EXPLANATION OF THE PLATES. 



TAB. I. 



Eig. 



1. Zepas anatifera, (nat. size.) Far., with a row of 



square, dark-coloured marks on 



the scuta and terga. 

 la. „ „ external view of carina, magnified 



thrice. 

 \b. „ „ lateral view of carina, magnified 



thrice; var. dentata. 

 \c. ,, ,, internal view of right-hand scutum, 



to show the tooth at the umbo. 



2. Zepas Ilillii, (nat. size.) 



3. Zepas pectinata, (magnified thrice.) 



3a. „ „ var. (spirilla), tergum, magnified 



thrice. 



4. Zepas anserifera, (nat. size.) 



5. Zepas australis, (nat. size.) 



5#. „ „ carina, external view of, magnified 



twice. 



6. Zepas fascicularis, (nat. size,) with its peduncle, 



together with those of three 

 other specimens, imbedded in 

 a vesicular ball of their own 

 formation, of which a slice 

 has been cut off to show the 

 internal structure. The spe- 

 cimen is in the College of 

 Surgeons. 



