334 Mr. H. Bekker on new Bryozoa 



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

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

 The zooecial apertures are elliptical, with rather sharpened 

 ends ; the rows of the zooecial apertures run more or less 

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

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

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

 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 zooecial 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 

 zooecial apertures ; they are grooved above or canaliculate. 

 This fine 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. hogoljubovi 

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

 has only 4 rows, N. oualis 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 (Juijev), Professor N. Bogoljubov. 



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

 species of bryozoa recorded by Bassler (1911, " Early Faleoz. 

 Bryoz. Baltic Pro v.") 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 collection. 



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

 last, are species which Bassler described among others from 

 the Grlauconite, Echinosphaerite, and Jewe limestones, the 

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

 holm 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. 



