MADETHA. AND TITE CAT^ARY TSLAl^DS. 



149 



feet (fig. 4) alike ; inner branch has one joint only ; outer edge 

 of main branch is finely serrated. Pigment does not extend 

 above the terminal spine, which is somewhat bent and finely ser- 

 rated and clothed with dark hairs on dorsal side. Fifth feet of 

 male (fig. 5) each 3-jointed, the right foot having extension on 

 inner side of middle joint, both terminated by two small claws. 

 Abdomen of male (fig. 6) 3-jointed, the third being nearly equal 

 in size to the other two ; caudal segments about twice as long as 

 broad, terminated by short strong setae. 



Several specimens of this strongly marked form were taken 

 at Orotava, TenerifFe, all of which appear to be males. 



It .has strong points of resemblance to both Candace pacliy- 

 dactyla and C. truncata, Dana, but is evidently distinct from 

 both. The dark rings on the anterior antennae distinguish it at a 

 glance. 



Cat^dace brevicorj^^is, n. sp. (PI. X. figs. 7, 8.) 



Several specimens of a Candace were taken at Orotava and at 

 Santa Cruz, Teneriffe, which, although corresponding in most 

 respectd wdth C. truncata, Dana, differ in some particulars which 

 are of sufficient importance to render it specifically distinct. 



In the first place the anterior antennae are composed of eighteen 

 joints only, while C. truncata has twenty-four. Then the first 

 four pairs of swimming-feet (fig. 8) are the same as in C. truncata, 

 except that in our specimens, to which I propose to give the name 

 C. hrevicornis, the setae are all elegantly plumed, much resembling 

 minute black feathers. No fifth feet can be made out in any of the 

 specimens obtained. Abdomen only 2-jointed, the caudal seg- 

 ments being long and straight, while in C. truncata they are 

 somewhat istumpy and divergent. The basal joint of the abdo- 

 men is less triangular than in C. truncata. Our specimens are 

 probably all females. 



DiAS LONGiREMis, LUljehorg. 



AcARTiA LAXA, Dana. 



A. DENTICORNIS, Brady. 



In all our specimens of both species of Acartia there is a long 

 recurved spine at distal end of first joint of each anterior antenna, 

 which does not appear to have been previously described, 



Drepanopus ruRCATUS, Brady. 



Several females of this species were found, but no males ; a 



LIT^N. JOURN. — ZOOLOGY, VOL. XX. 13 



