LOCALITIES YIELDING FOSSILS. 427 



Besides these localities, there is good opportunity for opening the shales in 

 the proper horizon above the back of the anterior trap sheet in the Bradley 

 mountain block, at the outlet of the Plainfield reservoir ; and dark shales 

 were found by digging above the anterior ridge on the western slope of Rat- 

 tlesnake mountain, near Farmington, though no fossils were secured here. 

 These and other localities further north may be examined at a later date. 



Posterior Shales: 1. East Haven. — Mr. E. O. Hovey, Avhile at work on the 

 geology of the New Haven topographic map sheet last summer, found an 

 outcrop of fossiliferous black shales in a stream running into Saltonstall 

 pond from the east near its southern end. The bed lies a hundred feet or 

 more beneath the posterior trap sheet, and belongs in the Pond mountain 

 block. A number of good specimens were secured by digging into it. 



2. North Guilford. — Several years ago I found some fish scales in black 

 shales exposed in a stream near the posterior trap sheet of tlie Totoket block. 

 No opening has yet been made in these shales, but they may be provisionally 

 referred to the posterior series. 



3. Stevens. — An old locality, posterior to Paug mountain, near a shaft 

 sunk for coal, on laud belonging to S. G. Stevens, in the town of Durham. 

 No work was done here last summer, but the species previously secured are 

 entered in the list. 



4. Westfield. — The posterior shales are exposed in a stream bed, a quarter 

 of a mile northwest of Westfield village and half a mile southwest of West- 

 field station on the Berlin and Middletown railroad. These belong in the 

 Higby block, near the fault that cuts it on the northwest. They lie about 

 100 feet below the posterior trap. The locality has been known for many 

 years; a representative collection was secured from it last summer. 



5. South Bloomfield. — Black shales were found at Gillett's Mills, lying 

 posterior to the Talcott mountain range of the main trap sheet, but fossils 

 are not yet discovered here. 



6. North Bloomfield. — One mile east of Tarrifl^ville, an extensive bed of 

 black and blue shales was discovered, about 100 feet under the posterior trap, 

 in the bed of a small stream, sixty rods south of its junction with the 

 Farmington river, just above the Bloomfield and Winsor bridge. Many 

 plant impressions were found here, but no fish remains. 



The long distance from Westfield to South Bloomfield has not as yet 

 yielded any posterior black shales. 



There are black shales, sometimes fossiliferous, seen or reported at Little 

 Falls, south of Middletown reservoir, in Middlefield, at Zoar, and in Middle- 

 town, Rocky Hill and Glastonbury. Some of these appear to constitute a 

 second or higher horizon on the posterior ; but their position is not yet well 

 determined. 



