256 



THE ANATOMY OF INVERTEBRATED ANIMALS. 



mal joints, succeeded by an articulation which is dilated into 

 a sucker, and terminated by an elongated setose joint (Fig. 

 67, A, B) I). These are the remains of the anterior append- 

 ages of the larva. 



From what has been said, it follows that the fixed end of 

 the peducle is, in fact, the anterior extremity of the body 

 of the Z/epas, and that a Barnacle may be said to be a Crus- 

 tacean fixed by its head, and kicking the food into its mouth 

 with its- legs. 



Fig. 67.— A, Diagrammatic 6ection of Balanitis ; B, of Lepas. — a is placed in the cavity 

 of the sac. and lies over the labrum ; b, prosoma ; c, carina; c, I, carino-lateral 

 compartment; I, lateral compartment: r, rostrum; s, scutum; t, tergum; /, penis; 

 g, cut-formed gland ; h. duct connecting this with i, k, cement-duct and glands; 

 I', antennae ; i, peduncular or ovarian tubules; m, ovigerous fraenum; d, anus. 



The mouth of Z/epas looks toward the posterior extremity 

 of the body, and leads into a tubular oesophagus, which 

 passes forward, and opens by a wide superior extremity into 

 the globular stomach. From this point, the alimentary canal 

 bends back upon itself, and gradually narrows into the in- 

 testine, which terminates in the anus, situated at the ex- 

 tremity of the abdomen, on the tergal side of the penis. 

 Two considerable branched caeca, probably hepatic, proceed 

 as diverticula from the stomach, corresponding very closely 



