47 



epidermis of the opposite side. Yitzou lias termed such 

 cells " colonnades de soutien." 



The cells of the epidermis are also elongated at the 

 point where the muscle fibres arise. 



FIG. 8. Diagrammatic section through the integument of a hard crab. 



a. = cuticle. 



b. = pigmented layer. 



c. calcified layer. 



d = non-calcified layer. 

 e. epidermis. 



/. = basement membrane. 

 g. = dermis. 



h. ~ duct of the cutaneous gland. 

 k. = muscle attached to the base- 

 ment membrane. 



I. = cutaneous gland. 



The dermis (g.} lies below the basement membrane, 

 and varie? in thickness. It consists mainly of a network 

 of connective tissue fibres and scattered cells. There is 

 a layer of pigment cells close to the basement membrane. 



