CONTENTS. 



PACE 



LIMITATION OF THE FAMILY ASTACID^E ......... 1 



DIAGNOSIS OF THE FAMILY ASTACID^E . ....... 1 



DIVISION OF THE FAMILY INTO TWO SUBFAMILIES, POTAMOBIIN.E AND PARASTACIN^E 2 



DIVISION OF THE POTAMOBIIN^E INTO TWO GENERA, CAMBARUS AND AsTACtJS . 2 



THE GENUS CAMBARUS 3 



BIBLIOGRAPHY OF THE GENUS CAMBARUS FROM THE YEAR 1868 TO THE PRES- 

 ENT TIME . . . 4 

 NOTICE OF HAGEN'S MONOGRAPH OF THE NORTH AMERICAN ASTAGTD^E . 8 

 HAGEN'S NOTES ON THE TYPES OF ERICHSON'S AND DE SAUSSURE'S SPECIES 



OF CAMBARUS IN THE BERLIN MUSEUM 9 



NOTICE OF THE EXTANT TYPES OF CAMBARI DESCRIBED BY AMERICAN AUTHORS 



BEFORE THE DATE OF HAGEN'S MONOGRAPH 10 



ON THE TWO FORMS OF THE MALE IN THE GENUS CAMBARUS ... 12 



INDICATIONS OF UERMAPHRODITISM IN CAMBARUS 12 



PECULIARITIES OF THE YOUNG STAGES OF CAMBARUS 15 



RANK OF THE SUBFAMILIES POTAMOBIIN^E AND PARASTACIN^E, AND OF THE 



GENERA CAMBARUS AND ASTACUS ... . . .16 



DIVISION OF THE GENUS CAMBARUS INTO FIVE SUBORDINATE GROUTS . . 16 

 SYSTEMATIC ACCOUNT OF THE SPECIES OF CAMBARUS, WITH THEIR SYNONYMY 



AND GEOGRAPHICAL DISTRIBUTION .... ... 17 



GROUP I. (TYPE, C. Blandingii) 17 



GROUP II. (TYPE, C. advena) 47 



GROUP III. (TYPE, C. Bartonii) 59 



GROUP IV. (TYPE, C. affinis) 85 



GROUP V. (TYPE, C. Montezuma) 121 



THE GENUS ASTACUS 125 



THE SUBGENUS CAMBAROIDES . 126 



SYSTEMATIC ACCOUNT OF THE SPECIES OF CAMBAROIDES .... 128 



TUB NORTH AMERICAN ASTACI 130 



SYSTEMATIC ACCOUNT OF THE NORTH AMERICAN SPECIES OF ASTACUS . 131 



THE EUROPEAN ASTACI 137 



SYSTEMATIC ACCOUNT OF THE EUROPEAN SPECIES OF ASTACUS . . . 141 



NOTE ON THE FOSSIL ASTACID.E 154 



