THE DECATOD AND STOMATOPOD CRUSTACEA 1 53 



Family HIPPOLYTID^. 

 HIPPO LYSMATA WURDEMANNI (Gibbes). 



Hippolyte iviirdemaiini Gibbes, Proc. Amer. Assoc. Adv. Sci., in, 197 



[33]. 1850. 

 Hippolysviata wurdemanni Kingsley, Proc. Acad. Nat. Sci. Phila., xxx, 



1878, 89 [i]. 

 Mamanguape stone reef ; one specimen. 



HIPPOLYSMATA RHIZOPHOR^ sp. nov. 

 PL VIII, fig. 9. 



Female. Carapace with a median carina on its anterior fifth. 

 Median spines three, one on the carapace proper, and two on the ros- 

 trum ; extremity of rostrum a slender spine not reaching to the end of 

 the first antennular segment ; no inferior spines. An antennal spine 

 present. 



Antennular peduncles elongate, the second segment twice as long as 

 the third ; two slender flagella, the upper a little thicker than the lower 

 in its basal portion, or for about 32 segments; the lower one twice as 

 long as the carapace; the upper one shorter, at least in the single 

 specimen in hand. 



Basal antennal spine short. Scale short, extending half the length 

 of the third antennular segment, broad, extremity rounded ; outer dis- 

 tal spine strong. Peduncle equal to the scale in length; flagellum 

 two-thirds the length of the body. 



External maxillipeds extending beyond the antennular peduncle by 

 the length of the dactylus and half the propodus. Propodus with a 

 distal spine. Dactylus with a marginal row of spines in pairs, and 

 two or three spines at the extremity. 



First pair of feet reaching a little beyond the propodus of the max- 

 illiped. Carpus intermediate in length between the palm and the pro- 

 podus. Palm with subparallel margins ; fingers two-thirds as long as 

 palm. 



The carpus of the second pair of feet, when extended, reaches to 

 the end of the maxilliped. The carpus is 24-jointed. Palm and 

 fingers subequal in length. 



The sixth segment of the abdomen is one and one-half times as 

 long as the fifth. The telson has four rather large spines forming a 

 rectangle on the dorsal surface ; the extremity is subtruncate, with two 

 long submedian spines and two shorter spines outside of these. The 

 inner caudal lamina is oval- lanceolate and extends behind the telson 



