GENERAL AXATOMY OF THE SQUID. 



353 



which open at their anterior end mto the mantle cavity. 

 They excrete the capsules of the egg masses. In front 

 of them, wrapped around the intestine and ink bag, are 

 the much smaller accessory glands. 



b. The ovary (Fig. 183, o) is situated, like the testes, in 

 the dorsal portion of the posterior end of the visceral 

 mass, and it is enclosed, like the testes, in a capsule, into 

 which the eggs escape, to be taken up by the oviduct. 

 The oviduct (Fig. 183, o, d) is a long, transparent, foli- 

 ated tube, opening into the left side of the capsule of the 

 ovary. 



c. Xear its anterior end the walls become thickened to 

 form the ghmd of the oviduct (Fig. 183, (/), and in front 

 of this the oviduct runs forwards as a thick-walled tube 

 (Fig. 183, h), which opens into the mantle cavity on the 

 left side, near the base of the siphon. 



VIII. The anatomy of the brain, the sense organs, and 

 the buccal body, can be best studied in a series of trans- 

 verse sections through the head, and very small specimens 

 should, if possible, be selected, as the sections may then 

 be made thin enough for microscopic examination. 



During the summer, small squids, from half an inch to 

 an inch and a half long, may frequently be found swim- 

 ming at the surface of the ocean during the middle of the 

 day, and they may be captured \vith a hand-net. They 

 should be placed for three hours in a one-tenth per cent 

 solution of chromic acid. They should then be placed 

 for about six hours in a three-tenths per cent solution, 

 and then, for the same time, in a one per cent solution. 

 They may then be placed in seventy per cent alcohol, 

 which should be changed in about twenty-four houi-s for 

 eighty per cent. After they have been in this for about a 

 day, they may be kept in eighty-five per cent or ninety 



