190 BULLETIN OF THE ESSEX INSTITUTE. 



M. Balch and described in the American Journal of Sci- 

 ence and Arts, Vol. xxxiii, p. 198, should undoubtedly 

 be referred to Allanite. 

 No. 77. Orthite. 



Found in radiated crystals in the hornblende-biotite- 

 granitite at the quarry of the Rockport Granite Co., Rock- 

 port. 

 No. 78. Zoisite. 



This occurs in fine blue crystalline masses in the zoisite- 

 gneiss and the hornblende-epidote-gneiss at Andover, 

 Georgetown and Newbury. 

 No. 79. Iolite. 



Found in corderite-gneiss at Marble Ridge, North An- 

 dover. 

 No. 80. Phlogopite Mica. 



In granitite, Rockport. 

 No. 81. Biotite Mica. 



In augite-syenite, Salem Neck and Beverly, and also in 

 granitite at Rockport. 

 No. 82. Lepedomelane. 



Found in hexagonal plates of a bronze color in the 

 Pomeroy quarry, Gloucester. 

 No. 83. Astrophyllite. 



In the quarry of the Rockport Granite Co., Rockport. 

 No. 84. Muscovite Mica. 



Common in the biotite-muscovite-granite at Andover, 

 Methuen and Rowley. 

 No. 85. Lepidolite : Lithia Mica. 



In mica schist at Ballardvale, Andover, Bradford and 

 Methuen ; in the mica schist at Ward's Hill, Bradford. 

 No. 86. Cryophyllite. 



In the hornblende-biotite-granitite at Rockport. 

 No. 87. Annite. 



Found, as the last. 

 No. 88. Sericite. 



