CRUSTACEA. 61 



The Spider crab is a curious form (Fig. 29) which 

 inhabits the shallow waters along the coast, and is fre- 

 quently found covered with algae, barnacles, or even 



Fig. 29. 



Libiitia canaliculata (after Kmerton). 



oyster-shells, showing that it does not shed its shell as 

 often as the lobster or most of the Brachyura. The 

 form is intermediate, in respect to the shape of the cara- 



the injurious exclusion of the left, will be looked upon as one 

 of the numerous indications of the unenlightened condition of 

 the human mind at the present time. Other indications, such 

 as the barbarous habit of piercing the cars, and the unhealthy 

 practices of wearing corsets and tight boots, are in opposition to 

 the teachings of physiology, as well as those of good taste, and 

 can only be accounted for by the prevailing blindness to their 

 real ugliness and ignorance of the extent of the injuries caused 

 by their use. 



