PLATE XXXVIII. 



Ch^tetes fruticosus n. sp. 



Fig. 1. A strong growing stipe supporting several smaller branches. The surface, with the excep- 

 tion of the upper branches, is maculose. 

 Fig. 2. A branching form which shows several bifurcations ; the bases of the branches only being 



preserved. The remaining branches are irregularly thickened and lai'ger than the 



parent stipe below. 

 Fig. 3. An enlargement of the columns from the broken surface of one of the branches. On 



several of the cell-walls there are marks like mural pores, which, if proven to be 



such, will remove the species from this genus to Favosites. 

 Fig. 4. An enlargement from the surface, sliowing the cell-apertures with the macute marked by 



larger cells. 

 Fig. 5. A polished surface, highly enlarged, showing the cell-walls with few diaphragms except 



near the outer margins. Hamilton group, shore of Canandaigua Lake and other 



places in Western New York. 



Ch^tetes furcatus. 



(See also Plate 37.) 



Fig. 6. A small branching specimen. 



Fig. 7. A larger specimen which has had at least six bifurcations in the course of its growth. The 

 lower extremity is partially cicatrised over a broken surface, and the remainder 

 covered by a Bryozoan, a species of Callopora. 



Fig. ». A portion of the broken surface at the base of one of the branches, showing the character 

 of the columns enlarged. 



Fig. 9. An obliquely longitudinal section of a fragment, showing the cell-walls with few diaphragms, 

 except in places near the outer margin. 



This and the preceding form have many characters in common, and may ultimately 

 prove varieties of the same. The maculose surface of the first is, however, a distinct- 

 ive external feature, while under an ordinary magnifier the fractured surfaces present 

 the differences observable in figs. 3 and 8 of the illustrations. 



