THE HEDERELLOIDEA — BASSLER 45 



HEDERELLA NODIFERA, new species 



Plate 12, Figure 3 



A species with the same general features as H. nicholsoni and H. 

 thedfordensis but with more frequently divided and crowded branches 

 and particularly with a nodelike swelling near the extremity of each 

 zooecium. Division at very acute angles for both branches and 

 zooecia bringing them almost in contact; individual zooecia 3 mm. 

 long and 0.6 mm. wide normally, but 1 mm. across at a node. The 

 node or swollen part of the tube occurs regularly about one-quarter 

 of a tube length behind the aperture. Its cause is unknown, as the 

 type, the only known specimen, gives no clue. 



Occurrence. — Helderbergian (Birdsong shale): Perry ville, Tenn. 



Holotype.—{].S.l<lM. No. 87968. 



HEDERELLA QUEBECENSIS, new species 



Plate 13, Figure 9 



This species resembles H. thedjordensis in its general measurements 

 and method of branching but differs in the conspicuous clusters of 

 zooecia developed on alternate sides at regular intervals of about 4 mm. 

 with few intermediate single tubes. Gutta-percha impressions of the 

 type, which occurs as a mold in a brachiopod shell, show the tubes to 

 average 2 mm. in length and 0.6 mm. in width, with 5 or 6 to a cluster. 



Occurrence. — Devonian (Gaspe sandstone): Near Gaspe, Quebec, 



Holotype.—U. S.'^.M. No. 94568. 



HEDERELLA HELDERBERGIA. new species 



Plate 8, Figure 3 



The type and only specimen so far discovered incrusts a brachiopod 

 shell and consists of several parallel primary branches emitting at 

 intervals of 4 or 5 mm. secondary branches at such an angle as to 

 form a latticework ensemble. From both the main and secondary 

 branches slightly curved zooecial tubes 2 mm. long and 0.35 mm. wide 

 arise at angles of approximately 45° and about 1 mm. distant from 

 each other, with about 3 zooecia in 5 mm. The secondary branches 

 usually end in a tuft of 4 or 5 zooecia, which, with the latticelike 

 arrangement of the primary and secondary branches, give a charac- 

 teristic aspect of regularity to the species. 



Occurrence. — Helderbergian (New Scotland limestone): Schoharie 

 County, N. Y. 



Holotype.—V. S.^.M. No. 26032. 



