 

 has more numerous rows of zocecia (13, 12), whilst N. consueta 

 lias only 4 rows, N. oralis 4 or 5, N. fragilis 6, N. lineata 

 6 (or less). In addition the structure of the surface is more 

 complicated in this species. 



The trivial name is in honour of my first teacher of geo- 

 logy in Tartu (Jurjev), Professor N. Bogoljubov. 



On the table (pp. 332 &333) are marked with asterisks the 

 species of bryozoa recorded by Bass'er (1911, " Early Paleoz. 

 Bryoz. Baltic Prov.") from the Kuckers stage, and the stages 

 above or below this stage. From the Kuckers shale and 

 limestone near Jewe and Kuckers, the district in which I 

 collected, Bassler quotes 37 species (from the Kuckers stage, 

 from Jewe to Reval, Bassler quotes 46 species). Of these 

 37 species, I have found 18 in my collect ion. 



In the columns, with the exception of the third and two 

 last, are species which Bassler described among others from 

 the Glauconite, Echinosphaerite, and Jewe limestones, the 

 Wassalem bed, and the Wesenberg, Lyckholm, and Bork- 

 holra limestones. I have found these species — 16 — in the 

 Kuckers shale and marl or limestone in the quarries of the 

 villages Kukruse and Tiirpsalu. 



In the last column are marked with (x ) all the species, 

 with two new spp. and one American, which 1 found in the 

 Kuckers shale and marl or marly limestone. 



The bryozoan fauna in the Kuckers stage is very rich. In 

 a very limited locality (3 to 5 km.) I have found 37 species. 



