Eurydice convexa 147 



Colopisthus parvus Richardson, 1902 

 Figure 66A 



DIAGNOSIS 9 3.6 mm. Eyes large, well pigmented. Frontal lamina prox- 

 imally narrow, anteriorly widened to truncate distal margin. Antennules and 

 antennae short, latter reaching posteriorly to pereonite 1. Pleotelson with 

 strong middorsal ridge. 



RECORDS Bermuda; Puerto Rico, intertidal rocks and algae. 



Eurydice Leach, 1815 



DIAGNOSIS Antennular peduncle article 2 at right angle to article 1 . Anten- 

 nal peduncle of four articles. Frontal lamina usually slender; clypeus usually 

 a ventrally directed triangular blade. Maxillipedal endite reduced, lacking 

 coupling hooks. 6 pleopod 2 with copulatory stylet articulating at mid- 

 length. Pleopod 5, endopod lacking marginal setae. Pleonite 5 with free lat- 

 eral margins, not overlapped by pleonite 4. Uropodal sympod not produced 

 along medial margin of endopod. 



Key to species of Eurydice 



1 . Frontal lamina distally truncate to faintly bilobed 2 



Frontal lamina lanceolate, distally acute personata 



2. Posterior margin of pleotelson between notches rounded, with four 



moderate spines convexa 



Posterior margin of pleotelson between notches almost straight, with 

 four very short spines and several elongate setae piperata 



Eurydice convexa Richardson, 1900 

 Figures 66B-E, 67A,B 



DIAGNOSIS S 6.1 mm, 9 6.1 mm. Frontal lamina slender, anteriorly widen- 

 ing slightly and becoming truncate to faintly bilobed. Posterior margin of 

 pleotelson between lateral notches convex, with four spines and few setae 

 between serrations; spines between three and four times longer than wide. S : 

 Plicate process on antennal flagellar articles about 'A length of article. 

 Pleopod 2 with copulatory stylet distally blunt, reaching well beyond rami. 



