BRACHYURI. 183 



figs. 7, 8, were delineated on the 26tli of that month. Many thousands 

 were hatched from the roe of a prohfic female on September 2oth, and 

 others continued escaping until October 15th, when the remaining cap- 

 sules had disappeared. 



This animal seems less contentious than some of the race, though 

 the 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 XLII. 



Fig. 1 . Cancer (portunus) lividus, male ; back. 



2. Prolific female ; back. 



3. Same, under surface, shewing the spawn. 



4. Cluster of full and empty capsules ; enlarged. 



5. Cluster of capsules ; enlarged. 



6. Cluster of 117 capsules, nearly mature; enlarged. 



7. Young from the capsules ; enlarged. 



8. Young from the capsules ; enlarged. 



Plate LXX. Supplemental. — Miscellaneous Crustaceans. 

 Fig. 1. Portunus lividus, apron of the male. 



2. Apron of the female, external surface. 



3. Ovarium of the female, nearly mature. Retaining organs, a, I. 



4. Detached ova. 



§ i. Cancer (portunus) pusillus — The Sand Crab. — Plates XLIIL, 



XLIV. 



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

 the Cancer pa()urus, or Common Crab, as the principal subject here, and 

 the subordinate paragraphs as accessories. Wliatever inconvenience this 

 may be attended with, it will be at least productive of simplification. 



