BHACHVIIU. lv 



figs. 7, 8, were delineated on the iMth of that month. .Many thousand* 

 were hatched from the roe of a prolific female on September 25th, and 

 others continued escaping until October loth, when the remaining cap- 

 - ules had disappeared. 



This animal seems leas contentions than some of the race, thoujrh 

 tin- males are always prepared for warfare. The females, however, dwell 

 together in peace. 



The moderate dimensions, and easy preservation of specimens, adapt 

 them particularly for the study of the naturalist. 



PLATE XI. II 



FIG. 1. Cancer (portwwn) licidiu, male; back. 



2. Prolific female ; back. 



3. Same, under surface, shewing the spawn. 



4. Cluster of full and empty capsules ; enlarged. 



5. Cluster of capsule* ; enlarged. 



6. Cluster of 1 1 7 capsules, nearly mature ; enlarged. 



7. Young from the capsules ; enlarged. 



8. Young from the capsules ; enlarged. 



PLATE LXX. Supplemental. Miscellaneous Crustaceans. 

 Flo. 1. Porhmtu /irtYfa, apron of the male. 



2. Apron of the female, external surface. 



3. Oyariiun of the female, nearly matutv. U. i .lining organs, a, b. 



4. Detached ova. 



4. CAXCEK (POBTPNUS) PUSILLUS The Sand Crab. Plates XL11I. 



XLJV. 



According to the plan now proposed, I would rather design to hold 

 the Cancer pagurtis, or Common Crab, as the principal snbjeet here, ami 

 the subordinate paragraphs as accessories. >Y hatever inconveniemv thi- 

 may be attended with, it will be at least productive of .ini].liliation 



