204 Froceedings of the Royal Irish Academti . 



EXPLANATION OF PLATES. 

 Fig. Plate XXTY. 



1. I-imnestliei'ia ardia : <? ; specimen 1, outline ; x 10 ; (zh, antenna ; A, hand 



or clasping organ (1st trunk-limb) ; m, mandible ; t, telson. 

 la. Telson of Limnesthei-ia ardra; x 40 ; *-, outline of shell; pi, plate: /, 



lamella ; d, denticle ; c sp, caudal spine ; cf, caudal furca. 

 lb. Claspers of Limnestlieria ardra: x 40 ; h, segnienl iv ; <, comb; d, claw 



(segment v^ ; /, forefinger (segment vi). 

 Ic Antenna of Limnestheria ardra; x 20; sc, scape or protopodite; »•,, 



exopoditp; r-,, endopodite; .s, setae. 



2. Antennae of specimen 2 ; x 10 ; r/, claw of one clasper. 



2a. Antenna of specimen 2 ; x 26 ; «c, scape ; s, setae : s/>, spines. 



2b. Clasper of specimen 2 ; x 70 ; h, segment iv ; d, claw (segment v) ; 



p, thumb. 

 .!. Estheria morsei (clasper), much enlarged, after Packard ; b, segment 



iv ; d, claw (segment v) ; /<, thumb; c, comb ; ./, forefinger (segment 



vi). 

 4. Estheria me.xicana (clasper), mudi enlarged, after Packard ; lettering as 



in figure 3. 

 j. ].,ininesthcria ardra (clasper) ; x 68 ; lettering as in figure 3. 



Plate XXV. 



1. Limnestlieria; Specimen 3 ; Outline; x 14; «vi, antenna ; m, mandible ; 



d, claws of clasping organ ; h. hand or clasping organ ; /., telson. 



2. Specimen 4 ; * 14 ; an, antenna ; m, mandible ; (, telson. 

 2a. Telson of specimen 4 ; x 40. 



.". Telson of specimen 5 ; x 40 (see text-fig. 2a) ; pi, plate ; I, lamella ; c sp, 

 caudal spine ; cf, caudal furca. 



4. Specimen 6. Base of autenna and mandible ; x 40, showing relationship 



between positions of scape and mandible (see text-fig. 2n) ; .sc, scape ; 

 m, mandible. 



5. .">i)ccimcn 7. Telson ; ^ 4U ; cj, caudal furca ; c s/), caudal spine. 



C. Telson of specimen 8, showing shell outline and dorsal proces.ses ; x 40 ; 

 pi, plate ; /, lamella ; d, denticle ; csp, caudal spine ; cf, caudal furca ; 



dp. dorsal processes ; s, shell. 

 7. Telson of sjiccimcn 3 ; x 40; d, denticle; c sp, caudal spine ; cf, caudal 



furca. 



