PALEONTOLOGIC CONTRIBUTIONS 



17 



We reproduce here the type of Grote & Pitt, our specimen which 

 shows the base, and a third specimen from the Buffalo Museum 

 which shows the occasional undulating character of the branches. 

 The specimen figured by Pohlman is very imperfect and consists 

 only of a few dichotomous basal portions. Pohlman's figure (Bui. 

 Buffalo Soc. Nat. Sci., 4:19, text fig. 6. 1881) is misleading 

 since it represents the acute broken upper edges of the rhabdosornes 

 as natural terminations. 



Inocaulis kirki nov. 



Description. Rhabdosome small (length of type specimen, 19 

 mm), bushlike, consisting of numerous rigid, rapidly bifurcating 

 branches ; the angle of bifurcation acute so that the branches appear 

 densely bushy. Width of branches, .4 to .8 

 mm; bifurcations about 3 mm apart. Sur- 

 face of branches smooth or longitudinally 

 striated, pores very minute. 



Horizon and locality. Trenton limestone, 

 Balsam lake, Victoria county, Ontario. 



Remarks, This type and other graptolite 

 material from the Trenton limestone of 

 northern Ontario was presented to the Mus- 

 eum by Dr Edwin Kirk of Washington, 

 D. C. This other material consists of bundles 

 of long bandlike striated branches of the 

 exact width and aspect of those of the type portion of 

 of Inocaulis kirki, with the differ- ri 

 ence, however, that they lack dichotomies 

 (see text figure 6). The facts, however, r h a bdos 

 that between these long bands are seen frag- 

 ments of the branching type and that the branches of the type speci- 

 men are clearly broken at their ends, indicate that the type is only 

 the basal part of a graptolite rhabdosome where rapid branching 

 took place and that more distally the branches became long, undi- 

 vided and more or less fluctuous. In the habit of the rhabdosornes, 

 the species is then comparable to Dendrograptus fluitans 

 Rued, and Strophograptus trichomanes Rued., two 

 Deep Kill graptolites. 



Airograptus (Dictyonema) furciferus Ruedemann 



Prof. E. S. Moore of State College, Pa., in 1913 sent some 

 material of a new graptolite that he had found in the Beekmantown 

 rocks of Spring Creek, near Bellefonte, Center county, Pa. The 



Fig. 5, 6 Inocaulis 



kirki nov. ■ 5 Basal 

 specimen, 

 Holotype. 

 6 Enlargement (x 18) 

 of distal part of 



