içii.] F. H. Stewart : Development and Anatomy of Cirripedes. 51 



EXPLANATION OF LETTERS USED IN PLATES. 



ad.m., adductor scutorum muscle; al.c, alimentary canal; ant., antennae; a.p.c, 

 aperture of palliai cavity; b.sh., bivalve shell; ca., carina; caec, caecum; ce.g. and 

 cer.g., cerebral ganglion; e.g. and c.gL, cement gland cell; cu. and cut., cuticle; 

 d.c.g., dorsal cerebral ganglion; d.e., ductus ejaculatorius; e., eye; e.c, cuticle of 

 cyprid surrounding pupa; ect.n., ectodermal nucleus; ep., epidermis; ep. i, epidermis 

 lining palliai cavity; ep. 2, epidermis of true body; f.g., finely granular yolk mass; 

 gang., ganglion; g.c.n., gonocoel nucleus; h., hair; i.e., cuticle of pupa; int., intestine ; 

 la., laterum; l.m., longitudinal muscle (in pi. v, fig. 2, points to mass in stomach); m., 

 mouth; m.p., mesodermal parenchyma; n., nerve; oes., oesophagus; o.d., wall of 

 ovarian tube; ov., ovary (ov. in pi. iv, fig. 5, indicates ovum); ov.n., ovarian 

 nucleus; p., penis; p.ap., palliai aperture; p.c., palliai cavity; p.s., prosoma; r., 

 rostrum; r.c, red cells = cement cells; r.d., rostral duct; sc, scutum; s.h., sensory hair; 

 sp., spaces of the peduncle; st., stomach; t., testis; te., tergum; ves.sem., vesiculae 

 séminales; v.n.c, ventral nerve cord; x, cell of unknown function; y., yolk; y.c, 

 yolk cell. 



