CONTENTS. 



On the Species of the Gfcenus Chalcinus in the Museum of Com- 

 parative Zoology at Cambridge, Mass., U. S. A., by Samuel 



Garman, 1 



On Species of Gasteropelecus, by Samuel Garman, ... 8 



On Species of Cynopotamus, by Samuel Garman, ... 11 



On the Species of the Genus Anostomus, by Samuel Garman, . 15 



The Mouth-Parts of the Thysanoptera, by H. Garman, . . 24 



A New Fresh- Water Crustacean, by H. ^Garman, . . . 28 



The Stratified Bocks of Essex County, by John H. Sears, . 31 



On a Genus and Species of the Characines, by Samuel Garman, 49 



On Balistes Vetula Linne, by Samuel Garman, . . . . 53 



Silurus (Parasilurus) Aristotelis, by Samuel Garman, . . 56 



On the " Gila Monster," by Samuel Garman, .... 60 



The Difference between the Geographic Turtles, by H. Garman, 70 



A Lost Paper on Hugh Peter, communicated byR. S. B., . 84 

 A Study of Summer Ceremonials at Zuni and Moqui Pueblos, by 



J. Walter Fewkes, . 89 



Annual Meeting, Monday, May, 1890, 115 



Officers elected, 116 ; retrospect of the year, 116 ; field meet- 

 ings, 117; meetings, 123; library, 136; cabinets, 151; treas- 

 urer's report, 153 ; necrology of members, 154. 



