THE HEDERELLOIDEA — ^BASSLER 55 



HEDERELLA REIMANNI. new species 



Plate 12, Figure 8 



Although of large proportions, this giant species is so similar to such 

 minute but typical forms as H. concinna that there can be no doubt 

 of its correct reference to Hederella. In H. reimanni the zooecial 

 tubes are about 4 mm. long and 1.0 mm. wide, with about 1 in 5 mm., 

 budding at such an acute angle as to nearly remain in contact, with 

 zoarial branching at 10-mm. intervals, thus making this the largest 

 Hederella known. 



The specific name is given in recognition of the researches of 

 Irving G. Reimann, of the Buffalo Society of Natural History, on the 

 geology of western New York. 



Occurrence. — Middle Devonian: Bay View (holotype) and 18-Mile 

 Creek (Wanakah shale), and Pavilion (Tichenor limestone), N. Y.; 

 2% miles southwest of Sylvania, Ohio (Silica shale). 



Holotype.--\J.S.l<iM. Nos. 93963, 93967. 



HEDERELLA HIBBARDI, new species 



Plate 4, Figures 3, 3' 



The zoarium in this species occurs as a thick mat of large, broad 

 zooecial tubes in close contact, which when analyzed shows the 

 characteristic branching of this section, differing from such species 

 as H. robusta in that the zooecia are less in length (2.5 mm.) and in 

 width (0.7 mm.). Branching occurs at short intervals, averaging 

 perhaps 4 mm., but at such an acute angle (20°) that the branches are 

 usually in contact; 2)^ to 3 zooecia may be measured in 5 mm. 



The specific name is in honor of Raymond R. Hibbard, of Buffalo, 

 N. Y., well-knoMm student of the Bryozoa and Middle Devonian 

 faunas. 



Occurrence. — Hamilton (Arkona shale): 1 mile east of Marshs 

 Mills and Arkona, Ontario. 



Holotype and paratype. — U.S.N.M. No. 87967. 



HEDERELLA PARALLELA GROUP 



In the eight species classified under this heading the zooecia bud 

 at such a low angle from the main axis that they usually remain in 

 contact throughout the greater part of their length, thus giving the 

 aspect of parallel arrangement. 



HEDERELLA PARALLELA, new species 



Plate 2, Figures 1-2' 



Hederella canadensis Hall and Simpson, Pal. New York, vol. 6, pi. 65, fig. 3, 

 1887. — Grabau and Shimeb, North Amer. Index Foss., p. 120, fig. 179b, 

 1907. 



