CONTENTS. 
AGE 
Limiration or THE Faminy AstTAcip& : : ‘ : fe : - F : et 
Dracnosis oF THE Faminy AsSTAcIDEH . ; : F ‘ ; : . ; 1 
Division OF THE FAminy INTO TWO SUBFAMILIES, PoTAMOBUN AND PARASTACIN.E 2 
Division or THE PoTAMOBIINE INTO TWO GENERA, CamMBaRUS AND ASTACUS g y) 
Tue Genus CamMBARUS . : - 0 a . : : : i : F 3 
BIspLioGRAPHY OF THE GENUS CAMBARUS FROM THE YEAR 1868 To THE PreEs- 
ENT Time . 7 : 3 ‘ < % ; P : : - : 4 
Notice or Hacen’s MonoGraruH or THE Norto AMERICAN ASTACIDE 8 
Hacen’s Nores on THE Types or Ericuson’s anp Dr SaussureE’s SPECIES 
OF CAMBARUS IN THE Bertin Museum . é : : : ; s 9 
Novice oF THE EXTANT TYPES OF CAMBARI DESCRIBED BY AMERICAN AUTHORS 
BEFORE THE Date oF HAGEN’s MONOGRAPH . 3 : : 3 : 10 
On THE TWO Forms or THE MALE IN THE GENUS CAMBARUS ; 3 5 ae 
Inpications oF HERMAPHRODITISM IN CAMBARUS . 5 a 5 2 ; 12 
PECULIARITIES OF THE YOUNG STAGES OF CAMBARUS , ; : : 4 ls 
Rank oF THE SuBramMiLies PoramMopiuna AND PARASTACINZ, AND OF THE 
GryErRA CamMBARUS AND ASTACUS . 7 5 - é é 5 E 16 
Division OF THE GENUS CAMBARUS INTO FIVE SUBORDINATE Grours . AG 
Systematic ACCOUNT OF THE SPECIES OF CAMBARUS, WITH THEIR SYNONYMY 
AND GEOGRAPHICAL DISTRIBUTION . : A : ; : ; 17 
Grove I. (Tyrr, C. Blandingii) . < - ; ; : : . 5. lye 
Group II. (Tyrxr, C. advena) .« : : ; : : ; : : 47 
Group III. (Typr, C. Bartonii) . ; . Z ¢ - - 5 a< BM) 
Group IV. (Typr, C. affinis) . : é 2 c Z - z = 85 
Group V. (Tyrer, C. Montezume) : : 5 : . F : op le 
Tue Genus Astacus : : 4 z c é 5 5 A - : 3 125 
THE SuBGENUS CAMBAROIDES . é = 5 . é ieee : al26: 
Systematic ACCOUNT OF THE SPECIES OF CAMBAROIDES . F : x 128 
Tue NorrH AmerRIcAN ASTACI . ; : c . - J : , 5 agit) 
Systematic Account or THE Nortu AMERICAN Srectes oF ASTACUS . 131 
Tue Evropean ASsTAcr : : A - : ‘i : ; a : a ode t 
Systematic AccounT oF THE EvRoPEAN SPECIES OF ASTACUS . : A 141 
Nore on tHe Fossizr AsTacip& ; 3 2 : 5 A 5 A A a lb: 
