PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM [1885. 



EXPLAl^ATION OF PLATE XH. 



Eefeeences : a, anal lobe ; ao, aorta ; c, vitelline capillaries ; ca, carotid ; cd, caudal lobe ; cv, cardinal 

 or caudal vein ; eh, cborda dorsalis ; d, dorsal lobe ; ep, epiblaat of yelk-sac ; (j, goblet 

 cells of epiblast ; h, beart ; i, intestine ; j, jugular ; L, liver ; U, lateral line ; m, cut ends of 

 dorsal halves of tbe muscular segments; 7ns, medulla spinalis ; n, caudal notch; o, round 

 spaces in sections of vitellus in which oil has been contained ; p, periblast; pe, pectoral; 

 pv, po»tal vessel, preanal lobe; r, ribs, cut through obliquely in the section; s, segmental 

 intermuscular vessels; sc, caudal sinus; scl, subclavian artery; sd, soft dorsal lobe; si, 

 subintestinal vessel ; v, vent ; vv and vv', vitelline veins ; vc, vente cardinales ; vm, meso- 

 blastic investment of vitellus ; vt, ventral fin ; Wd, Wolfliau duct. 



FiCr. 1. — Eecently hatched embryo of the Schoodic or landlocked salmon, viewed from the left side and 

 figured from the living specimen, x 7 -[-. 



Fig. 2. — Same viewed from the right side, x 7 +• 



Fig. 3. — Diagram of the circulatory system of the young salmon. 



Fig. 4. — Cross-section through the body and yelk of a young salmon, through the region of the liver. 

 xl6. 



Fig. 5. — Section through the epidermis of a salmon embryo to show the goblet cells g. x 200. 



