MUSEUM OF COMPARATIVE ZOOLOGY. 137 



EXPLANATION OF PLATES. 



PLATE I. 



Fig. 1. Map of Triassic area in Connecticut from Long Island Sound to the north 

 bend of tlie Farmington River, based on Percival's map in his Geology 

 of Connecticut. The numbers in circles refer to localities on the sev- 

 eral trap ridges described in the text, and in most cases figured on 

 a larger scale in later plates. See page lOi. 



Plates II. and III. contain outline maps traced from town maps in county 

 atlases, the trap ridges being sketched in black ; they cannot claim 

 much accuracy, but will probably serve as guides to the localities 

 that furnish exposures of critical contacts. 



PLATE IL 



Fig. 2. Adjacent ends of Saltonstall and Totoket Mountains. For locality 14, 



see p. 110 ; locality 15, see p. 111. 

 Fig. 3. North end of Totoket Mountain. Locality 4, see p. 107 ; locality 16, see 



p. 111. 

 Fig. 4. North end of Higby Mountain. Locality 6, see p. 107 ; locality 17 and 



17', see p. Ill ; locality 24, see p. 115. 

 Fig. 5. Chauncy Peak, south end of Lamentation Mountain, and Quarry Ridge, 



ISIeriden. Locality 7 and 7', see p. 108 ; locality 8 and 8', see p. 108 ; 



locality 19 and 10', see pp. 112, 113. 

 Fig. 6. Notch Mountain and eastern ridges of the Hanging Hills. Locality 



and 9', see p. 109 ; locaUty lU, see p. 109 ; locality 19 and 19', see 



pp. 112, 113. 



PLATE in. 



Farmington Mountain and its anterior ridge. Locality 12, see p. 109. 

 Farmington River Gap, at Taritfville. Locality 13 and 13', see p. 110. 

 Rock Falls of Aramamit River. Locality 23, see p. 114. 

 North end of Lamentation Mountain. Locality 18, see p. 112. 

 Posterior ridges to Saltonstall Mountain. Locality 20, see p. 113 ; locality 

 21 and 21', see pp. 113, 114. 



