Figure 17

1830 ANNIVERSARY MEMOIRS OF THE BOSTON SOCIETY OF NATURAL HISTORY 1880

THE DEVELOPMENT OF THE SQUID.

LOLIGO PEALII (LESUEUR).

Fig. 17

Posterior surface of a somewhat older embryo; e, eye; i, ink bag; r, rectum. The other letters as in figure 15. (see below)

a', a", a"', a"", the four arms of the right side; f the fin; g, the gill; n, the branchial heart; m, the free edge of the mantle; nc, the neck cartilage; si, the siphon tube; si', the lateral chamber of the siphon; v, the valve of the siphon; x, the space between the integument and the surface of the external yolk; y', y'', y"', y"", the four divisions or regions of the yolk.


	Posterior surface of a somewhat older embryo; e, eye; i, ink bag; r, rectum. The other letters as in figure 15. (see below)
	a', a", a"', a"", the four arms of the right side; f the fin; g, the gill; n, the branchial heart; m, the free edge of the mantle; nc, the neck cartilage; si, the siphon tube; si', the lateral chamber of the siphon; v, the valve of the siphon; x, the space between the integument and the surface of the external yolk; y', y'', y"', y"", the four divisions or regions of the yolk.