EUDACTTLINA ACANTHI!. 129 



genital segment being fully as large as the other two 

 combined. 



Antennules short, tolerably stout, and tapering 

 towards the distal end ; first two joints large and 

 together equal to more than half the entire length of the 

 antennule ; the curved spine at the distal end of the 

 second joint much smaller than the spine similar to it 

 on the antennules of Eudactylina acuta, and the strong, 

 elongate, nearly straight spine at the distal end of the 

 third joint in that species wanting here. Antennae 

 somewhat similar to those of Eudactylina acuta, but 

 the stout spines on the first and second joints wanting. 

 Second maxillipeds cheliform, other mouth-appendages 

 similar to those of the species mentioned above. 



The inner ramus two-jointed in all the four pairs of 

 thoracic legs ; the outer ramus of the first pair con- 

 sisting apparently of only one joint, or of two subequal 

 and coalescent joints, those of the next three pairs 

 appearing to be composed of three joints, but the 

 articulation between the second and third joints not 

 so distinct as that between the first and second ; in the 

 first pair the inner ramus is provided with a number 

 of short but stout spines chiefly on the exterior aspect, 

 and the outer fringed with minute setas ; a small spine 

 also springing from a notch near the middle of the 

 outer margin and two or three small setse from the 

 distal end. The inner ramus in the second pair some- 

 what similar to, but rather stouter than, the inner 

 ramus of the first pair ; the outer ramus three-jointed, 

 but the second and third joints appearing to be co- 

 alescent ; both rami fringed on the exterior edge with 

 small prickles, the outer margin of the first basal joint, 

 which is somewhat expanded, forming a rounded 

 gibbose projection, also fringed with similar prickles, 

 which are scattered sparingly over portions of all the 

 joints. The remaining two pairs somewhat similar in 

 structure to the second but rather more robust and 

 less spiniferous. The fifth pair resembling those of 

 Eudactylina acuta, but differing slightly in their form 



VOL. I. 9 



