I1KACII VI IM. 177 



if specimens are causally brought ashore, they are always so maltreated, 

 that I cannot uiliriu I have ever witnessed tlu-ir MIIA i\;un for any 

 length of lime, to bring the roe to maturity. Therefore, it is chielh 

 from younger individual- that we can look for satisfactory result*. 



As tin- uvariiiiu swells, the anxiety of the parent for its preservation 

 from injury, becomes very evident. When elevating the apron or breast- 

 plate, it in kept free of external pressure, by the creature continually 

 standing on the limbs, and rising higher and higher to avoid contart 

 with other substances below. 



ll nee, it \\ill be observed, that the capsules are not deposited, but 

 burst like the former, while attached to the parent, for escape of the 

 younj:. These are of the wonted form, resemble the preceding, nor are 

 distin.trui.-hed by any peculiarities. 



The crab-fishery seems to IK' neither a lucrative nor a favourite em- 

 ployment in Scotland ; and, although many are occupied in it, chiefly 

 on a small scale, it appears to be always deserted when other branches 

 of such marine pursuits occur. 



1'I.VTK XXXVIII. 



Flo. 1. Cancer paaurut, tbo Common Crab, back. 



2. The same, breast. 



3. Cluster of ova, natural size. 



4. Portion of the same enlarged. 



5. Portion more enlarged. 



PI.XTK XXXIX. lli-tory of a white sped men. 



FIG. I. Caiuxr pagunu, young, taken 29th September. 



2. The same, after its first exuviation in captivity, on November 9. 



3. The same, after exuviation on April 30, following November 9. 



4. The same, after a third exuviation, on September 12. Back. 



5. The same. Breast. 



6. The same, after a fourth exuviation on March 21), following Nov. 12, 



when tlu- wlnilr d^'lit legs proved deficient. Back. 



7. The same. sh.-\\inj: tin- di f Breast, 



8. The same, after a fifth exuviation on June 23, when all the parts 



Wre restored entire. Back 



z 



