The anatomy of Lottia gigantea Gray. 



35 



thelial cells. This gland is rather inconspicuous because it usually 

 does not stain deeply. The middle gland seems to consist of a long 

 string of cells, lying over the ventral gland. It is probably branched 





C\rcu.vm 



Fig. L. Cross section through glandular margin of mantle, left side, much enlarged. 

 Circump.N circumpallial nerve, Owe. P. V circumpallial vein, Dors. Gl dorsal pallial 

 gland, Gl glands emptying onto lower surface of mantle, Mar.F marginal furrow, 

 Med. Gl median gland, S.St sense stripe of mantle, V.Gl ventral gland. 



in a horizontal plane as portions appear detached through several 

 sections. The cells are smaller than those of the upper gland and 



A.Sf. 



D M. 



Sh.'.M 



Fig. M. Cross section through whole of mantle to show relation of vascular to 

 glandular area. A. Sp arterial spaces, D.M.L dorsal muscle layer, Ma. L mantle lappet, 

 Ma. V mantle veins, distinct from arterial spaces, V. M. L ventral milscle layer. 



contain granules. The ventral gland (V.Gl) is conspicuous as it con- 

 sists of gigantic cells, of various sizes. These cells possess very definite 

 walls and narrow down from a pouch-like form to a narrow neck 



3* 



