RocTcs and Fossils of Phillipshurghj C. E. 313 



Stanbridge. The rocks of these localities appear to be higher in 

 the series than those near Phillipsburgh, and may represent some 

 portion of the Chazy. 



Cephalopoda, — Orthoceras, 7; Cyrtoceras, 3; Nautilus , 

 2. These are all undetermined but they have the aspect of the 

 Cephalopoda of the Calciferous sandrock. Some of the Orthoce- 

 ratites are slightly curved and have the septa very closely arranged. 



Crustacea. — Batliyurus Saffordi, B. Cor-dai, Amphion Sal- 

 terl Menocephalus glohosus f and a species of JLscy^/iwsarethe only 

 trilobites observed. The most abundant of these is B. Saffordi 

 which is also the dominant form at Point Levi. When I des- 

 cribed this species (this Journal Vol. 5, p. 320,) it was impos- 

 sible to determine which of the several forms of pygidium so com- 

 mon at Point Levi belonged to the glabella to which I gave the 

 name. But in the vicinity of Phillipsburgh there are several 

 localities where the pygidium figured below is common, and where 

 no other species of the genus has been found. The only glabellae 

 associated with it are those of B. Saffordi^ M. globosus, and A. Sal- 

 teri. Only one specimen of B. Cordai consisting of an imperfect 

 glabella was collected, but at a locality where no fragments of B. 

 Saffordi were observed. It seems therefore almost certain that 

 this pygidium and glabella belong to the same species. 



Fig. 1. Fig. 2. 



Fig. 1.— Glabella of B. Saffordi. 

 2. — Pygidium of the same. 



The lateral and posterior margins of the pygidium of B. Saf- 

 fondi are uniformly curved so as to form a regular semioval, the 

 proportional length and breadth of which vary somewhat but in 

 general, the former is three-fourtlis of the latter. The anterior 

 angles are rounded. The axis is convex, conical, or subcylindrical, 

 and varying from one fourth to one third the whole width of the 

 pygidium at the anterior margin. It has nine segments, but in 

 most specimens the last three are very indistinctly defined. It 

 terminates abruptly in a rounded point at one line and a half from 



