260 University of California Publications. [zoology 



LIST OF ABBREVIATIONS USED IN THE PLATES. 



COn.ni. — constrictor muscle fibres. 



c.t.b — connective tissue bundles. 



e.t.l. — connective tissue layer of gland walls. 



C.t. — connective tissue in epidermis. 



c.«'. — cell walls. 



d. — duct of gland. 



<Iil.ni. — dilator muscle fibres. 



<■/./.— elastic fibres. 



ep. — epidermis. 



ep.m.c. — cell containing musculature of duet. 



tl.r. — funnel cell. 



i.e.!. — inner layer of corium. 



l.d. — lumen of duct. 



l.gl. — lumen of gland. 



in Ji. — muscle bundles. 



iii.c.J. — middle layer of the corium. 



m.f. — muscle fibres. 



m.gl. — mucous gland. 



m.n. — muscle nucleus. 



n.c. — nerve cord. 



ii. i'. — nerve endings. 



it ll.c. — nucleus of funnel cell. 



n.f. — nerve fibre. 



nuc.m.c. — nucleus of mucous cell. 



nac.p.C. — nucleus of poison cell. 



nue. ep.m.c. — nucleus of muscle cell in epidermis. 



o.e.l. — outer layer of corium. 



p. H.c. — processes of funnel cells. 



p.gl. — poison glands. 



pig. — pigment. 



prol.m.f. — prolongations of muscles Into epidermis. 



rep.c. — replacement cell (and nucleus). 



ri jujl. — replacement glands. 



sec. — secretion. 



All the figures were drawn with the Abbe camera lucida. 



