244 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



Fig. 89. Ventral view of female lobster in eighth stage. From lobster No. 3, table 34. Length of lobster 



21.2 mm. (0.83 inch). For first abdominal appendage of this lobster, see fig. 85; for color 



in sixth stage, see pi. 24. 5.3 times natural size. 

 Fig. 90. Left first abdominal appendage of young male. Length of lobster 19.3 mm. (0.76 inch) 



eighth stage. August 14, 1892. 63 times natural size. 

 Fig. 9L. Ventral view of young male. No. 1, table 32. Length of lobster 40.3 mm. (1.59 inches.) 



3.5 times natural size. 



Plate 33. 



Fig. 92. Left cheliped of fourth larva (No. 23, table 34) in process of regeneration from stump, seen. 

 from below. Length of larva 13 mm. Drawn from molted shell of fourth larval stage 

 August 9, 1893. X, plane of fracture. 1-7, segments of limb. 22 times natural size. 



Fig. 93. Left fourth pleopod of second larva, from outer face. 95 times natural size. 



Fig. 94. Left second pleopod of third larva, from outer face. 36 times natural size. 



Fig. 95. First abdominal segment of shell of lobster No. 34, table 34, in sixth stage, seen from behind. 

 Raised from egg, and followed from third larval stage. Length of lobster 16.3 mm. A 

 colored drawing of this lobster is given in tig. 38, plate 25, and a drawing of the first 

 abdominal appendage in fig. 82. 16 times natural size. 



Fig. 96. Left cheliped of molted sbell of fifth larva, seen from above. Regenerated from the condi- 

 tion shown in fig. 92 after the intervention of a single molt. X, plane of fracture. 1-4, 

 segments of limb. 22 times natural size. 



Fig. 97. Left second pleopod of fourth larva, from anterior face, end, endopodite. 36 times natural 

 size. 



Fig. 98. Sterna of the last three thoracic somites of fifth larva. From No. 36. table 34. Length of 

 lobster 14 mm. ; sex doubtful. July 30, 1892. 47 times natural size. 



Fig. 99. Left fourth pereiopod of fourth larva, in process of regeneration. No. 23, table 34. Length 

 13 mm. 1-7, segments of limb. 22 times natural size. 



Fig. 100. Right second antenna of lobster in seventh stage, in process of regeneration, seen from above. 

 No. 34, table 34. Drawn from molted shell, August 8, 1892. 22 times natural size. 



Plate 34. 



Fig. 101. Respiratory organs of second larva, from left side. 8-14, appendages of corresponding 



somites of body. 36 times natural size. 

 Fig. 102. Telson of second larva, from above. 36 times natural size. 

 Fig. 103. Telson of first larva, from above. 50 times natural size. 

 Fig. 104 Caudal fan of third larva, from below. 36 times natural size. 

 Fig. 105. Caudal fan of fourth larva, from above. Alcohol-glycerin preparation. Setse all plumose. 30 



times natural size. 

 Fig. 106. Podobrancbia of left second pereiopod of lobster, probably in fourth stage, from inner side. 



The gill now carries four rows of branchial filaments. 36 times natural size. 



Plate 35. 

 Fig. 107. Left first antenna of the embryo shown in figs. 27, 28, plate 17. Frontal view. 63 times 



natural size. 

 Fig. 108. Right second antenna of the same embryo, from below. 63 times natural size. 

 Fig. 109. Rostrum of second larva, from above. 37 times natural size. 

 Fig. 110. Profile view of carapace of first larva. 13 times natural size. 

 Fig. 111. Profile view of carapace of second larva. 13 times natural size. 

 Fig. 112. Profile view of carapace of third larva. 13 times natural size. 

 Fig. 113. Profile view of carapace of fourth larva. From molt, July 15. Dorsal view of same given 



in fig. 115. The entire outer surface is now studded with short seta j ,. 13 times natural size. 

 Fig. 114. Profile view of carapace of fifth larva, showing tendon marks. General color of larva 



brownish-green; carapace brown. 6 times natural size. 

 Fig. 115. Dorsal view of carapace of fourth larva, from molted shell. Profile view of same is given 



in fig. 113. The median area of absorption is now a broad band which widens in the 



rostral regions and unites with the cervical groove on either side to form a cross-shaped 



figure. 13 times natural size. 



