THE YOUNG OF THE CRAYFISHES ASTACUS AND CAMBARUS 79 



Figure 58. Outer face of left first maxilliped of first stage. 2. A. 



59. Outer face of left second maxilliped of first stage. 2. A. 



60. Outer face of left third maxilliped of first stage. 2. A. 



PLATE VIII. 



Figure 61. Posterior face of left chela of first stage. 2. A. 



62. End of chela of first stage, showing new cuticle and spines within old. 2. D. 



63. Posterior face of left second walking leg of first stage. 2. A. 



64. Posterior face of left third walking leg of first stage. 2. A. 



65. Posterior face of left fourth walking leg of first stage. 2. A. 



66. Posterior face of left fifth walking leg of first stage. 2. A. 



67. Posterior face of left pleopod of first stage. 2. A. 



68. Dorsal aspect of second larva, in Worcester's liquid. 290 mm., A. 



69. Left side of second larva, living, copied from Andrews, :04. 



70. Part of pleopod with some young in second stage left upon it. Drawn living, 



with dissecting stand and Steinheil Aplanatic, No. 9. 



71. Ventral aspect of telson of second stage with included sixth pleopods and anal 



thread issuing from anus; living. 2. A. 



72. Ventral view of right half of telson of second stage to show marginal papillae. 



2. D. 



73. Telson and part of intestine removed, with attached anal thread and portion of 



cast shell, ventral views. In A normal relation is shown; in B the puckering 

 of the intestine when the cast telson shell is pulled away from the telson. 290 

 mm., A. 



74. Portion of intestines and chitinous lining, made transparent to show the limit of 



the cast-off lining (y) and the region (.<) where still attached. 2. D. 



76. Dorsal aspect of left antennule of second stage. 2. A. 



77. Under face of left antenna of second larva. 2. A. 



PLATE IX. 



Figure 78. Outer face of left mandible of second larva. 2. A. 



79. Outer face of left first maxilla of second larva. 2. A. 



80. Outer face of left second maxilla of second larva. 2. A. 



81. Outer face of left first maxilliped of second larva. 2. A. 



82. Outer face of left second maxilliped of second larva. 2. A. 



83. Outer face of left third maxilliped of second stage. 2. A. 



84. Posterior face of left chela of second stage. 3. A. 



85. Posterior face of left second walking leg, second stage. 2. A. 



86. Posterior face of left third walking leg, second stage. 2. A. 



87. Posterior face of left fourth walking leg. 2. A. 



88. Posterior face of left fifth walking leg, second stage. 2. A. 



89. Posterior face of left pleopod of second stage. 2. A. 



90. Dorsal aspect of living larva in third stage. 290 mm., aa. 



91. Left side of living larva in third stage, reduced i/> from 2 aa. 



PLATK X. 



Figure 92. Photograph of side view of adult female and its young in third stage climbing 



under and about the body. 



9,'!. Pbotograph of dorsal side of adult female, with its young in third stage climbing 

 over its back. 



