THE HEDERELLOIDEA — BASSLEB 65 



HERNODIA CORNUCOPIA, new species 



Plate 15, Figure 7 



At first sight this well-developed species appears far removed from 

 the genotype, but upon tracing the method of branching and the type 

 of budding it is apparently a Hernodia, differing from typical species 

 in that the branches are composed of tubes in close contact but aris- 

 ing in the normal manner on alternate sides from the midlength of the 

 preceding tube. Although the type specimen is almost a solid mass 

 of closely arranged tubes, branching occurs at intervals of about 10 

 mm. and at angles of about 45°, each branch starting with a single 

 tube and, by its subdivision, increasing to a width of 10 mm., exhib- 

 iting 10 rows of zooecia before another bifurcation occurs. Each 

 zooecium is distinctly horn-shaped, 3 to 4 mm. in length, and 1.3 mm. 

 in width at its distal end, budding at such a low angle from the pre- 

 ceding one as to remain practically in contact. The apertures are ter- 

 minal and elliptical; surface marked with very delicate transverse 

 lines widely spaced. 



Occurrence. — Middle Devonian (Traverse-Genshaw formation): 

 Long Lake, Alpena, Mich. 



iJoZofype.— U.S.N.M. No. 87886. 



HERNODIA ULRICHI. new species 



Plate 16, Figure 8 



Although evidently related to the genotype in method of budding 

 and branching, this new species, named in honor of Dr. E. O. Ulrich, 

 is separated at once by its smaller dimensions, the zooecia averaging 

 only 3.5 mm. in length and 0.8 mm. in width. Furthermore, the 

 zooecia expand more rapidly and bud at a greater angle (40°), while 

 the branches subdivide at intervals of about 5 mm. at angles of more 

 than 45°. 



The type specimen, preserved as a sUiceous cast of the interior, 

 shows the specific characters very well, but a better-preserved exam- 

 ple would form a most interesting fossil. 



Occurrence. — Onondaga (Upper Jeffersonville limestone-zS'^myer acu- 

 minatus bed): Falls of the Ohio. 



Holotype.—U.S.'N.M. No. 54128. 



HERNODIA TENNESSEENSIS, new species 



Plate 15, Figure 1 



Gutta-percha impressions of the type specimen, which is repre- 

 sented by an excavation in the base of a massive stony bryozoan, in- 

 dicate a well-marked species that can be referred to only as a Hernodia 

 with long zooecial tubes much narrowed in the proximal portion 



