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DUBLIN UNIVERSITY 



tcrior to the ophthalmic notch, and a apace separates the two posterior 

 from the rest 



The superior antennae (b) have the secondaiy appendage much slighter 

 than the flagellum. Upon the inner side, at the base of the first articu- 

 lation of the peduncle, a squamiform plate is developed. The inferior 

 antennae have the peduncular scale (d) toothed upon the external margin 

 of the apex. 



CSB . AD NAT 



1, P. Jeffreysii, enlarged ; h, 1st foot. 



The second pair of pereiopoda (ambulatory legs) have the leg (a) upon 

 the right short and robust, that upon the left side (a) long and slender, 

 with a multi-articulate carpus. Telson (e) furnished on each side with 

 from six to eight short spines. 



a, Pereiopoda, 2nd pair, right ; a*, do. do., left; b, external antenna ; c, 3rd, 4th, 5th 

 pereiopoda ; d, internal antenna ; e, telson ; /, pleopod ; g, 2nd gnathopod. 



