LIST OF WOODCUTS. 



Xlll 



FiQ. 45. 



„ 46. 



„ 47. 



,, 48. 



„ 49. 



„ 50. 



„ 51. 



„ 52. 



„ !^S. 



„ 54. 



„ 55. 



„ 56. 



„ 57. 



„ .'IS. 



„ 59. 



„ 60. 



„ 61. 



62. 



63. 

 64. 

 65. 

 66. 



Astams fluviatilis. The first and second maxilli- 



PEDES 



The second ambulatory leg . 

 The mandible and maxillae . . 

 The ete-stalk, antennule, and 



ANTENNA 



Blood corpuscles . . . . 



Epithelium 



Connective tissue . . , . 

 Muscular tissue .... 

 Muscular tissue . . . . 

 Nerve ganglia .... 

 Nervb fibres 



CUTICULAE tissue .... 



Sections of embryos . . . . 

 Earlier stages of development 

 Later stages of development . 

 Newly hatched touno . . . 

 torrerdium. \ Comparative views of the cara- 



TwMlis. 

 nigrescens. 



pace, third abdominal somite, 

 and tblson .... 

 Comparative views of the first 



AND second abdominal APPEN- 

 DAGES OF the male . . . 



166 

 169 

 171 



172 

 176 

 178 

 179 

 181 

 182 

 188 

 189 

 191 

 208 

 210 

 216 

 220 



233 



torrentium, 



noMlis. 



nigrescens. 



Cambarus Clarkii 



Farnstaeus brasiliensis 



Astacoides Txadagascarensis 



Diagram of the morphological relations of the 



67. Homarus vulgwris 



245 

 248 

 250 

 251 



253 



258 



68. ■ 



Nephrops. 

 Palcemon. 



P0D0BRANCHI.a 259 



